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VAISALA HMP228 User Guide

1. a dala pits Selecting stop bits mi foir Pi Fh of h ta aif duelex 1 Lex The processor does not allow the following combinations e no parity 7 data bits 1 stop bit if this combination is given the HMP228 programme will change the number of stop bits to 2 e even or odd parity 8 data bits 2 stop bits if this combination is given the programme changes the number of stop bits to 1 NOTE The serial bus settings become effective only after reset 1 1 1 3 Setting the transmitter address Address is used when more than one transmitter is connected to one serial bus it makes it possible to communicate with one transmitter at a time e Select More in the main menu and Addr in the More menu the following is displayed 68 HMP228 M210282en A Appendix 2 Display commands a a e Pressing ENT returns the programme to the main menu e Pressing CL deletes the old address enter the new address with the arrow keys 1 1 1 4 Selecting the output units e Select Unit in the main menu t
2. or ALARM 1 de F opto outputs ALARM 2_ max 30 mA r H X5 Figure 1 Relay and opto outputs When the relay is not activated the C and NC outputs of the screw terminal are closed When the relay is activated these outputs are opened and the C and NO outputs are closed If required the relays can be activated by inserting a jumper to the test connector X4 By inserting the jumper to two pins on the left relay 1 is activated and by inserting the jumper to two pins on the right relay 2 is activated The alarm output unit is delivered with the alarm outputs in OFF mode not in use Therefore the customer needs to set and take into use the desired outputs If the mains power is in use only an authorized electrician may connect the alarm unit A readily accessible disconnect device shall be incorporated in the fixed wiring IEC 950 For alarm output cabling remove the plastic plug in the transmitter housing and replace it with the cable gland Fasten the alarm unit to the bottom of the housing with four screws Attach the grounding wire with the screw and washer to the grounding terminal on the right hand side of the module if the mains power is in use Attach the ribbon cable from X3 of the alarm unit to the X16 on the main board of the transmitter NOTE NO jumper in connector X4 during normal operation When one alarm unit relay is on
3. T o i AS a a Cl a oo e SSS L O oso O S SS A PIE gt al o RS 485 422 Oa serial bus lt J Cut off the resistors R2 R3 and R4 on the main board New signal names for X6 screw terminal are on the module Follow the instructions on the module X1 to X4 and X2 to X5 on the mother board NOTE If the transmitter is NOT at the end of the bus OR the line has a dynamic line termination the resistors R3 and R6 have to be removed Connect the data wires to screw terminal X6 on the main board Switch the power on 78 HMP228 M210282en A Appendix 4 RS 485 422 serial port module 2 OPERATION The HMP228 transmitters can either be given an address or operated without an address Both single and dual loop wiring with half duplex connection can be used No address is needed when only one HMP228 transmitter is used when several transmitters are connected to the same line each transmitter must be given an address in the initial configuration A single transmitter can get its operating voltage from the master or it can have its own floating power supply or it has the power supply module in use The serial line structure is a parallel interfaced chain daisy chain At the ends of the serial line there must be a H
4. 120 Dimensions of the HMP228 electronics housing in mm HMP228 M210282en A Operating Manual fitting body parallel thread hex 24mm G1 2 ISO 228 1 tapered thread BS 2779 JIS B0202 RV2ISO71 g rs y 4 219mm drilling RM gt 10 5mM AAS Process or pipe wall 1 LOCTITE No 542 activ No 7649 t 55 150 C 2 MEGA PIPE EXTRA No 7188 t 55 170 C 3 PTFE tape t 60 210 C NOTE the tape does not lock the parts together Therefore use two fork spanners hex 24 and 27 mm for tightening and opening the dasp nut of the probe Figure 2 2 3 Sealing and thread cutting for the fitting body The fitting body can be installed e g on standard pipe fittings G 1 2 ISO 228 1 or on a thread in the process wall If the wall thickness is less than 10 5 mm it is recommended to use a welded sleeve see Figure 2 2 4 Note that the minimum recommended distance of the fitting body and the probe head is 40 mm see Figure 2 2 3 Adjust the probe to a suitable distance according to the type of installation and tighten the clasp nut first manually mark the fitting body and the clasp nut and tighten the clasp nut a further 50 60 with a fork spanner see
5. Ue voltage selector switch 115 230 VAC M4 screw and washer for protective ground terminal AC mains terminal 74 replace plastic plug with cable gland for 7 12 mm cable probe cable gland signal cable gland arrange signal cable wires so that they do not reach bare AC wires when the cover is closed power supply cable strip wires only 5mm use crimped terminal for ground wire if stranded wire is used HMP228 M210282en A Appendix 3 Power supply module Peel the correct power supply voltage from the sticker enclosed in the power supply module package and attach it on the instrument label to indicate that the supply voltage has been changed NOTE The power supply module cannot be used if the re gaining option has been activated WARNING Do not detach the power supply module from the transmitter when the power is on Do not connect the power supply to mains when it is not installed in the transmitter WARNING Always connect protective ground terminal 75 HMP228 Appendix 3 Power supply module M210282en A 3 TECHNICAL SPECIFICATIONS Operating voltage 115 VAC 93 127 V 230 VAC 187 253 V Connections input screw terminals 1 5 mm wire AWG 16 output screw terminals 2 5 mm wire AWG 20 Bushing for 7 12 mm diameter cable Indicator PWR ON LED on power
6. process pipe chamber A 4 Figure 2 2 3 1 Installing the sensor head through the ball valve assembly NOTE The probe can be installed in the process through the ball valve assembly provided that the process pressure is less than 10 bars This way the process does not have to be shut down for installing or removing the probe However if the process is shut down before removing the probe the process pressure can be max 20 bars HMP228 Operating Manual See Figures 2 2 3 2 2 2 3 4 for detailed description of installation through the ball valve assembly Note also that if the sensor head is installed in a process pipe the nominal size of the pipe must be at least 1 inch e STEP I mount the probe with the ball valve assembly closed bushing R1 2 cone G1 2 40 bar e g Camozzi 2520 1 2 1 2 l the bushing serves for NOTE moving the probe sinter tighten the clasp so such a distance from the nut manually a ball valve that the valve A can be closed 4 N el y fitting body ete R1 2 cone sealed A ball valve 1 2 40 bar Us g dd NET a e g Atlas Copco Nees gt 30 mm BAL 1A 15 G1 2 X E bushing g R1 2 cone sealed is
7. e Select Scale The quantity and scaling for channel 1 are displayed Chil Bu Ay we 1 Be E e Ifthe settings are correct press ENT 34 HMP228 M210282en A Operating Manual 4 8 e If the settings need to be changed press CL the quantity aw T starts flashing it can be changed with the arrow keys and acknowledged with the ENT key the lower limit starts flashing acknowledge the lower limit with ENT or start changing it by pressing CL a new lower limit is given with the arrow keys the upper limit starts flashing acknowledge the upper limit with ENT or start changing it by pressing CL a new upper limit is given with the arrow keys e When channel 1 has been set the programme goes on to channel 2 the procedure is the same as with channel 1 Sin G A ASE i ARA Checking and calibrating the analogue outputs The operation of analoque outputs can be tested by forcing the outputs to given values See on appendix n ITEST command 4 8 1 Measurement of output currents using test points If a current output has been connected e g to a process computer the output current cannot be measured at the output connector X2 wit
8. Power supp o aav SoSo Chi Che Rx CH1 and CH2 are connected together internally X2 Current loop or RS485 module DO NOT USE POWER SUPPI Co GROUND AS OUTPUT Sensor connecti n SIGNAL GROUND X1 Figure 2 3 1 Electrical connections HMP228 M210282en A Operating Manual Power supply 24 VDC 24 VAC see Chapter 2 3 2 with power supply module 115 230 VAC Output signals 0 20 mA 4 20 mA 0 1 V 0 5 V 0 10 V Power supply ground is connected to the housing with parallel connection of 15 nF capacitor and 300 KQ resistor See Appendix 3 on how to connect the power supply module to the transmitter 2 3 2 Connection to an AC supply The HMP228 transmitter can also be connected to an AC supply without an external rectifier However when more than one transmitter is connected for example to one 24 VAC transformer a common loop is formed and there is an increased risk of a short circuit To avoid this always use separate floating supply for each transmitter see Figure 2 3 2 A However if several transmitters have to share one transformer the phase must always be connected to connector in each transmitter see Figure 2 3 2 B A NO COMMON LOOP FORMED RECOMMENDED HMP228 transmitter Controller ee voltage signal output 4 E HMP228 transmitter B COM
9. ceeeeeeeeeeeeeeeeeeeeeeeee es 9 2 3 Signal cabling ANd grounding mmmccccccccccnonannnncnnnnnncnnnnnnnn cn nn nr cnn rr crac 10 2 3 1 Electrical connections tii eins 10 2 3 2 Connection to an AC supply coooccccccccccnononocnconnnnconnnonnnncnncnnconnnnnnananccnnccncnnns 11 2 3 3 Grounding tt A A E a tb 12 3 COMMISSIO NN G e ar aE r r a aa eiii E e ea EEE eanan Easain 14 3 1 Changing the parameters cccccccconnnnnncnnonnnnonannannn nn nn cnn 14 3 1 1 Security lock UMPET oooocococononcccccnnnnncnnnonncnccnnnnconnnnnnancnnnnnconnnnnnananccnncnncnnns 14 3 1 2 Commands and security lock jUMper oooocciccnncicoconocaconcnnconcnnnnnncncnnncnncnnns 15 3 2 Using the RS 232C serial DUS ooooooonnnnnnnncnnncnnonannnncnnnnnnnno anna nr rr rr cnn anne 16 3 3 Using LED COMMANGG cccccceeeeeeee eee ee nn nr 18 3 4 Using display keypad COMMANdOS ocoommncccccnnnccnnnonn nene nr nn 18 3 4 1 Display Mode cai a A ees 18 3 4 2 Command Mode toria a ts iia ns 19 3 4 3 Entering nuMbeIS tocata od std lcd ea 19 4 MAINTENANCE ui a diia 20 4 1 Self diaQGnOStiCS cui cues dvecteucauecteadveestice 20 4 2 Reference measurements ccecceeeeeceeeenceeeenceeeenseeeenseeeenseeeenseeeenseeeenseesensensensoes 20 4 3 Moisture calibrato Merei cipal datar a 21 4 3 1 Two point calibration procedure oooccccconcccccnnccnnccnncnnnnnnncnnnnnnnnrnnnnnncrnnnnnnns 22 4 3 1 1 Using serial COMMANAS oooocccccnonnccnnnnnnccnnnnnnccnnnnnnccnnnnnncnnnn
10. 9 980 lt cr gt Ch2 Ul V 0 120 lt cr gt Ch U2 V 9 980 lt er gt 4 8 1 2 Using display keypad commands e Connect an ammeter voltmeter to the output of channel 1 select Cali in the main menu and Analog outputs in the Cali menu The follow ing is displayed the quantity can be either mA or V Chal 11 me m a e Enter the measured lower end current voltage on channel 1 Chl Le m m a e Enter the measured upper end current voltage on channel 1 Gae 11 mb m i e Connect the meter to the output of channel 2 and enter the measured lower end current voltage on channel 2 m Gne da m B e Enter the measured upper end current voltage on channel 2 37 HMP228 Operating Manual M210282en A 4 8 1 3 Using LED commands If both the analogue outputs and humidity temperature channels are calibrated the analogue outputs should be calibrated first This applies only when the calibrations are made using the LED commands e connect an ammeter voltmeter to the analogue outputs connector X2 e Give command OO e the LED on the left flashes set the low end of channel 1
11. Calibr date 0 22 Outputting the transmitter settings also in POLL mode 64 HMP228 Transmitters M210282en A Appendix 1 Serial commands Command outputs the same information as command but it works also when the transmitter has been set to POLL mode However if there are more than one addressed transmitters connected to the serial bus they all will re spond at the same time and the output on the screen will be chaotic FILT Setting the averaging time FILT nnnn lt cr gt This command is used to set and inspect the avaeraging time during which the individual measurement samples are integrated to get an averaged reading The time can be set in seconds within the range of 0 1000 0 no averaging time For example gt FILT nnnn lt cr Filter S 5 lt cr gt gt gt FILT lt cr gt Filter eee LO lt er gt gt 65 HMP228 Appendix 2 Display commands M210282en A APPENDIX 2 DISPLAY COMMANDS 1 DISPLAY COMMANDS 00ciconttera cirio alain cit aaa aa aae aaraa aa Aa daria ie dada 67 1 1 Display keypad commandS o0oncccoonnncccnnnnnnnnnnnnnnnnnn nn nn rre 67 41 4 Output via the serial DUS enntre aou aa a eaten desta rab cado aa aan ian 67 1 1 1 1 Turning the serial interface echo ON OFF ocooocccccnccncnnnnnncnccnnoncnnnnnnnanccnnancnnns 67 1 1 1 2 Serial DUS Settings ooooccccccccccnconncnccnnnnccnonnnnnnnnncnncnnonnnnnnancnnnnnnnnnnnnnanrannnncnnns 67 1 1 1 3 Setting the transmitter address
12. KLO j2 Ele RKLO RX HI CJ KH RX LOJ 2 KLO HMP228 transmitters 1 to n pieces PXH a PXLO 2 KH 2 KLO 133 nF REQUIRED IF NO DEVICE AT THE END OF THE BUS HMP228 M210282en A Appendix 5 Digital current loop module The digital current loop module has separate lines for transmitting and receiv ing Both single loop wiring and dual loop wiring can be used see figure Dual loop connection makes it possible to have a few more transmitters on the same loop pair A single loop connection has simpler wiring Data transmis sion is achieved by switching the loop current on and off Normally current flows through the loop s even when the HMP228 transmit ter is not on so switching one transmitter off does not affect the other trans mitters on the loop When the wires have been connected correctly the voltage drop from RX to RX is below 2 V If the wires RX and RX or TX and TX are connected incorrectly the voltage drop from RX to RX or from TX to TX is below 1 V and the transmitter does not work Even then the current goes through the loop and the other transmitters can be operated normally When the loop supply is current limited the data lines can withstand short cir cuit to ground and to each other They do not survive connection of supply voltage to the data lines The module must be mounted on the main board in the right direction It can be mounted in the wrong direction or to the wrong pins without breaking
13. Power supply module APPENDIX 3 POWER SUPPLY MODULE 1 INSTALLING THE POWER SUPPLY MODULE occccccccccncnnncncnnnnanananononananononanarararararararararananos 74 2 TECHNICAL SPECIFICATIONS voc imc nenene 76 73 HMP228 Appendix 3 Power supply module M210282en A 2 INSTALLING THE POWER SUPPLY MODULE The mains power connection may be connected to the power supply module only by an authorized electrician A readily accessible disconnect device shall be incorporated in the fixed wiring IEC 950 1 Remove the plastic plug in the transmitter housing and replace it with the cable gland 2 Fasten the power supply module to the bottom of the housing with four Screws 3 Select the correct mains voltage with voltage selector switch 115 230 4 Attach the grounding wire screw M4 and washer to the protective ground terminal on the right hand side of the module 5 Attach the wires from the power supply module to the power terminal on the main board of the transmitter see figure below When the power supply module is on the power on LED is lit NOTE The jumper in connector X3 has to be in position ON otherwise no power is supplied to the transmitter RED BLK from power supply module me update the instrument label with 2 the correct supply voltage label 4 according to the selected operating l gt voltage Du N 4 pcs M3 screws for mounting prefix with fibre washers
14. Rk2 f Udl gt f Uk1 f Uk2 out of range out of range out of range out of range out of range out of range 99 HMP228 Appendix 6 Error messages M210282en A The LEDs display these error types as follows 0000 no frequency at all 0000 a frequency missing from the RH channel 0000 a frequency missing from the T channel The second error type indicates erroneous y values used in internal calcula tions Display Serial bus soi E evalue cub of range E51 T y value out of range coe Wl yal cub of range SER E53 Ul y value out of range The LEDs display these error types as follows OOOO RH channel y value out of range 0000 T channel y value out of range 100 HMP228 M210282en A Appendix 7 Alarm output unit ALARM OUTPUT UNIT The alarm output unit consists of two alarm relays and two opto isolated outputs see Figure 1 The relay output 1 is available at screw terminal X1 and the relay output 2 at screw terminal X2 The opto outputs are activated simultaneously with the corresponding relays and available at screw terminal X5 SELECT ALARM 1ALARM2 SPCO relay outputs X1 X2 max 8A CINONC CINONC
15. TSB 581 581 581 0 20mA_ 226 226 226 226 wav Jo jos ots 0 113 pos vw foses foses 0 565 0 565 FORO VS 11 18 1 m8 A ANA 420mA 1610 16 08 16 05 16 02_ 15 98 0 20mA 1512 15 10 15 06 1502 1498 01v 0756 0755 0 753 0 751 0 749 pos Yo 3 780 3 775 3765 3 755 3 745 o t0w_____ __ 756 755 753 751 749 Table 1 Greenspan s calibration table If the LiCl solution is used or stored in temperatures below 18 C 64 F the equilibrium humidity of the salt solution changes permanently Temperature calibration The temperature channel has been calibrated at the factory and since it is very stable adjustment should be made only when there is strong reason to believe that the adjustments have changed Temperature calibration should be performed against some accurate temperature reference It can be done either using the press switches inside the housing through the serial bus or the menus on the local display Either a one point offset correction or a two point calibration is possible Disconnect the security lock jumper 4 6 1 One point offset correction 4 6 1 1 Using serial commands e Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap prior to calibration e Check the transmitter against the reference e Give command CT lt cr gt e
16. channel2 U voltage output I current output ee eee lower limit of channel 2 ff fff upper limit of channel 2 The bb bbb cc ccc ee eee and ff fff parameters are entered in volts or milli amperes Sets the analogue outputs on channels and 2 An example the voltage output on channel is set to be 0 1 V and channel 2 set to 2 10 V gt AMODE U 01 U 2 10 lt cr gt Chi 0 000 1 000 V Ch2 2 22 000 3 3 10 000 V The current settings can be checked by giving the command without any pa rameters gt AMODE lt cr gt Chi OOOO es 20 000 mA Ch2 0 000 20 000 mA ASEL Selecting the scaling the analogue output quantities Disconnect the security lock jumper ASEL xxx yyy lt cr gt XXX channel I s quantity yyy channel 2 s quantity aw T 46 HMP228 Transmitters M210282en A Appendix 1 Serial commands For example water activity is selected to be output on channel 1 and tem perature on channel 2 the temperature range is scaled to 0 100 C gt ASEL RH T lt cr gt Chl aw lo 0 000 lt cr gt Chl aw hi 1 000 lt cr gt Ch2 T lo 40 000 C 0 lt cr gt Ch2 T hi 160 000 C 100 lt cr gt When the ASEL command is given on its own the transmitter outputs its cur rent settings gt ASEL lt cr gt Chl aw lo 0 000 Ch1 aw hi 1 000 Ch2 T lo 40 000 C Ch2 T hi 160 000 C The outputs and their scales can also be given directly with the A
17. command codes are 0 lit O dark OOOO 0 return to normal state O000 e 1 relative humidity calibration 0060 2 temperature calibration O00ee 3 calibration of analogue outputs ed0e 9 forced auto calibration one auto calibration the security lock jumper must be connected 3 4 Using display keypad commands 3 4 1 Display mode In the display mode the transmitters output measurements on the display dif ferent quantities can be scrolled with the arrow keys The first line is scrolled HMP228 M210282en A Operating Manual with button A and the second line with button W all selections are stored with ENTER The selected quantities appear on the display also after power failure After reset the transmitters are always in the display mode MP 226e 1 04 The display also shows error messages and alarms if they occur He i mb of Pande 3 4 2 Command mode Press the CL key to enter the command mode The first display is the main menu o a Pi ya ym g ode Ser da lo ala raga pa The commands can be scrolled with the arrow keys The currently
18. ooocccccccncccoconococcnnnnnnnnnonnnnccnnnncnnnnnnnanccnnancnnns 68 1 1 1 4 Selecting the output units eee cee ee eee e eee e ee ee aa ee teeeeeeeeeeeaaaaeeneeeeeeeeeaea 69 142 Output Mode S annta aaeoa aeaa a E a A a dees wasabi canes 69 1 1 2 1 Setting the serial interface operation mode 0oooccccncncccoconccoconnnnnnnnonnnanccncancnnns 70 VAIO MS AA A een ee ea ee ede 71 1 1 3 1 Setting the measurement integration time ccceceeeeeee ce ceeeeeeeeeeeeeeeaeaaeeees 71 1 1 3 2 Setting the pressure for mixing ratio calculations ccceceeeeeeeeeeeeeeeee eens 71 Te 323 Setting the date caian pira 72 1 1 3 4 Setting the time cece cece cece ce ee eee ee anes ceeaaaaaaaeeeeeeseaeaaaaaaeeeeeeeeseaaaaaes 72 66 HMP228 M210282en A Appendix 2 Display commands 1 1 DISPLAY COMMANDS The HMP228 transmitter uses a microprocessor therefore its configuration can be set according to the user s needs This is done through commands Most often the commands are used to change the settings of the two analogue channels A full range of commands can be given through the display keypad The commands can be used e g to select and scale the outputs to calibrate the humidity and temperature channels as well as the analogue outputs and to set the serial interface Display keypad commands 1 1 1 Output via the serial bus 1 1 1 1 Turning the serial interface echo ON OFF e Select More in the main menu select More in
19. supply module board Operating temperature range 40 4 45 C Storage temperature range 40 70 C NOTE The power supply module cannot be used if the re gaining option has been activated 76 HMP228 M210282en A Appendix 4 RS 485 422 serial port module APPENDIX 4 INSTALLING AND USING THE RS 485 422 SERIAL PORT MODULE TS INSTALLATION iii aa 78 2 OPERATION 0 ii a 79 3 NETWORK CONFIGURATION c oooonncococcccnnoncnnonnnnnnnnnnnnonnn nene nnmnnn nnmnnn nnmnnn 81 Singl loop Ope atO 0 a e r e a ear a Era aA Ea aa aaa pa Ae aa Eea AA EA AEAEE EES 81 Dual loop Operation xico ii e a Re ee ete ee A 83 4 CHECKING THE SERIAL PORT NETWORK OPERATION 0 c ceeeeeeeeeeeeeeeeeeeeeseeeeeaeeneeeees 85 STOP MOG ioe ess ceed ease A a le eave ia EER 85 POEL MOC cocidos 86 RS 485 Network S ttingS iia 86 5 SPECIFICATION S 00 A AD A A Td dia 87 77 HMP228 Appendix 4 RS 485 422 serial port module M210282en A 1 INSTALLATION Switch the transmitter off Resistors R2 R3 and R4 between connectors X4 and X5 in the component board in the cover of the transmitter are removed with side cutting pliers The module is plugged in connectors X4 and X5 on the main board of the HMP228 transmitter connector X1 on the module board to connector X4 and connector X2 to connector X5 y RX GND TX Jumper selections for the O De O O RS 485 422 serial bus module go Single pair
20. the corresponding LED is lit 101 HMP228 Appendix 7 Alarm output unit M210282en A M3 screws 4 pcs for mounting ribbon cable prefix with fibre washers _ M4 screw and washer for protective ground terminal 2220 8 8 8 replace the plastic plug with cable gland for 7 12 mm cable probe cable gland gt Leal signal cabl gland gable strip wires only 5 mm use arrange signal cable wires so cnmpeg terminal tor ground wire that they do not reach bare AC if stranded wire is used wires when the cover is closed Prefix the fastening screws with fiber washers for mounting the unit to the box NOTE The alarm unit cannot be used with the power supply unit HMP230PW Do not detach the alarm unit from the transmitter when the power is on Do not connect the mains power to alarm unit without grounding the transmitter Setting and activating the outputs with menu commands e Select ALARM in the main menu the following is displayed fuel q 4 oy p mF db m mF E F toe EHH E e
21. 24 vDC IX A Sipplyvoltage 115 230 VAC a 00002 gt gt ERRES Aa 03 2 21 a Ex Probe connections voltage 0 1 Se manual fordetails
22. C in still oil stainless steel filter Sensor Temperature Measuring range Typical accuracy of electronics at 20 C 68 F Typical temperature dependence of electronics Temperature sensor Outputs Two analogue outputs selectable Typical accuracy of analogue output at 20 C Typical temperature dependence of analogue output Serial output 0 02 0 0 9 0 03 0 9 1 0 calibrated against high quality 0 01 0 0 9 0 02 0 9 1 0 10 min HUMICAP thin film polymer sensor part no 19525HM 40 180 C 0 1 C 0 005 C C Pt 100 IEC 751 1 3 class B part no 10429 0 20 mA 4 20 mA 0 1 V 0 5 V 0 10 V 0 05 full scale 0 005 C full scale RS232C M210282en A 5 5 5 6 Electronics User interface Display character height Keyboard Connections Operating voltage option Power consumption of the alarm relays Recommended external load for current outputs 0 1 V voltage output 0 5 and 0 10 V voltage outputs Operating temperature electronics with display cover with power supply module with alarm outputs up to 8A with alarm outputs up to 6A Storage temperature Pressure range of the HMP228 sensor head Mechanics Housing material Housing classification HMP228 Operating Manual 3 keys and 4 LEDs inside the housing or local display keypad 2 x 16 character alphanumeric high contrast wide view angle
23. Chl aw LO OFF 0 000 0 000 CH2 T LO OFF 0 000 0 000 C gt This is an example of the factory setting both alarm outputs are in OFF mode i e not in use The settings can be changed with command ALARM gt alarm al aw HI 9 sul Chl aw HI OFF 0 900 0 100 gt 103 HMP228 Appendix 7 Alarm output unit M210282en A 104 When giving this command first enter the channel number i e the number of the alarm output you wish to use 1 or 2 Then select the quantity you wish to have on that channel aw or T The third parameter HI LO determines whether the alarm is activated when the setpoint value is exceeded HI or not reached LO The fourth parameter is the actual setpoint value which activates the alarm The last parameter is the hysteresis value it indicates how much the measured value has to exceed or go below the setpoint before the alarm is deactivated If the third parameter is HI the alarm is deactivated when the measured value goes below the setpoint with the chosen hysteresis value if the parameter is LO the alarm is deactivated when the measured value exceeds the setpoint with the chosen hysteresis value When the alarm outputs have been set you can activate the outputs with commands ALARM 1 ON channel 1 or ALARM 2 ON channel 2 Note that you can also activate the outputs when giving other parameters with command ALARM Examples of activating the outputs with command ALARM gt alarm 2 T HI 25 5 ON Ch2
24. Figure 2 2 4 Pushing the probe head through the ball valve assembly Open and close the ball valve assembly with the marking groove always in sight When the probe has been pressed through the nut is tightened 50 60 with a fork spanner hexacon 27 mm 7 fitting body i Figure 2 2 4 Tightening the clasp nut NOTE Be careful not to tighten the clasp nut more than 60 as this may result in difficulties when trying to pull the probe head up HMP228 Operating Manual M210282en A 2 2 3 Installing the probe through the ball valve assembly It is recommended that the sensor head is installed in the process through the ball valve assembly Use a 1 2 ball valve assembly with a hole diameter of 14 mm or more With this installation it is not necessary to empty or shut down the process for installing or removing the sensor head If the sensor head is installed in a process pipe please note that the nominal size of the pipe must be at least 1 inch See Figure 2 2 3 1 for detailed instructions probe i handle FH Ly H H E 4 pa mm p ball of the ballvave lt NT hole diameter J 14mm Na Z ers
25. T HI ON 25 000 500 TE gt with commands ALARM 1 ON and ALARM 2 ON gt alarm 1 ON Chl aw HI ON 0 900 0 100 TC gt gt alarm 2 ON Ch2 E HI ON 25 000 5 000 C gt HMP228 M210282en A Appendix 8 Connectors APPENDIX 8 CONNECTORS Tid Connector options iii daa id 106 1 2 Analogue OUtpUts ci daa 106 1 3 Serial connections sirenerne erara oraa e aan ae aer aaa K Ea Eea ara rr EA rE Ear ehU EE EENE ae 107 1 4 Instructions for connecting and mounting the counter pieCes ccceeesseeeeees 108 105 HMP228 Appendix 8 Connectors M210282en A 1 1 Connector options The HMP228 moisture transmitter can be ordered with various connector configurations meaning that the sleeve or plug of the standard transmitter has been replaced with a connector In the following various options and signals FEMALE MALE Figure 1 Connector location 1 2 Analogue outputs Analogue outputs are selected when ordering the transmitter order form has options for 0 20 mA 4 20 mA 0 1V 0 5V and 0 10V They can be connected to a connector If the transmitter is used the HMP230PW power supply module only analogue outputs are connected to the connector If the transmitter is operated with 24 VAC VDC also the power supply is connected t
26. active command flashes the desired command is selected with the ENT key When a menu is displayed either the first command or the currently valid setting flashes The CL key takes the transmitter back to the display mode 3 4 3 Entering numbers When the transmitter needs numbers to be entered into the programme e g when scaling or setting the analogue outputs in calibration or when giving the transmitter an address the field is either empty or the currently valid figure is displayed Any previously given value is deleted with the CL key When the field is empty a cursor blinks on the right side of the display Pressing the arrow keys brings either a blank a comma a dash a full stop or a number from 0 to 9 on the display The right character is selected with ENT after that the number or numbers move left one step Entering numbers is ended with selecting a blank and pressing ENT The last charac ter entered can be deleted with CL If CL or ENT key is pressed when the field 1s empty the programme returns to the previous display With some commands e g calibration figures are changed using the arrow keys When an arrow key is pressed continuously for a while the numbers start changing at an increasing rate The display commands are described in Appendix 2 HMP228 4 2 20 Operating Manual M210282en A 4 MAINTENANCE 4 1 Self diagnostics The HMP228 transmitter goes through a self diagnostics procedu
27. ensure that no free water reaches the bearings 1 2 3 Transformer oil The determination of moisture in oil is an essential part of a comprehensive transformer maintenance program Aging and deterioration increase the capacity of oil to absorb water The primary interest in transformers is to measure the water not in oil but in the cellulosic insulation around the transformer windings Heating and cooling have a considerable effect on moisture levels in oil While temperature raises the paper insulation of transformers tends to loose moisture which is absorbed by the oil surrounding it Saturation level is thus a true indicator of moisture present The HMP228 method provides for a reliable detection of the aging of oil and possible leakages Water activity helps to prevent heavy overloadings and to monitor the transportation of moisture in the transformer HMP228 M210282en A Operating Manual 2 INSTALLATION 2 1 Selecting the place of installation for the probe and the transmitter Select a place which gives a true picture of the process Oil should circulate freely around the sensor a rapid oil flow is recommended Install the sensor directly into the circulation system and not into the oil reservoir because of deposition It is recommended that the sensor head is installed directly in the process through the ball valve assembly When the ball valve assembly is used the pipe does not have to be emptied or shut down for installation or remo
28. same end to the whole network prevents common mode voltages from rising too high over 7 V e Connect wires to the transmitter s serial connector e Check the wiring The following procedure must be repeated with all transmitters e Open the transmitter cover e Pull out the RS 485 422 serial port module if it is already mounted e Set the serial port of the terminal to 4800 baud even parity seven data bits and one stop bit full duplex 4800 E 7 1 FDX RX GND TX we OO sD a X17 e The serial settings of the transmitter must also be 4800 E 7 1 FDX and the transmitter must be in STOP mode If these factory settings have been changed they must be changed back Connect the RS 232C port of the terminal to connector X17 on the top of the main board and switch the power on 81 HMP228 Appendix 4 RS 485 422 serial port module M210282en A 82 e Set the address of the transmitter it can be any number between 1 and 99 In this example the address is 22 gt addr 22 Address 22 e Set the serial bus settings according to your network specifications This setting will become valid after next RESET or power off gt seri 2400 e 7 1 h 2400 E 7 1 HDX e Set the transmitter in POLL mode gt smode poll Serial mode POLL NOTE 1 The SMODE command must be given last NOTE 2 The transmitter outputs no prompt gt after the SMODE POLL command and it only reacts to commands which include its
29. the module it simply does not work then Reverse wiring of RX and RX or TX and TX does not affect the module 91 HMP228 Appendix 5 Digital current loop module M210282en A 3 NETWORK CONFIGURATION Single loop operation Bi directional data on one pair and galvanic isolation are the advantages of the current loop Single pair dual pair use is configured through wiring see figure Supplying power from the same end to the loops prevents crossover voltages e Connect wires to the transmitter s serial connector e Check the wiring The following procedure must be repeated with all transmitters e Open the transmitter cover e Pull out the digital current loop module if it is already mounted e Set the serial port of the terminal to 4800 baud even parity seven data bits and one stop bit full duplex 4800 E 7 1 FDX e The serial settings of the transmitter must also be 4800 E 7 1 FDX and the transmitter must be in STOP mode If these factory settings have been changed they must be changed back Connect the RS 232C port of the terminal to connector X17 on the top of the main board and switch the power on p RX GND TX DIE a AC a Single loop wiring e Set the address of the transmitter it can be any number between 1 and 99 In this example the address is 22 gt addr 22 Address 22 e Set the serial bus settings according to your network specifications This setting will become valid after
30. the lock washer breaks the paint on the housing When mains power supply is used ground the housing with a protective ground wire using a grounding screw on the right side of the power supply module see Appendix 3 for details HMP228 Operating Manual M210282en A 3 1 COMMISSIONING When the HMP228 transmitter leaves the factory its measurement ranges and output signals have already been scaled according to the order form completed by the customer The unit is calibrated at the factory and ready to operate when the power is turned on If you take into use active current voltage or serial bus outputs make these connections first appendix 9 describes them in detail NOTE Make sure that the power is not turned on until cables have been connected to screw terminals In transmitters with display the software version appears for a few seconds when the power is turned on After this measurement results appear automatically Should an error message appear on the display consult Appendix 6 If your transmitter has a blank cover and the LED indicator inside the housing lights up consult Appendix 6 for further information Appendix 7 contains information on how to determine the ranges for alarm outputs and alarm controls when an alarm output unit is used and Appendix 8 describes the use of connectors Changing the parameters If necessary the user can subsequently change the measurement units between metric and non metric an
31. the number can be increased to 9 by using dual loop wiring Current loop settings HMP228 settings Full duplex half duplex HDX Echo on off OFF Terminal settings Line feed after carriage return yes HDX FDX FDX FDX When terminal is set to general lt If gt line feed after lt cr gt carriage return the listings will have two line feeds when also the HMP228 transmitters send line feed M210282en A SPECIFICATIONS Galvanic isolation Loop supply voltage Loop supply current must be current limited Operating loop voltage requirement Loop current Connections on the main board Assembly Board dimensions Operating mode single or dual pair wiring Network network type cable type line length max number of devices data speed operating mode isolation voltage proof Operating temperature Storage temperature HMP228 Appendix 5 Digital current loop module 1500 VAC DC max 1 min 40 V max 20 mA nominal 4 V each transmitter TX TX on the loop 2 V each receiver RX RX on the loop 12 30 mA space 0 2 mA mark 30 mA max Berg sockets screw terminals 0 5 mm wires stranded wires recommended plug in module 40 x 28 mm half duplex serial daisy chain twisted pair 1000 m 3000 ft 6 devices on line single loop 9 devices on line dual loop 4800 baud max polling mode 250 VAC 1 min 40 60 C 40 70 C 97 HMP228 Appendix 6 Error messages M
32. will become valid after next RESET or power off gt seri 2400 e 7 1 f 2400 E 7 1 FDX Switch echo on ECHO E ON Change the serial output mode into POLL gt smode poll Serial mode POLL 83 HMP228 Appendix 4 RS 485 422 serial port module M210282en A NOTE 1 The SMODE command must be given last NOTE 2 The transmitter outputs no prompt gt after the SMODE POLL command and it only reacts to commands which include its address e Check that the transmitter responds to its address gt send 22 aw 0 244 T 29 1 C e Disconnect the terminal e Check that the jumpers in connector X4 are in the right places X1 X2 X4 X4 e Remount the RS 485 422 serial module e Close the cover e Repeat this setting procedure with each transmitter e When all transmitters on the network have been configured switch them off 84 HMP228 M210282en A Appendix 4 RS 485 422 serial port module CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode then the command must include the address of the transmitter If the settings of the transmitter need to be changed the transmitter is switched to STOP mode with command OPEN commands can then be given without address When the line to the transmitter is closed it returns to POLL mode STOP mode Open the line to the transmitter o
33. with the ar row keys and press ENT e the second LED from the left flashes set the high end of channel 1 with the arrow keys and press ENT e the LED on the left flashes set the low end of channel 2 with the ar row keys and press ENT e the second LED from the left flashes set the high end of channel 2 with the arrow keys and press ENT The analogue outputs are calibrated to ensure that outputs are correctly scaled for example when the output is scaled to 4 20 mA the low end of the scale is 4 mA and high end 20 mA exactly However when 0 20 mA output is used the output cannot be adjusted to exactly O mA but to 50 uA When 0 1 V 0 5 V or 0 10 V output is in use the output is adjusted to 50 mV The following table summarizes the correct output values Summary of the correct output values Output scale J ae ee 4 9 Other functions 4 9 1 Adjusting the contrast of the display The contrast of the display can be adjusted using the trimmer LCD display contrast located next to the press switches 4 9 2 Reverting to factory settings of the serial port If the serial port settings are not known no commands can be given via the serial interface The settings can be reverted to the factory settings by inserting a jumper in connector X16 The jumper must be inserted when the power is on 38 HMP228 M210282en A Operating Manual 000 1870707070 SO
34. 0282en A Operating Manual e STEP 3 push the probe head through the ball valve assembly into the process Note that the sensor head must be pushed so deep that the filter is completely inside the process flow L_ MANUAL PRESS TOOL L VALVE OPEN VALVE CLOSED Figure 2 2 3 4 Installing the probe through the ball valve assembly step 3 2 2 4 Mounting the probe directly in the process pipe When the probe is installed directly in a process pipe note that a closing valve is needed on both sides of the installed probe so that the sensor head can be removed from the process for calibration and maintenance HMP228 Operating Manual M210282en A when the probe is pulled capped nut out for maintenance cap TT DIN 9177 M22x1 5 the hole with a capped nut this way the process can 7 SS Sy be open although the probe is not in place 1 sealing welded sleeve G1 2 or tube with thick wall l 77 closing valve ball valve Figure 2 2 4 Installing the sensor head directly in a process pipe 2 3 Signal cabling and grounding 2 3 1 Electrical connections
35. 10282en A Dual loop wiring e Set the address of the transmitter it can be any number between 1 and 99 In this example the address is 22 gt addr 22 Address 22 e Set the serial bus settings according to your system This setting will become valid after next RESET or power off gt seri 2400 e 7 1 f 2400 E 7 1 FDX e Switch echo on ECHO ON e Change the serial output mode into POLL gt smode poll Serial mode POLL NOTE 1 The SMODE command must be given last NOTE 2 The transmitter outputs no prompt gt after the SMODE POLL command and it only reacts to commands which include its address e Check that the transmitter responds to its address gt send 22 aw 0 244 T 29 1 C e Disconnect the terminal e Remount the digital current loop module e Close the cover e Repeat this setting procedure with each transmitter e When all transmitters on the network have been configured switch them off 94 HMP228 M210282en A Appendix 5 Digital current loop module CHECKING THE SERIAL PORT NETWORK OPERATION Normally measurement readings are asked when the transmitter is in POLL mode then the command must include the address of the transmitter If the settings of the transmitter need to be changed the transmitter is switched to STOP mode with command OPEN commands can then be given without address When the line to the transmitter is closed it returns to POLL mode STOP mode Open th
36. 10282en A 4 6 1 2 Using display keypad COMMANAGS ccooocccccnnnccccnnnnnccnnnoncncnnnnnncnnnnnnncccnnnancnnns 28 4 6 1 3 Using LED commands sor canosa ce cee tc Di daban 28 4 6 2 Two point temperature calibrati0N oooooooncccccnnnnccnnnnncccnnnnnnccnnnnnnccnnnnnncnnns 28 4 6 2 1 Using serial COMMANAS Eisernen aaa AAA TEET S nao ata 28 4 6 2 2 Using display keypad COMMAndS ccooonccccnnncccconnnaccnnnoncncnnnnanccnnnnnnccnnnnancnnns 29 4 6 2 3 Using LED COMMANAS cccooocccccnnncccnnnonaccnnnnncncnnnnancnnnnnnncnnnnnncnnnnnncnncnnnanccnns 29 4 6 3 Temperature channel adjustment with Pt 100 simulators ooooncococcccnnccc 30 4 7 Analogue output channels ooommcccoconnncccnnnnncnnnonnnnnnnnnnnn rre 31 4 7 1 Setting the analogue outputs ececeeeee ce eeeeeeeeeeeeeeeeaaeeeeeeeeeeeeeeaaeaeeneeeees 31 ASA LE E AT 32 4 7 1 2 Using display keypad COMMAndS coooonccccnnncccccnnnaccnononcnnnnnnancnnnnnancnnnnnancnnns 33 4 7 2 Selecting and scaling the analogue output quantities oooooocicnnnnnnnonnnnnnn 34 47 251 Using seral output saa dr dances 34 4 7 2 2 Using display keypad COMMAndS coooonccccnnnnccccnnnnccnnnoncnnnnnnnncnnnnnancnnnnnancnnns 34 4 8 Checking and calibrating the analogue Outputs cccccconnnnnnnnnnoncncnnnonannnncnnnnnnnananan 35 4 8 1 Measurement of output currents using test points 35 4 8 1 Calibration of the analogue outputs cc ceceeeeeeeee ee eeeeeeeeeeeeeeeeaaeaeeeeee
37. 11 5 Refl 11 3 lt cr gt Press any key when ready 23 HMP228 Operating Manual M210282en A e Press any key and press lt cr gt when the transmitter requests the second point value RH aD Ref2 yy y lt cr gt 4 3 2 2 Using display keypad commands e Make sure that the sensors of the transmitter and the reference instrument are close to each other Allow enough time for the sensors to stabilize to the measurement conditions e Select Cali in the main menu and then RH cal select Not changed and then one point offset calibration RH 1 point cal Change the humidity reading with the arrow keys to correspond the reference humidity and press ENT pressing an arrow once changes the reading by 0 05 RH Ey 4 3 2 3 Using LED commands e Make sure that the sensors of the transmitter and the reference instrument are close to each other Allow enough time for the sensors to stabilize to the measurement conditions e Connect an ammeter voltmeter to the analogue outputs connector X2 If the outputs are already connected to e g a process computer and you do not want to disconnect them the current output can be measured at separate test points located next to connector X15 see the mother board Give command OOOS At the first calibration point
38. 210282en A APPENDIX 6 ERROR MESSAGES The HMP228 transmitters go through a self diagnostics procedure when the power is switched on When the procedure does not reveal any errors or faults the transmitter starts operating normally If errors or faults are found the transmitter outputs an error message The error messages can be divided into two groups error messages after reset and error messages during operation LED symbols LED dark LED blinking LED lit Errors after reset Display Serial bus E11 CPU EEPROM ackn error cd POE E12 CPU EEPROM csum error E21 PRB EEPROM ackn error n e PRE EEPROM E22 PRB EEPROM csum error ackn error EEPROM is faulty csum error check sum is erroneous The LEDs display these error types as follows 0e00 CPU EEPROM error e000 input hybrid error 98 M2102
39. 5 adapter must be used when calibrating with the HMK13B Calibrator The adapters part no 16611 can be ordered from Vaisala or Vaisala representatives Calibration can be performed by giving the commands using the press switches inside the housing through the serial bus or through the menus on the local display When LED commands are used relative humidity is output instead of water activity When the transmitter is calibrated at two points the points must be either 50 RH or 50 C apart from each other NOTE If the sensor has been changed perform a calibration according to Chapter 4 4 1 21 HMP228 Operating Manual M210282en A 4 3 1 Two point calibration procedure A two point calibration should be performed in stable conditions using saturated salt solutions as references Disconnect the security lock jumper 4 3 1 1 Using serial commands e Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap on the transmitter e Insert the sensor head into the calibration hole of the LiCl chamber of the humidity calibrator e Wait at least 30 minutes e Give command CRH lt cr gt enter the first point value and press lt cr gt gt CRH lt cr gt RH 11 9 Refl yy y lt cr gt Press any key when ready e If you want to see how the sensor stabilizes to the humidity in the calibrator enter c lt cr gt instead of the fi
40. 82en A Errors during operation HMP228 Appendix 6 Error messages Two types of errors are possible during operation of the transmitters The first type indicates that no frequency comes from the converter Display ege f all oul of range ai of CT oul of range of f C RKI pub of range y f REZ out of range ega f C La oul of range otf TC UK oul of range 4e f K2 cub of range Serial bus E40 E41 E43 E44 E45 E47 E48 f all out of range f T f Rk1 f
41. HMP228 Moisture and Temperature Transmitter for Oil USER S GUIDE M210282en A May 2002 is VAISALA PUBLISHED BY Vaisala Oyj Phone 4358 9 894 91 P O Box 26 Fax 358 9 8949 2227 FIN 00421 Helsinki Finland Visit our Internet pages at http www vaisala com Vaisala 2002 No part of this manual may be reproduced in any form or by any means electronic or mechanical including photocopying nor may its contents be communicated to a third party without prior written permission of the copyright holder The contents are subject to change without prior notice HMP228 M210282en A Operating Manual Contents 1 PRODUCT DESCRIPTION cooocccccccooconcancnncnoncononnannnnnrrnro nacer rencia 1 1 1 General characteristics ui ia 1 1 2 Typical applications si ccccccccccccies codes seneececcesenaccebseccccteneececcssvececdecesucdubeseccateaencecessvecces 1 1 2 1 About the method used for measuring moisture in oil 1 1 2 2 Lubrication oil in paper Machines 0 ee eee eee eeee ee ee eee ee eeeeeeeeeeeeeeeeeeeneees 2 1 2 3 TVAMSTOFMOR Ol eiaa T ted dinar a EATA Saa re ted Deo S EE 2 2 gt INSTALLATION o ei 3 2 1 Selecting the place of installation for the probe and the transmitter 3 2 2 A cccceanececteaser ccccesgeseteutescecae ts etelansescccaassescteussveccceteeeedeuds 4 2 2 3 Installing the probe through the ball valve assembly 6 2 2 4 Mounting the probe directly in the process Pipe
42. If the settings need to be changed press CL the quantity starts blinking it can be changed with arrow switches and acknowledged with ENT 102 HMP228 M210282en A Appendix 7 Alarm output unit the third parameter in this example HI ON starts blinking This parameter determines whether the alarm output is in use or not and when it is activated The selection is acknowledged with ENT The options are the following HI ON the alarm is activated by exceeding the setpoint the output is in use LO ON the alarm is activated if the value goes below the setpoint the output is in use HI OFF the alarm is activated by exceeding the setpoint the output is not in use LO OFF the alarm is activated if the value goes below the setpoint the output is not in use the setpoint starts blinking in this example 20 00 if you wish to change it press CL and enter the new setpoint the hysteresis value starts blinking in this example 5 00 if you wish to change it press CL and enter the new value NOTE The options HI OFF and LO OFF are used to deactivate the relay outputs e g for service purposes The settings of the channel 2 are changed in the same way Setting and activating the outputs using an RS line ALARM lt cr gt or ALARM n ON lt er gt where n channel number 1 or 2 The currently valid settings of the alarm output unit can be checked with command ALARM gt alarm lt cr gt
43. LCD 3 85 mm 0 15 1 x 4 keypad screw terminals 0 5 mm2 wires AWG 20 stranded wires recommended 24 VDC isolated 24 VAC 20 28 V 115 230 VAC with power supply module 100 mA maximum 24 VDC 55 mA max 24 VDC lt 500 Q gt 2 kQ to ground gt 10 kQ to ground 40 60 C 0 50 C 40 445 C 40 445 C 40 60 C 40 70 C 0 40 bar G AIS112 DIN 1725 IP 65 NEMA 4 41 HMP228 Operating Manual M210282en A Bushing for 7 10 mm diameter cable 8 x 0 5 mm shielded cable Sensor protection Stainless steel filter part no HM46999 Housing dimensions 145 x 120 x 65 mm Sensor head dimensions see Figure length 170 mm Y 13 5 mm Probe pushed down Probe up jae Parallel thread sie _7 Tapered thread z LI 2 g 8 a i lt x H 13 5 Sipi E 3 A Probe 180mm adusien ra Ce 12 range 120mm Y Probe 400mm adjustment range 340mm Cable diameter 5 5 mm Weight without display cover and power supply module With 2 m cable 1300 g With 5 m cable 1600 g With 10 m cable 2100 g Weight of display cover 420 g Weight of power supply module 240 g 42 HMP228 M210282en A Operating Manual 5 7 Electromagnetic compatibility The emission and immunity tests have been performed according to thestandard EN61326 1 1997 Am1 1998 Industrial environment 5 7 1 Emissions Tes
44. MON LOOP HMP228 transmitter Controller Pz p e D x ox A y 2 24 VAC A shared common line HMP228 transmitter Figure 2 3 2 Connecting the transmitter to an AC supply HMP228 Operating Manual M210282en A 2 3 3 Grounding A single electrical cable with a screen and three to ten wires is recommended for power and analogue output serial bus connections The cable diameter should be 7 10 mm The screen of the electrical cable must be grounded properly to achieve best possible EMC performance Recommended cable shield is done in the cable gland as shown e remove the brass disks rubber ring and nut from the transmitter housing e strip 165 mm of the cable insulation but leave 25 mm of the braid visible e slip the nut and rubber ring over the cable insulation e slip the brass disk that has the bigger hole in it over the braid so that it rests against the cable insulation slip the other brass disk over the wires to the middle of the braid flexible wires 0 5 mm2 AWG 20 stranded wires recommended ata 165 JN WALA mee shielding tube brass brada E 1 brass disks Ha rubber ring gt nut TT i 1 a E a D 7 10 mm y cable Ifthe cable diamete
45. MP228 transmitter dynamic line adapter 120 ohm resistor in series with a 33 nF capacitor or line master If a branch line is made with a junction box the branch should be shorter than 3 meters When connecting the device follow the instructions given in the figure in Chapter 1 SINGLE LOOP WIRING TWISTED PAIR WIRING HOST COMPUTER KH ja VVS AOS Y o PKH E a a io aa KLO 2 NNSA NINY SILA PXLO RX HI fy 2 XH gt lt 2 HMP228 transmitters 1 to n pieces Jo PXH 2 PXLO KH KLO NOTE DYNAMIC LINE TERMINATION 120R REQUIRED IF NO DEVICE AO nF AT THE END OF THE BUS J DUAL LOOP WIRING TWISTED PAIR WIRING HOST COMPUTER XH 7 XH KLO 7 PXLO RX HIO 2 KH RX LOJ 2 KLO HMF228 L transmitters 1 to n pieces PXH 2 XLO 2 KH 2 XLO e Z 120R 33 nF NOTE DYNAMIC LINE TERMINAS JON REQUIRED IF NO DEVICE 5783 nF AT THE END OF THE BUS al 79 HMP228 Appendix 4 RS 485 422 serial port module M210282en A 80 The RS 485 422 module has separate lines for transmitting and receiving but they can be connected together with jumpers Dual loop connection i
46. RH 11 5 Refl c lt cr gt RH 11 5 Refl 11 3 lt cr gt Press any key when ready e Insert the sensor head into the calibration hole of the NaCl chamber of the humidity calibrator e Wait for 30 minutes e Press any key enter the second point value and press lt cr gt RH 75 5 Ref2 yy y lt cr gt e The stabilization of the sensor can be monitored by entering c lt cr gt instead of the reference value 4 4 1 2 Using display keypad commands e Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap on the transmitter e Insert the sensor head into the calibration hole of the LiCl chamber of the humidity calibrator e Wait for 30 minutes 25 HMP228 Operating Manual 4 4 1 3 M210282en A Select Cali in the main menu and then RH cal select Sensor changed Change the first point reading with the arrow keys and press ENT Insert the sensor head into the calibration hole of the NaCl chamber of the humidity calibrator Wait at least 30 minutes If necessary change the second point reading with the arrow keys and press ENT Using LED commands Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap on the transmitter Insert the sensor head into the calibration hole of the LiCl chamber of the humidity calibrato
47. SEL com mand ASEL xxx yyy aaa a bbb b ccc c ddd d lt cr gt XXX channel I s quantity yyy channel 2 s quantity aaa a lower limit of channel 1 bbb b upper limit of channel 1 cec c lower limit of channel 2 ddd d upper limit of channel 2 ASCL Scaling the analogue outputs Disconnect the security lock jumper ASCL lt cr gt Scales the outputs selected on channels 1 and 2 For example scaling water activity on the range of 0 1 00 and temperature 40 160 C gt ASCL lt cr gt Chl aw lo 0 000 lt cr gt Chl aw hi 1 000 lt cr gt Ch2 T lo 0 000 C 40 lt cr gt Ch2 T hi 100 000 C 160 lt cr gt 47 HMP228 Transmitters Appendix 1 Serial commands M210282en A The output scales can also be given directly with the ASCL command ASCL aaa a bbb b ccc c ddd d lt cr gt aaa a lower limit of channel 1 bbb b upper limit of channel 1 ccc c lower limit of channel 2 ddd d upper limit of channel 2 For example water activity is scaled to 0 1 00 on channel 1 and temperature to 40 100 C on channel 2 gt ASCL O 1 40 100 lt cr gt Chl aw lo 0 000 Chl aw hi 1 000 Ch2 T lo 40 000 C Ch2 T hi 100 000 C 48 HMP228 Transmitters M210282en A Appendix 1 Serial commands CALIBRATION COMMANDS CRH Relative humidity calibration Disconnect the security lock jumper With this command the transmitters can be calibrated against a reference A one point calib
48. SS OKO 000090 40800 00 00 Q Ch1 Ch2 Current loop or RS485 module i i 9 EEN Se Sensor connectia f Figure 4 9 2 Forcing the serial port settings back to factory settings When the jumper is inserted the serial line factory settings become valid but only temporarily The transmitter must be given new settings otherwise the transmitter uses the old unknown settings after power up When the new settings have been given the transmitter must be reset The jumper must be removed before the transmitter is reset if the jumper is in place when power is turned on the transmitter does not work After jumper insertion the transmitter is in STOP mode ready to receive commands The same method is used when the transmitter is in POLL mode and the user has forgotten its address CAUTION Inserting a jumper in any other place in connector X16 voids the guarantee of the transmitter 39 HMP228 Operating Manual 5 1 5 2 5 4 40 TECHNICAL DATA Water activity Measuring range of water activity M210282en A 0 1 Accuracy including nonlinearity and repeatability maximum achievable accuracy when calibrated against high quality when calibrated against salt solutions ASTM E104 85 maximum achievable accuracy when certified humidity standards Response time 90 at 20
49. a sic 92 Single lOOp Witkin g ioe cos raaa a toes aa Taaa arara dd 92 Dualil00p OperatioN ciiccoioocicncinocnanaiiocin nacen ice cd eettecauecctacgasecdecadesctuecasectucadseetiugseeceseatescet 93 DUalllo OP WIFI Ocio cian T edeatune lt aceacauerees 94 4 CHECKING THE SERIAL PORT NETWORK OPERATION 0 cccececeeeeeeeeeeeeeeeeeeeeeeaeeneeneeeees 95 ST OP MOG E E sce sv E ati 95 POLE MOE ii A ccc cat at eases ccc tuae E esses es acuveauan T 96 Current loop SeCttiNGS iii ADA aea aa aeaa Enean 96 5 SPECIFICATIONS cutres 97 88 HMP228 M210282en A Appendix 5 Digital current loop module 1 INSTALLATION Switch the transmitter off Resistors R2 R3 and R4 between connectors X4 and X5 in the component board in the cover of the transmitter are removed with side cutting pliers The module is plugged in connectors X4 and X5 on the main board of the HMP228 transmitter connector X1 on the module board to connector X4 and connector X2 to connector X5 p RX GND TX Ce ea o yO X17 gt Currentloop 28 o module Connect the data wires to screw terminal X6 on the main board Switch the power on 89 HMP228 Appendix 5 Digital current loop module M210282en A 90 OPERATION The HMP228 transmitters can either be given an address or operated without an address Both single and dual loop wiring with half duplex connection can be us
50. address e Check that the transmitter responds to its address gt send 22 aw 0 244 aw T 29 1 C e Disconnect the terminal e Check that the jumpers in connector X4 are in the right places X1 X2 X4 X4 e Remount the RS 485 422 serial module e Close the cover e When all transmitters on the network have been configured switch them off M210282en A HMP228 Appendix 4 RS 485 422 serial port module Dual loop operation The following procedure must be repeated with all transmitters Open the transmitter cover Pull out the RS 485 422 serial port module if it is already mounted Set the serial port of the terminal to 4800 baud even parity seven data bits and one stop bit full duplex 4800 E 7 1 FDX The serial settings of the transmitter must also be 4800 E 7 1 FDX and the transmitter must be in STOP mode If these factory settings have been changed they must be changed back Connect the RS 232C port of the terminal to connector X17 on the top of the main board and switch the power on When dual loop is used the jumpers in connector X4 on the module board must be as shown below X4 X4 Set the address of the transmitter it can be any number between 1 and 99 In this example the address is 22 gt addr 22 Address 22 Set the serial bus settings according to your system This setting
51. alogue outputs connector X2 Give command OOO At the first calibration point the LED on the left flashes adjust the first point offset with the arrow switches to the value given in the calibration table Chapter 4 4 5 and press ENT switch Insert the sensor head into the calibration hole of the NaCl chamber in the humidity calibrator Wait at least 30 minutes Check that the reading corresponds within the desired accuracy to the value given in the calibration table Chapter 4 4 5 If not adjust the second point with the arrow switches to the correct value and press ENT At the second calibration point the second LED from the left flashes One point calibration procedure A one point correction can be done manually in the field against an accurate reference but it is always recommended to perform a two point calibration 4 3 2 1 Disconnect the security lock jumper Using serial commands Make sure that the sensors of the transmitter and the reference instrument are close to each other Allow enough time for the sensors to stabilize to the measurement conditions Give command CRH lt cr gt enter the humidity value and press lt cr gt gt CRH lt cr gt RA S es Ref1 yy y lt cr gt Press any key when ready If you want to see how the sensor stabilizes to the humidity in the calibrator enter c lt cr gt instead of the first reference RH 11 9 Refl c lt cr gt RH x 15 Rett 2 0 lt Ccr gt RH
52. an be filtered out the transmitter calculates the average of a number of measurement cycles defined by the user e Select More in the main menu select More in the More menu and select M tim in the second More menu cho Mitin e Pressing ENT returns the programme to the main menu without changing the integration time e If the integration time needs to be changed press CL enter the new integration time with the arrow keys 4 255 ALM pi E 1 1 3 2 Setting the pressure for mixing ratio calculations The atmospheric pressure has an effect on mixing ratio Therefore accurate calculations can be achieved only when the ambient pressure is taken into consideration e Select More in the main menu PeSSUP Ga e Select Pressure ressur i TBS da e Pressing ENT returns the programme to the main menu without changing the pressure reading e Ifthe pressure needs to be changed press CL enter the new pressure with the arrow keys 71 HMP228 Appendix 2 Display commands M210282en A 1 1 3 3 Setting the date e Select More in the main menu select Date in
53. annels 4 7 1 Setting the analogue outputs The HMP228 transmitters can be ordered with the required current or voltage outputs already selected If the outputs need to be changed move the jumpers in connector X15 into positions as shown in Figure 4 7 1 2 Spare E jumpers f el X55 Current loop or na RS485 module Sensor connectio i Figure 4 7 1 1 Spare jumpers HMP228 Operating Manual 5 Schiche 50 060650 Current outputs OOOO 0 20 4 20 mA 5 chich2 M210282en A Voltage outputs O 5 0 10 V 00000 OOOO CHK COR A A SER X15 Voltage outputs Current loop or 0 1 V RS485 module 5 6 chich2 EE gooo Ch1 0 1 voltage ouput ARA Chi Ch2 ensor connecti es OCW OOOO Ch 2 current output Figure 4 7 1 2 Selecting the analogue outputs with jumpers All jumpers are used only with the 0 1 V outputs When other outputs are in use the spare jumpers are kept in connector X55 4 7 1 1 Using serial output Disconnect the security lock jumper AMODE a bb bbb cc ccc d ee eee ff fff lt cr gt a channel 1 U voltage ou
54. arts flashing acknowledge the upper limit with ENT or start changing it by pressing CL a new upper limit is given one character at a time with the arrow keys When channel 1 has been set the programme goes on to channel 2 the procedure is the same as with channel 1 Ch ME a HEH AS E E E Ba GE Ear 33 HMP228 Operating Manual M210282en A 4 7 2 Selecting and scaling the analogue output quantities Disconnect the security lock jumper 4 7 2 1 Using serial output ASEL xxx yyy lt cr gt XXX yyy channel 1 s quantity channel 2 s quantity Aw T Example water activity is selected on channel 1 and temperature on channel 2 gt ASEL aw T lt cr gt Chl aw lo 0 000 aw lt cr gt Chl aw hi 1 000 aw lt cr gt Ch2 T lo 40 000 C lt cr gt Ch2 T hi 160 000 C 2 lt cr gt ASCL lt cr gt Example water activity is scaled on the range of 0 1 Aw and temperature 0 100 C gt ASCL lt cr gt Chl Aw lo 0 000 Aw lt cr gt Chl Aw hi 1 000 Aw lt cr gt Ch2 T lo 40 000 C 2 0 lt cr gt Ch2 T hi 160 000 C 100 lt cr gt 4 7 2 2 Using display keypad commands Disconnect the security lock jumper e Select Mode in the main menu and Analog outputs in the Mode menu Mode i mm 4 Scale
55. be used see Chapter 4 If you wish to take into use variables that are not included in the configuration of your transmitter contact Vaisala for more information 3 1 2 Commands and security lock jumper In order to prevent any tampering with the transmitter settings the transmitters cannot be calibrated the analogue outputs set or the analogue output quantities selected or scaled unless the security lock jumper has been disconnected The commands involved are e serial commands CRH CT FCRH ACAL AMODE ASEL ASCL e all LED commands e display keypad commands Cali gt RH T Analog outputs Mode gt Analog outputs gt Mode Scale In the following the description of these functions is preceded with a reminder of the security lock jumper Disconnect the security lock jumper HMP228 Operating Manual M210282en A 3 2 Using the RS 232C serial bus Rx GND Tx Z Rx 2 GND f l Tx Current loop or gt RS485 module l INC Figure 3 2 1 Serial bus connections To connect a PC to the HMP228 transmitters via the RS 232C serial bus one of the following cables is required The type of cable depends on the terminal and the connector type 2 Sg XD TX 5 GND 3 RX D9S ds AXP 6 end gt PC orci 3 a m TX 7 m GND HMP228 Axe mm RX 3mm lt q
56. cccnnniccnnns 53 ERRS Outputting error Messages cccccccnonccnccnnnoncnnnonnancnnnnnnonnnnnnanncnnnnnnnnnnanancannnnncnnns 53 ECHO Turning the serial interface echo ON OFF oococccccccnccnnnonocnncnnnnnnnnnnnanccnnnnncnnns 54 INTV Setting the output interval for the RUN sStatO ooocicnnnnccononoccccnncnncnnnonncncinnnnncnnns 54 FORM Setting the output forMat oooococonnconnccccnnnoncnnnonnnnccnnnnnnnnnnnnancnnnnnnnnnnnnnanccnnnnncnnns 55 FTIME AddingtiMeto Output a il Pla pa 56 FDATE Adding date to Outubro tattoo da it 56 SERI Serial DUS SettiNngS cece cece cece cece ee ace eee teeter ee ee nn nn nnnnan cnn nn nn cnn rr nn 57 UNIT Selecting the Output units cce cece cece eeeeee cece ee ee ee ae aa eeeeeeeeeeeeaeaaaaeeeseseeeeaeaaea 58 ADDR Setting the transmitter addresS oooooooccccccnciccnnnccnconnnnnoncnnnnnncancnn cn cnn nnnanannanno 58 RESET Resetting the transmitter 0 cccccceceeeeeeeeeeeeeeeee ae aaa teeeeeeeeeaeaaeaneeeeeeeeeaeaaea 59 ST OPSratlOMiMOdeS E tend tada 59 SMODE Setting the serial interface ccc ceeceeeee cece eee eeeeeeeeeeeeeeeaaeaeeeeeeeeeeeaeneeeees 59 OPENS CLOSE tice pet ieee tolva te aang 60 A OTHERS ci cceetag enh ea e du cevecsecevctiddedestudecesedldecdstiveeseventdgess tise aa a aaan 61 ITEST Testing the analogue outputs ooooooccccnncoccnononncnccnnnnncnnnonnanccnnnncnnnnnanancennanncnnns 61 MTIM Setting the measurement integration time cc ceeeeeeeee cece
57. commands M210282en A NOTE The serial bus settings become effective only after reset When the half duplex mode is set it will automatically turn the echo off Even then the ECHO command can indicate that echo is on UNIT Selecting the output units UNIT x lt cr gt Xx mQ etric units n on metric units metric _ non metric For example the command for setting the non metric units is gt UNIT N lt cr gt Output units non metric When the command is given with no parameters the transmitter outputs the currently valid setting ADDR Setting the transmitter address ADDR aa lt cr gt aa address 0 99 The address is used when more than one transmitter is connected to one serial bus The ADDR command makes it possible to communicate with one transmitter at a time in POLL state For example transmitter is given address 99 gt ADDR lt cr gt Address 2 2 99 lt cr gt 58 HMP228 Transmitters M210282en A Appendix 1 Serial commands When asking the current address no address number is given gt ADDR lt cr gt Address 2 lt cr gt RESET Resetting the transmitter RESET lt cr gt Resets the transmitter All settings that have been changed stay in the memory even after reset or power failure Operation modes SMODE Setting the serial interface SMODE xxxx lt cr gt xxxx STOP RUN or POLL In STOP mode measurements output only by command all commands can be use
58. d In RUN mode outputting automatically only command S can be used In POLL mode measurements output only with command SEND When in POLL mode the output state is changed as follows OPEN aa lt cr gt SMODE xxxx lt cr gt aa address of the transmitter xxxx STOP RUN or POLL The OPEN command sets the bus temporarily in STOP MODE so that the SMODE command can be given For example gt SMODE lt cr gt which mode is in use at the moment Serial mode STOP gt SMODE STOP lt cr gt setting STOP mode Serial mode STOP 59 HMP228 Transmitters Appendix 1 Serial commands M210282en A 60 OPEN amp CLOSE OPEN nn lt cr gt nn address of the transmitter 0 99 CLOSE lt cr gt In STOP mode command OPEN has no effect CLOSE sets the transmitter in POLL mode In POLL mode command OPEN sets the transmitter temporarily in STOP mode command CLOSE returns the instrument to POLL mode When more than one transmitter is connected to the same serial bus the POLL mode makes it possible to communicate with the transmitters For example a relative humidity calibration is performed at transmitter 2 lt bel gt ASCII 7 gt OPEN 2 lt cr gt lt cr gt lt 1f gt HMP nn line opened for operator commands lt cr gt lt 1f gt lt 1f gt lt bel gt gt CRH lt cr gt gt CLOSE lt cr gt lt cr gt lt 1f gt line closed lt cr gt lt lf gt HMP228 Transmitters M210282en A Appendix 1 Serial comman
59. d select and scale the output signals with software functions This is done through commands either utilizing the menus on the local display or giving commands through the serial interface see Appendices Most often the commands are used to change the settings of the two analogue channels A limited range of commands can be given with the three press switches up down enter inside the transmitter housing There are four LEDs to indicate the commands given with the up and down switches All HMP228 units incorporate these switches and LED indicators LED commands can be used to calibrate the transmitters both humidity and temperature or to calibrate the analogue outputs If you need to change some functions read the following chapters carefully 3 1 1 Security lock jumper Before the settings can be changed the user must first remove the security lock jumper in connector X15 see Figure 3 1 1 The security lock jumper HMP228 M210282en A Operating Manual makes it impossible to change the transmitter settings by mistake The jumper should be removed only for changing the settings and for calibration POU OOOO O O ES y OO o 3 Change of settings disabled Current loop or RS485 module Figure 3 1 1 Location of the security lock jumper When the security lock jumper is connected some commands cannot
60. ds OTHERS ITEST Testing the analogue outputs ITEST lt cr gt or ITEST a b lt cr gt a current voltage of channel 1 b current voltage of channel 2 The operation of the analogue outputs can be tested by forcing the outputs to given values which can then be measured with a current voltage meter from the analogue outputs The response to ITEST command gives six out puts parameters Only the first two are relevant they show the channel current or voltage in mA or V The other four figures contain information for service purposes only Examples e reading the channel outputs and parameters gt itest lt cr gt 1 9438 2 3483 1 00694 10 64634 1 97374 2 17665 gt e forcing outputs 0 5 V and 4 V to channels 1 and 2 gt itest 0 5 4 lt cr gt 0 5000 4 0000 1 00694 10 62970 1 23336 3 01722 gt e releasing the forced control and reading the outputs gt itest lt cr gt 1 9427 2 3392 1 00731 10 62428 1 97157 2 16978 gt 61 HMP228 Transmitters Appendix 1 Serial commands M210282en A MTIM Setting the measurement integration time MTIM nnn lt cr gt nnn number of cycles measured 4 255 By lengthening the measurement integration time any stray changes in the out put can be filtered out the transmitter calculates the average of a number of measurement cycles defined by the user The command can be given in two ways gt MTIM lt cr gt Mtim 4 5 lt cr gt or gt MTIM 5 lt cr gt Mt
61. e salt solutions Os AA A al Power supply 24 VDC standard 24 VAC see Chapter 2 3 2 115 230 VAC RS 232C standard RS 485 422 current loop Display cover cover with or without local display amp keypad not with 115 230 VAC power supply Cable length 2 5 or 10 metres Cable connectors for 24 VDC supply for analogue outputs for RS 232C line and for RS 485 single loop line see Appendix 8 for details Typical applications 1 2 1 About the method used for measuring moisture in oil The HMP228 transmitter measures water in oil in terms of water activity aw which can be determined as follows water activity indicates the amount of oil in the scale of O 1 aw In this scale 0 aw is an indication of completely water free oil and 1 aw an indication of oil fully saturated with water Water is present in free form The most important feature which distinguishes the measurement of water activity aw from the traditional measurement of absolute water content in HMP228 Operating Manual M210282en A ppm is that the saturation point remains stable regardless of the oil type or the aging of oil additives used etc As water activity exceeds 0 9 aw in any system there is a risk for segregation especially if the temperature decreases The water activity is used for alarming at the point of gt 0 9 aw that the risk for free water in the system is obvious The most important advantages of this system are the fact that water activ
62. e line to the transmitter open 22 lt cr gt HMP 22 line opened for operator commands Transmitter no 22 is now temporarily set to STOP mode it accepts com mands without address until CLOSE command is given Individual settings can now be easily modified Do not open more than one line at a time Use command to find out the settings of the active transmitter lt cr gt HMP228 1 01 CPU serial nr 0 Keyboard type 0 Address E 7 Output units metric Baud P D S 4800 E 7 1 FDX Serial mode i STOP Output intrv 0 min Mtim 32 Pressure 1013 25 Analog outputs Ch1 DEDO A 10 00 V Ch2 ODO e 10 00 V Ch1 aw lo 0 000 Ch1 aw hi 1 000 Ch2 T 3 lo 20 000 C Ch2 T hi 180 000 C Transducer PRB serial nr 0 Calibr date 0 When the necessary settings have been given close the line to transmitters the command closes all open lines gt close line closed CLOSE command is always given without address If no lines are open there will be no response to the CLOSE command 95 HMP228 Appendix 5 Digital current loop module M210282en A 96 POLL mode If a transmitter has been set to POLL mode it will respond only to commands which include its address send 22 aw 0 244 T 29 1 C Addresses from 1 to 99 can be used According to the 20 mA current loop standard current flows with no transmission on line A maximum of 6 devices can be connected on same single loop line but
63. ed No address is needed when only one HMP228 transmitter is used when several transmitters are connected to the same line each transmitter must be given an address in the initial configuration A current loop must get its operating voltage from the master or it can have its own floating power supply capable of supplying 15 40 V and 20 30 mA Unregulated AC DC adapter can be used if the current is limited to 20 mA at least by a serial resistor Note The host computer can restrict the loop supply voltage that can be used see computer specifications The serial line structure is a serial interfaced chain daisy chain At one end of the serial line there must be a HMP228 transmitter and at the other end a line master A branch line can be made with a junction box SINGLE LOOP WIRING TWISTED PAIR WIRING HOST COMPUTER XH 7 Di PXH XLO 7 EJ PXLO RX HI 2 XH RX LOZ Mo xo HMP228 transmitters 1 to n pieces a Di PXH J RKLO Jo xH Ja xo NOTE DYNAMIC LINE TERMINATION Se 120R REQUIRED IF NO DEVICE A SSE AT THE END OF THE BUS c DUAL LOOP WIRING TWISTED PAIR WIRING HOST COMPUTER XH a Jl RKH
64. ee eetteeeeeeeeeeeeaeaaea 62 PRES Setting the pressure for mixing ratio Calculations cceeeeeeeeeeeeeeeeeeeeeeeeee 62 XPRES Setting the pressure for mixing ratio calculations temporarily 63 CDATE Entering calibration date oooonccidiciciciconnccncnnnnncnnnonanancnnnn nc cnn n nan cr rra n nc cnn 63 DATE Setting edad ii iia 63 PIME Setting the sth MC im ita 64 VERS Name and version of the programme cceeceeeeeeeeeeeeeeeaeaeeeeeeeeeeeeeseaaeaeenees 64 Outputting the transmitter SettidQS oooocidinnninnconnnnccnconcnncnnnnnncnncnncnnnnnnnnnanccnnnnncnnns 64 2 Outputting the transmitter settings also in POLL mode ccceeeeeeeeeeeeeeeeeee 64 FILT Setting the averaging time 0ccccceeeeeeeeeeeeeeeeeeeeeaeaeeaeeeeeeeeeeseaaaaeeeeeeeeeaeaaea 65 The commands function as described when the serial interface is in full duplex mode and echo is on All commands except FORM can be given in either capital or small letters In the commands lt cr gt means carriage return lt lf gt line feed and lt ht gt hori zontal tabulation 45 HMP228 Transmitters Appendix 1 Serial commands M210282en A ANALOGUE OUTPUT COMMANDS AMODE Setting the analogue outputs Disconnect the security lock jumper AMODE a bb bbb cc ccc d ee eee ff fff lt cr gt a channell U voltage output I current output bb bbb lower limit of channel 1 cc ccc upper limit of channel 1 d
65. eeeeeees 46 ASEL Selecting the scaling the analogue output quantities 0 eeeeeeeeeeeeeeeeeees 46 ASCL Scaling the analogue outputs 0 ccceeeeeceeeeeeeeeeeeeeeeaeaaeeeeeeeeeeeeaeaaeeneeseeeees 47 2 CALIBRATION COMMANDS cccoooocccncononnnnanconnannnnnrn nro 49 CRH Relative humidity calibration ccccceceeeceee ee ae ee eeeeeeeeeeeeeeaaeaeeeeeeeeeeeeaaaaeeees 49 FCRH Relative humidity calibration after sensor Change cceeeeeeeeeeeeeeeeeeeeaeee 49 CT Temperature cCalibration 00 ccccccccceeceeeeeeeeeeeeeeaeaaeeteeeeeeeeeaeaaaaceneeeeeeeeeaaaaeenees 50 ACAL Calibrating the analogue outputs ooooooocccnccnccncnnnnonnoncnnnoncnnnnancnnnnncnnnnnnnanannnnnos 51 L Outputting linear correction CoefficientS o noonoonccccicccncincnonenccnnnancnnonnnnnnancnnnancnnnns 51 LI Entering linear Correction COeffiCientS ooooocononcccninoccnnnnnonnnnnonnnnnnnnnnrrnnnnnnnrnnnnnnn 51 3 OUTPUT VIA THE SERM L BUS a aeaee ded aaa e ie ncccdsachesvectacceccadechs ved sacccccctetasvendaccccceaoctszes 52 R Starting the measurement QOUtpUt ooooooncnccnccoccnnnonncnccnnnnnnnnnonncnccnnnnnnnnnnanancennnncnnnns 52 S Stopping the measurement output cccccccccccnoncccccnnnnccnnnonncnccnnnnncnnnnnnanccnnan cn nnnnnnanes 52 SEND Outputting a reading ONCB oocoooccccnncoccnnnnnnccconnnnnnnnnnnnancnnnnn corn nnnnancra nan cnnnnnnnanes 53 DSEND Outputting readings of all connected transmitters ONCE ooooccccccncc
66. ees 36 4 8 1 1 Using serial COMMANAS ooooccccconnccccnonoccnnnnnacononnnnccnnnnnncnnnnnanccnnnnanccnnnnanicnns 37 4 8 1 2 Using display keypad COMMAndS ccooocccccnnncccnonnnnccnononccnnnnnanccnnnnancncnnnancnnns 37 4 8 1 3 Using LED commands scenos a AA ASE 38 4 9 A E E E T A E T 38 4 9 1 Adjusting the contrast of the diSplaY ccooooonccccnonncccnnnnnccnnnnnnccnnnnnnccnnn canon 38 4 9 2 Reverting to factory settings of the serial POrt 0 0 eeeeeeneeeeeeeteeeeeees 38 5 TECHNICAL DAT A uri 40 5 1 Water activity aiii A A ea eee 40 5 2 TOMPerat Ue cc ideada 40 5 4 Analogue QU DUES cuero ii 40 5 5 Electro A E errr 41 5 6 Mechanics o a Si ete ee eit 41 5 7 Electromagnetic Compatibility 0 cceeeeceeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeeeseeeeeeeeeeeeeees 43 5 7 1 EMISSIONS wisi i os e a eA oo 43 5 7 2 IMMUNITY wwe ee eee Al ie ae ee ee a ee ees 43 Ge OPTIONS wesszie eect E E teas sae ccecxeandcade dd 44 fz OPARE PARTS ii as 44 APPENDIX 1 SERIAL COMMANDS occcccccccoonncnnconcnnnnono nana rn 45 APPENDIX 2 DISPLAY COMMANDG 21c ccceceeeeeeeeeeeeee eee eeeeeeeeaa nana rr rr nr rr 66 APPENDIX 3 POWER SUPPLY MODULE cooooncccccccccccnononnnncnnononononononnnnnrnnnr cnn anne rra 73 APPENDIX 4 INSTALLING AND USING THE RS 485 422 SERIAL PORT MODULE 77 APPENDIX 5 INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE 88 APPENDIX 6 ERROR MESSAGES oncccccccccoconnnnconennnnnnnnnnnnnn
67. en A 1 4 Instructions for connecting and mounting the counter pieces The counter piece has to be grounded as shown in Figure 1 4 in order to maintain a complete EMC protection The recommended cable is a shielded cable with an outer diameter of 4 6 mm e g PFSK 6 x 0 22 mm bend the sheath over the pole piece no strands on the Oring wire connections be N see tables Oring BS Qs i K A first tightening nd tightening Figure 1 4 Connecting and grounding the connector 108 APPENDIX 9 Note The cable shield hasto be connected to the cable bushing for full BMC protection In automation sytem the galvanic ally isolated inputs i are recommended for curent sgnals Channelt y Moisture and Channelt temperature outputs curenti voltage To Control yem Channel2 Max load for Channel2 m outputs 500 ohm Digital cur rent loap R165 Serial comnections See manual for Supply voltage 24 WDC details max 120 ma for24 VAC ee the Operating The supply minus is connected Manual 7 PP Y to analog output minus al GRN Temperature Pgs connection END Moisture To Contmal sytern PX Temperature sensor Moisture sensor Hobe cable length 2 50r 10 m Location of main board terminals Output voltage
68. er RESET or power on the current date is 1991 01 01 HMP228 Transmitters M210282en A Appendix 1 Serial commands Activating the date output gt fdate on Form date ON gt r 1995 03 10 aw 0 206 T 26 0 C 1995 03 10 aw 0 206 T 26 0 C 1995 03 10 aw 0 206 T 26 0 C 1995 03 10 aw 0 206 T 26 0 C 1995 03 10 aw 0 206 T 26 0 C Inactivating the date output gt fdate off Form date s PORE gt r aw 0 202 T 26 0 C aw 0 202 T 26 0 C aw 0 202 T 26 0 C aw 0 202 T 26 0 C aw 0 202 T 26 0 C SERI Serial bus settings SERI bpdsx lt cr gt bauds 300 600 1200 2400 4800 9600 parity n none e even o odd data bits 7 or 8 stop bits 1 or 2 duplex H half F full vu ando oe Il Giving the command on its own outputs the current settings gt SERI lt cr gt 4800 E 7 1 FDX The settings can be changed one parameter at a time or all parameters at once gt SERI O H lt cr gt changing parity and duplex 4800 O 7 1 HDX gt SERI 600 N 8 1 F lt cr gt changing all parameters 600 N 8 1 FDX The processor does not allow the following combinations e no parity 7 data bits 1 stop bit if this combination is given the HMP228 programme will change the number of stop bits to 2 e even or odd parity 8 data bits 2 stop bits if this combination is given the programme changes the number of stop bits to 1 57 HMP228 Transmitters Appendix 1 Serial
69. gh it 69 HMP228 Appendix 2 Display commands M210282en A 1 1 2 1 Setting the serial interface operation mode e Select Mode in the main menu the following is displayed ote i al OLLPUL i pi efr AE GHB ES E e Select Serial output tor Run Poll e The currently valid setting flashes Select the desired mode with the arrow keys and press ENT After this the programme returns to the Mode Menu e When Run mode is selected the currently valid output interval is dis played The output interval setting can be changed as follows Outeul interval dda POUP e press CL e the number starts flashing e if the interval needs to be changed press CL again and enter the new interval otherwise press ENT e the unit s min h starts flashing e the unit can be changed with the arrow keys and acknowledged with ENT e after this the programme returns to Mode menu 70 HMP228 M210282en A Appendix 2 Display commands 1 1 3 Others 1 1 3 1 Setting the measurement integration time By lengthening the measurement integration time any stray changes in the output c
70. hout disconnecting the external load The output current can however be measured at test points CH1 CH1 and CH2 CH2 without disconnecting the output wires These test points can therefore be used in one point offset correction against an accu rate reference or in checking the current output without disconnecting the analogue output from the process 35 HMP228 Operating Manual M210282en A OO OOO OOO000000 O00 E Chi Ch2 Current loop or E RS485 module CH1 CH1 PP AA lt lt TEST POINTS Figure 4 8 1 2 Circuit diagram of the analogue output current test points 4 8 1 Calibration of the analogue outputs The analogue outputs have been calibrated at the factory and since they are very stable calibration of the outputs should be performed only when there is reason to believe that their adjustments have changed Disconnect the security lock jumper 36 M210282en A HMP228 Operating Manual 4 8 1 1 Using serial commands ACAL lt cr gt The outputs on channels 1 and 2 are measured and the measured values mA or V entered as calibration coefficients Example both channels have 0 10 V outputs set with AMODE command enter the voltages measured at the analogue outputs gt ACAL lt cr gt Chil Ul V 0 123 lt cr gt Chl U2 V
71. im 5 PRES Setting the pressure for mixing ratio calculations PRES pppp pp lt cr gt PPpp pp pressure hPa The atmospheric pressure has an effect on mixing ratio Therefore accurate mixing ratio calculations can be achieved only when the ambient pressure is taken into consideration When the command is given the transmitter first gives the currently used pressure after this a new value can be entered or the old one acknowledged gt PRES lt cr gt Pressure 1013 25 1000 00 lt cr gt When the currently used pressure is known a new pressure can also be entered directly gt PRES 1010 lt cr gt Pressure 1010 NOTE If the pressure setting is frequently adjusted e g by using an external barometer as a pressure input source the command XPRES is recommended 62 HMP228 Transmitters M210282en A Appendix 1 Serial commands XPRES Setting the pressure for mixing ratio calculations tempo rarily XPRES pppp pp lt cr gt Pppp pp pressure hPa The function and format of XPRES are the same as those of the PRES com mand except that with XPRES command the setting is valid only until a reset is given power is turned off or pressure is set to zero with XPRES After this the pressure stored with command PRES is valid again CDATE Entering calibration date CDATE xxxxxx lt cr gt XXXxxx calibration date 000101 991231 When the latest calibration date has to kept in memory it is entered as fo
72. ing the output interval for the RUN state INTV xxx yyy lt cr gt XXX output interval 0 255 0 no pause between outputs yyy unit s min or h Sets the output interval when the transmitter outputs measurement readings to a peripheral device For example the currently valid settings are output with gt INTV lt cr gt Output intrv 0 min When this is changed into 10 minutes the command is gt INTV 10 lt cr gt Output intrv 10 min The unit is changed into seconds with gt INTV S lt cr gt Output intrv 10 s The change can also be done with one command gt INTV 10 S lt cr gt Output intrv 10s 54 HMP228 Transmitters M210282en A Appendix 1 Serial commands FORM Setting the output format FORM lt cr gt XXX XXX ZZZ LLZ lt cr gt XXX XXX old format ZZZ ZZZ new format The FORM command sets the format of the outputs generated in RUN state and by SEND command Please note that capital and small letters have dif ferent meanings aa aa water activity TT TT temperature uu uu unit according to the preceding variable n line feed lt If gt r carriage return lt cr gt t horizontal tabulation lt ht gt or lt tab gt For example format output a aaa Y TT TT r 0 123 99 99 lt cr gt NETT TA NU NENA 15 2 C lt cr gt lt l1f gt a aaa DD D uu r 0 123 10 8 C lt cr gt Any text can be written in the command and it appear
73. ity is immune to the aging of oil and to additives and that the HMP228 transmitter can be used for continuous on line measurements In addition the HMP228 can be calibrated against salt solutions and no reference oils are needed 1 2 2 Lubrication oil in paper machines Typically a paper machine contains two or three separate lubrication systems Usually one is located at the wet end and the other at the dry end There is a certain amount of free moisture constantly present which means that there is a risk of this moisture becoming into contact with the machine bearings The most common reasons for the entrance of water are an inadequate sealing of the housing and cleaning with high pressure However accidental leakages from oil coolers and other equipment may also cause damage In paper machines the oil should absorb water while lubricating the bearings and then release this water when collected into the reservoir It is to be noted that bearings should never be exposed to oils that have a high water content this is especially important during standstill because the risk for corrosion process increases as the oil temperature decreases It is essential to monitor the water content and keep it on a suitable level When measuring the water content of oil in paper machines it would be useful to measure the water activity before an oil reservoir and from a pressure line flow This way the performance of dehumidifiers can be kept under control to
74. l lows gt CDATE 940506 lt cr gt If the command is given without the date the transmitter outputs the latest calibration already in memory gt CDATE lt cr gt 940420 The date can be given in any format however the maximum number of digits is SIX DATE Setting the date DATE lt cr gt For example to enter a new date gt DATE lt cr gt Current date is 1993 01 30 Enter new date yyyy mm dd 1993 06 12 lt cr gt When the current date is asked the new date is passed with lt cr gt 63 HMP228 Transmitters Appendix 1 Serial commands M210282en A TIME Setting the time TIME lt cr gt For example to enter a new time gt TIME lt cr gt Current time is 01 35 54 Enter new time hh mm ss 13 25 56 lt cr gt When the current time is asked the new time is passed with lt cr gt VERS Name and version of the programme VERS lt cr gt For example gt VERS lt cr gt HMP 228 x yy where x yy is the programme version 2 Outputting the transmitter settings For example gt lt cr gt HMP 228 1 01 CPU serial nr 0 Keyboard type 0 Address 7 Output units metric Baud P D S 4800 E 7 1 FDX Serial mode STOP Output intrv 0 min Mtim 32 Pressure 1013 25 Analog outputs Chi OOO e 10 00 V Ch2 0 00 10 00 V Ch1 aw lo 0 000 Ch1 aw hi 1 000 Ch2 T lo 20 000 C Ch2 T hi 180 000 C Transducer PRB serial nr 0
75. measurement output OUTPUT VIA THE SERIAL BUS 52 R Starting the measurement output Starts output of measurements to the peripheral devices PC display or printer output interval is set with command INTV The output format depends on the transmitter configuration and which vari ables are in use The order however is always the same water activity and temperature temperature An example aw 0 43 0 T 21 0 C lt cr gt lt lf gt When the transmitter sends out the readings the serial interface does not echo any commands the only command that can be used is S stop The output mode can be changed with command FORM S Stopping the measurement output Ends the RUN state after this command all other commands can be used HMP228 Transmitters M210282en A Appendix 1 Serial commands SEND Outputting a reading once SEND lt cr gt in STOP state or SEND aa lt cr gt in POLL state aa address of the transmitter when more than one transmitter is connected to a serial bus 0 99 set with command ADDR Outputs the current measurement readings via the serial line The output for mat depends on which parameters the transmitter can output Output types are aw 999 T 999 9 C lt cr gt lt lf gt The output mode can be changed with command FORM DSEND Outputting readings of all connected transmitters once DSEND lt cr gt All transmitters connected to the serial bus send their addresses and current measureme
76. mm TX TERMINAL D25P 7 EE GND 2 EX RX Figure 3 2 2 Connection of cables When the serial bus has been connected between the PC and the transmitter the PC is switched on When using a PC a terminal emulation programme e g Procomm Plus Datastorm or Windows terminal is started The factory settings for data transfer are e 4800 baud e even parity e 7 data bits e 1 stop bit e full duplex HMP228 M210282en A Operating Manual NOTE When the serial bus settings are changed the transmit ter has to be reset before the new settings become ef fective The processor does not allow the following combinations e no parity 7 data bits 1 stop bit if this combination is given the HMP228 programme will change the number of stop bits to 2 e even or odd parity 8 data bits 2 stop bits if this combination is given the programme changes the number of stop bits to 1 Refer to the manuals of the PC and the terminal emulation programme when giving serial settings The RS 232C screw terminal cannot be used if an RS 485 422 serial module or a current loop module is used See Appendices 3 and 4 on how to install and operate these modules In calibrating or changing the settings of the transmitter it can be more con venient to use the connector X17 if connector X6 is already in use This con nector however transfers only RS 232C signals If an RS 485 422 serial port module or a current loop module has been installed it has to be
77. ne terminations must be dynamic e g an RC circuit is used instead of a simple resistor termination Each RS 485 module has a dynamic line termina tion so it can be used at the end of a line RS 485 network settings HMP228 settings Full duplex half duplex Echo on off Line feed after carriage return HDX FDX When terminal is set to general lt If gt line feed after lt cr gt carriage return the listings will have two line feeds when also the HMP228 transmitters send line feed M210282en A 5 SPECIFICATIONS Connections on the main board Assembly Board dimensions Operating mode single or dual pair wiring Network network type cable type line length max number of devices data speed operating mode common mode voltage range Operating temperature Storage temperature HMP228 Appendix 4 RS 485 422 serial port module Berg sockets screw terminals 0 5 mm wires stranded wires recommended plug in module 40 x 28 mm half duplex daisy chain twisted pair 1000 m 3000 ft 32 devices on line 9600 baud max for HMP228 transmitters polling mode 7 V 40 60 C 40 70 C 87 HMP228 Appendix 5 Digital current loop module M210282en A APPENDIX 5 INSTALLING AND USING THE DIGITAL CURRENT LOOP MODULE 1 INSTALLATION oi ies 89 2 OPERATION ii e 90 3 NETWORK CONFIGURATION oooonoccccccccccconnnnncnnonnnnnnannnnn nn rr rrnrnnnnnnnn errar 92 Single loop OP Erat O ae aa indic
78. next RESET or power off gt seri 2400 e 7 1h 2400 E 7 1 HDX 92 HMP228 M210282en A Appendix 5 Digital current loop module e Set the transmitter in POLL mode gt smode poll Serial mode POLL NOTE 1 The SMODE command must be given last NOTE 2 The transmitter outputs no prompt gt after the SMODE POLL command and it only reacts to commands which include its address e Check that the transmitter responds to its address send 22 aw 0 244 T 29 1 C e Disconnect the terminal e Remount the digital current loop module e Close the cover e When all transmitters on the network have been configured switch them off Dual loop operation Single pair dual pair use is configured through wiring see figure on page 2 The following procedure must be repeated with all transmitters e Open the transmitter cover e Pull out the digital current loop module if it is already mounted e Set the serial port of the terminal to 4800 baud even parity seven data bits and one stop bit full duplex 4800 E 7 1 FDX e The serial settings of the transmitter must also be 4800 E 7 1 FDX and the transmitter must be in STOP mode If these factory settings have been changed they must be changed back Connect the RS 232C port of the terminal to connector X17 on the top of the main board and switch the power on y RX GND TX lt O0 0 0 0N i 93 HMP228 Appendix 5 Digital current loop module M2
79. nnncrnnnnnnrrnnnnnnns 22 4 3 1 2 Using display keypad COMMANAS cocoocccccnnncccnnnnnnccnnnnnnccnnnnnncnnnonancnnnnnnnns 22 4 3 1 3 Using LED comman Suresi riian iia a A AST A EN 23 4 3 2 One point calibration procedure ccccceceeeeeaeeeeeeeeeeeeeeeaeaaeeeeeeeeeeeeaeaae 23 4 3 2 1 Using serial commands uec raana a EN A 23 4 3 2 2 Using display keypad COMMANAS ceeceeeeeeeeeee ee eeeeeeaaeeeeeeaaeeeeeeaaeeeees 24 4 3 2 3 Using LED COMMANAS or aa etna terete a N a ea ara 24 4 4 Changing the moisture SCNSOL ssssssssssnsnsnnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnmnnn 24 4 4 1 Calibration procedure after sensor ChAange ccceeeeeeeeeeeeeeeeeeeeeeeaeaaes 25 4 4 1 1 Using serial COMMANAS ooocccccconnnnccccnnnnccnonnnnncnnnnnnnnnonnnncnnnnnnnnnnnnnnnccrnnnanas 25 4 4 1 2 Using display keypad COMMANAS ccccoonccccnoncccnnnnnnccnnnnnncnnnnnnncrnnnnnncnnnnnnnns 25 4 4 1 3 Using LED COMMANA Srnie ea Ea EEE aT A EA EE ENNER ENNEA 26 4 4 5 Humidity calibration table ooooncccononcccccnoncccnonnnacononnnacononnnnccnnnnnnccnnnnnncinnns 27 4 6 Temperature Calilbration cccccseeceeeeeeeeeeeeeeeeeeceeeeeeeeeeaeeeeeeaaeeeeeeeeeeeeeeseeeeaeeneees 27 4 6 1 One point offset correction 00 00 ce eeeececeeeeeeeeeeeee ee aeeeeeeeeeeeeeeeaeaaaaneeeeeeseeaeaaea 27 4 6 1 1 Using serial COMMANAS cececceeeeeececeeeeeeeeeeeeee cena A A O 27 HMP228 Operating Manual M2
80. nnrrnrn cnn 98 APPENDIX 8 CONNECTORS bie ete sccsieces coccecend odscdeccceccccasddadaccecccteed stdacavcececdocteafavareccecasecandeetees 105 APPENDIX 9 WIRING 109 HMP228 M210282en A Operating Manual This page intentionally left blank HMP228 M210282en A Operating Manual 1 1 1 1 2 PRODUCT DESCRIPTION General characteristics The HMP228 transmitter is a microprocessor based instrument for the measurement of moisture in terms of water activity e g in the lubrication of circulation systems or in transformer oil The transmitter incorporates a capacitive thin film sensor The operation of the sensor is based on changes in its capacitance as the thin polymer film absorbs water molecules The HMP228 transmitter has two analogue outputs and can be connected to a serial bus via the RS 232C interface or through an RS 485 422 serial module or a current loop module The transmitter can be configured in many ways It can have either a blank cover or a cover with a local display and keypad with which the user can operate the transmitter The power supply voltage can be selected from three alternatives Two analogue output signals can be scaled and the measurement ranges changed within certain limits The HMP228 transmitter can be supplied with two five or ten metre sensor head cable The HMP228 also provides for accurate temperature measurement It is an easy to install on line transmitter which can be calibrated against traceabl
81. nt readings in an order defined by their addresses After receiving DSEND command a transmitter sets a delay time according to its address value and sends the data after this delay DSEND works also in POLL mode With this command the user can for example easily find out the addresses of the transmitters The output when four transmitters with addresses 4 5 10 33 have been con nected to the serial bus gt dsend lt cr gt 40 144 60 3 C 50 150 63 2 C 100 122 62 0 C 33 0 135 61 1 C ERRS Outputting error messages ERRS lt cr gt During operation error messages are not output automatically through the se rial interface If there is any reason to doubt that there is something wrong with the transmitter possible error messages can be output with command ERRS If there are no error messages only a prompt is displayed gt ERRS lt cr gt gt 53 HMP228 Transmitters Appendix 1 Serial commands M210282en A If errors have occurred the transmitter outputs the error code see Appendix 5 for error messages gt ERRS lt cr gt E40 f all out of range gt ECHO Turning the serial interface echo ON OFF ECHO xxx lt cr gt XXX ON or OFF When the echo is off the commands given through the serial interface or the prompt gt cannot be seen on the display When the serial interface is in half duplex mode the echo is always off Even then the ECHO command can indicate that echo is on INTV Sett
82. nter the first point value and press lt cr gt gt CT lt cr gt Te E OO Refl yy y lt cr gt Press any key when ready e If you want to see how the sensor stabilizes to the reference temperature enter c lt cr gt instead of the first reference 27 HMP228 Operating Manual M210282en A T 0 90 Refl Cc lt cr gt T 2 05 55 Refi Y lt er gt Tr 0 55 Rel 700 0 lt er gt Press any key when ready e After giving the correct temperature value Ref1 and pressing lt cr gt press any key and then lt cr gt 4 6 1 2 Using display keypad commands e Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap prior to calibration e Check the transmitter against the reference e Select Cali in the main menu and then T cal select one point calibration T 1 point cal e Change the reading with the arrow keys to correspond to the reference and press ENT 4 6 1 3 Using LED commands 4 6 2 e Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap prior to calibration e Check the transmitter against the reference e Connect an ammeter voltmeter to the analogue outputs connector X2 Give command OO O At the first calibration point the LED on the left flashes adjust the first point offset with the arro
83. o the same connector 19372 24 VAC VDC HMP230PW X1 24V X1 NC The female connector part no 19372 is situated at the centre of the transmitter The counter piece incorporating screw terminals no 19369 is delivered with each connector 106 HMP228 M210282en A Appendix 8 Connectors 1 3 Serial connections Also an RS232C serial bus can be connected to the connector in this case the connector is used mainly for maintenance and calibration purposes Alternatively a two wire RS 485 net can be built through the connector in this case also the power supply 24 VDC is chained through transmitters RS232C connection i IA The male connector part n 19371 is located on the right hand side of the transmitter It is mounted with a sleeve socket Pg11 Pg9 part no 19813 The counter piece incorporating screw terminals part no 19370 is delivered with each connector RS485 single loop wiring EXA INN Ec IA X1 24V X1 24V The female connector part no 19372 is located at the centre of the transmitter The male connector part no 19371 is located at the right hand side of the transmitter It is mounted with with a sleeve socket Pg11 Pg9 part no 19813 Counter pieces parts no 19369 and 19370 are delivered with each connector If the transmitter is removed for maintenance the counter pieces can be connected to each in order not to break the RS485 loop 107 HMP228 Appendix 8 Connectors M210282
84. ot mebrio non ner ic e Use the arrow keys to select the right alternative and press ENT metric non metric 1 1 2 Output modes The output modes only affect output through the serial interface the transmit ter accepts all display and LED commands irrespective of which serial output mode it is in The HMP228 transmitter has three serial output modes RUN STOP and POLL In the RUN state the transmitter outputs measurements automatically through the serial interface to a PC or a peripheral The only command that can be given through the serial interface is S stop which ends the RUN state In the STOP state serial commands are given to the transmitters Measure ments are then output only by entering command SEND The POLL state is used when more than one transmitter is connected to the same serial bus a single transmitter can be addressed and communicated with When the connection to the one transmitter is opened in the POLL state the transmitter goes into STOP state and can then receive commands normally Closing the connection returns the transmitter to POLL state In POLL state the transmitter outputs measurement only when requested command SEND aa If the user has forgotten the address of the transmitter and the transmitter does not have a display the transmitter has to be reverted to the factory set tings If the transmitter has a display the settings can be checked throu
85. pen 22 lt cr gt HMP 22 line opened for operator commands Transmitter no 22 is now temporarily set to STOP mode it accepts com mands sent without address until CLOSE command is given Individual set tings can now be easily modified Do not open more than one line at a time Use command to find out the settings of the active transmitter lt cr gt HMP228 1 01 CPU serial nr 0 Keyboard type 0 Address E 7 Output units metric Baud P D S 4800 E 7 1 FDX Serial mode STOP Output intrv 0 min Mtim 32 Pressure 1013 25 Analog outputs Chi DEDO ce 10 00 V Ch2 ODO ss 10 00 V Ch1 aw lo 0 000 Ch1 aw hi 1 000 Ch2 CT 3 lo 20 000 C Ch2 T hi 180 000 C Transducer PRB serial nr 0 Calibr date 0 When the necessary settings have been given close the line to transmitters the command closes all open lines gt close line closed CLOSE command is always given without address If no lines are open there will be no response to the CLOSE command 85 HMP228 Appendix 4 RS 485 422 serial port module M210282en A 86 POLL mode If a transmitter has been set to POLL mode it will respond only to commands which include its address send 22 aw 0 244 T 29 1 C Addresses from 1 to 99 can be used According to the RS 485 422 standard a maximum of 32 devices can be connected on same bus but the number can be increased if the line length and or baud rate is reduced The li
86. r Wait for 30 minutes Connect an ammeter voltmeter to the analogue outputs connector X2 Give command OOO At the first calibration point the LED on the left flashes adjust the first point offset with the arrow switches to the value given in the calibration table Chapter 4 4 5 and press ENT switch Insert the sensor head into the calibration hole of the NaCl chamber in the humidity calibrator Wait at least 30 minutes Check that the reading corresponds within the desired accuracy to the value given in the calibration table Chapter 4 4 5 If not adjust the second point with the arrow switches to the correct value and press ENT At the second calibration point the second LED from the left flashes The basic capacitance of the new sensor may differ considerably from that of the previous one Therefore the corresponding humidity reading of the transmitter may be below 0 RH at the low or above 100 RH at the high calibration point However the current voltage reading of the analogue output shows only the minimum or maximum value of the selected current voltage scale and the output value may not change even though the arrow switches are pressed several times If this happens press the up or down arrow switch continuously to bring the output back into the selected scale this may take as long as half a minute 26 HMP228 M210282en A Operating Manual 4 6 4 4 5 Humidity calibration table SOSA SG 86 SO 4 20mA
87. r is less LY than 7mm use a shrinking tube or an adhesive tape e push back the braid and press it between the two brass disks to achieve a full 360 grounding the fold between the disks should have the same diameter as the brass disks e secure the braid with a shielding tube e insert the wires into the transmitter housing through the gland e tighten the nut M210282en A HMP228 Operating Manual connect the wires into the screw terminals and fasten a cable tie around the wires Use connectors instead of traditional cabling See Appendix 8 for connector types available and for detailed instructions cable tie transmitter housing gland brass disks rubber ring nut NOTE When the cable is grounded as explained the metallic parts of the sensor head the screen of its cable the transmitter housing and the screen of the signal cable to external system are all connected to each other After this the whole system can be grounded from one point only If the grounding is made via several points sensor head transmitter housing signal cable make sure that the different groundings are made to the same grounding potential Otherwise harmful grounding currents may be generated If you do the grounding via the transmitter housing use one serrated lock washer between a mounting screw and the housing
88. ration can be done against an accurate transfer standard in the field and a two point calibration using saturated salt solutions in controlled conditions A two point calibration is performed as follows gt CRH lt cr gt RH 12 00 Refl 11 3 lt cr gt Press any key when ready RH 76 00 Ref2 75 5 lt cr gt In one point offset correction the Ref2 prompt is acknowledged with lt cr gt gt CRH lt cr gt RH 12 80 Refl 11 3 lt cr gt Press any key when ready RH 75 50 Ref2 lt cr gt If the stabilization of the sensor to the humidity in the calibrator needs to be monitored the measurement output can be repeated by giving command c lt cr gt at Refl and Ref2 gt CRH lt cr gt RH T7001 Rel E lt A gt RH 11 70 Refl c lt cr gt RH 11 50 Refl 11 3 lt cr gt Press any key when ready RH 76 00 Ref2 75 5 lt cr gt FCRH Relative humidity calibration after sensor change Disconnect the security lock jumper FCRH lt cr gt After moisture sensor change the transmitter must be calibrated using this command and the calibration must be done at two reference points The cali bration is performed as follows gt FCRH lt cr gt RH 1 90 Refl 11 3 lt cr gt Press any key when ready RH 76 30 Ref2 74 9 lt cr gt 49 HMP228 Transmitters Appendix 1 Serial commands M210282en A 50 The command can also be divided into two commands so the computer can be used for other purpose
89. re when the power is switched on If the procedure does not reveal any errors or faults the transmitter starts operating normally If errors or faults are found check first if the moisture and temperature sensors are damaged If they are intact send the transmitter to Vaisala for repairs The error messages are listed in Appendix 3 If any errors occur during operation the error messages are output on the local display if the transmitter displays measurements if the menus are used error messages are not output The LEDs indicate errors at all times During opera tion however the error messages are not output automatically through the se rial interface If there is any reason to doubt that there is something wrong with the transmitter use command ERRS ERRS lt cr gt If there are no error messages only a prompt is displayed gt ERRS lt cr gt gt When errors have occurred the transmitter outputs the error code see Appen dix 3 for all error messages gt ERRS lt cr gt E40 f all out of range gt Reference measurements Reference measurements are needed to verify whether the transmitter readings are within specifications This way the user can check if the transmitter needs calibration or service Whatever the technique used make sure that the reference instrument is at the same temperature as the checked instrument in order to avoid errors caused by temperature differences The reference measurement
90. removed be fore communicating through the X17 connector NOTE Some PC computers can generate interferences to the measured humidity and temperature values if the transmitter and the PC are connected to different mains outlets To minimize the possibility of these interfer ences always use the same main outlet same phase of the main electricity for the PC and the power supply of HMP228 It is always preferable to use the connector X16 instead of the connector X17 because it is more immune to interferences The serial commands are described in Appendix 1 HMP228 Operating Manual M210282en A 3 3 Using LED commands NOTE If the transmitter has a display keypad cover the LED commands cannot be used LED commands can be used to operate the transmitters in the field These commands can be used in humidity and temperature calibration and calibration of the analogue outputs Open the housing and press any one of the three press switches The LEDs will light up for 2 3 seconds LEDS O ODODODOD UPA e PRESS SWITCHES OOO OOOO E Chi Chi Chi Ch2 Rx Current loop or a ee xX 24V Gua 89898 Figure 3 3 Location of press switches and LEDs Use the up and down switches marked with arrows on the printed board to find the desired command code and acknowledge it with the ENT switch The
91. row switches to the correct value and press ENT At the second calibration point the second LED from the left flashes 4 6 3 Temperature channel adjustment with Pt 100 simulators Switch the power off and disconnect the wires to the Pt 100 sensor from solder lugs TP5 TP6 and TP7 TP6 TP7 ihe fis O Oe D gt Oe X88 gt Os Oe O 202 Qs E TP5 Figure 4 6 3 1 Location of solder lugs TP5 TP6 and TP7 and connector X88 Connect a Pt 100 simulator to connector X88 and set it at the lowest tempera ture to be calibrated Pt 100 X88 EE Figure 4 6 3 2 Connecting the Pt 100 simulator to connector X88 Switch the power on Follow the one or two point calibration instructions in Chapters 4 6 1 4 6 2 Switch the power off Disconnect the Pt 100 simulator and reconnect the Pt 100 wires to solder lugs TP5 TP6 and TP7 The correct connections according to the wire colours are TP5 If there is not a Pt 100 simulator available the adjustment can be made with two resistors of 84 Q and 154 Q whose resistance is known precisely Measure the resistor with a resistance meter Look up the corresponding temperature value from a Pt 100 conversion table or calculate it using the following equation 30 M210282en A HMP228 Operating Manual T D0 Rx D1 R x D2 R x D3 R x D4 where DO 243 5673014 DI 2 278542701 D2 0 002050681 D3 6 15025E 06 D4 1 34949E 08 4 7 Analogue output ch
92. rst reference RH 11 9 Refl c lt cr gt RH 11 5 Refl c lt cr gt RH 11 5 Refl 11 3 lt cr gt Press any key when ready e Insert the sensor head into the calibration hole of the NaCl chamber of the humidity calibrator e Wait at least 30 minutes e Press any key and enter the second point value press lt cr gt RHE ONO Ref2 yy y lt cr gt e The stabilization of the sensor can be monitored by entering c lt cr gt instead of the reference value 4 3 1 2 Using display keypad commands e Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap on the transmitter e Select Cali in the main menu and then RH cal select Not changed and then two point calibration RH 2 point cal Change the first point reading with the arrow keys to correspond to the reference humidity and press ENT pressing an arrow once changes the reading by 0 05 RH 22 M210282en A 4 3 1 3 4 3 2 HMP228 Operating Manual Using LED commands Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap on the transmitter Connect an ammeter voltmeter to the an
93. s Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap prior to calibration Check the transmitter against the reference Select Cali in the main menu and then T cal select two point calibration T 2 point cal Change the first point reading with the arrow keys and press ENT Change the temperature and again check the transmitter against the reference Check that the reading corresponds with the reading of the reference instrument If not adjust the second point If necessary change the second point reading with the arrow keys and press ENT Using LED commands Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap prior to calibration Check the transmitter against the reference Connect an ammeter voltmeter to the analogue outputs connector X2 Give command OO O At the first calibration point the LED on the left flashes adjust the first point offset with the arrow switches to the same reading with the reference and press ENT switch Change the temperature and again check the transmitter against the reference 29 HMP228 Operating Manual M210282en A e Check that the reading corresponds with the reading of the reference instrument If not adjust the second point e If necessary adjust with the ar
94. s in the output For ex ample aw a aaa T TT TT r aw 0 54 T 25 lt cr gt The format can be deleted by giving as a parameter gt FORM lt cr gt Note only one space before and none after or gt FORM lt cr gt TRX fag KEK lt cr gt An example of a format suitable for use in Microsoft Excel spreadsheets gt FORM lt cr gt TRX a YK a aaa t TTT T r n lt cr gt The output is then 0 474 lt tab gt 22 4 lt cr gt lt lf gt 55 HMP228 Transmitters Appendix 1 Serial commands M210282en A 56 FTIME Adding time to output FTIME xxx lt cr gt XXX ON or OFF When FTIME is activated the current time is output at the beginning of the output line The time is set with command TIME After RESET or power on the current time is 00 00 00 Activating the time output gt ftime on Form time E ON gt intv 5 s Output intrv 5 09 31 13 aw 09 31 18 aw 09 31 23 aw 09 31 28 aw 09 31 33 aw 09 31 38 aw L99 1 95 2 1 9 5 1 95 195 195 oo0oo0ooo Inactivating the time output gt ftime off Form time OFF gt r aw aw aw aw aw aw 0 0 0 0 0 0 HHHAHAH PRPPRPRPP FDATE Adding date to output oo0oo0ooo Cc Cc Cc Cc Cc setting the output interval FDATE xxx lt cr gt XXX ON or OFF When FDATE is activated the current date is output at the beginning of the output line The time is set with command DATE Aft
95. s the factory setting when a single loop connection is used the positions of jump ers in connector X4 on the module must be changed The HI of the receiving line is approx 0 6 V and its LO is approx 0 V in or der to reduce noise on the lines when no data is transferred idling Both lines are terminated with a 120 ohm resistor in series with a 33 nF capacitor When operating the transmitter through a single pair naturally only one line terminal impedance is in use The line must not be terminated with a resistor alone as then the power consumption increases too much The data lines can withstand short circuit to ground and to each other They do not survive connection of supply voltage to the data lines The module must be mounted on the main board in the right direction It can be mounted in the wrong direction or to the wrong pins without breaking the module it simply does not work then 3 HMP228 M210282en A Appendix 4 RS 485 422 serial port module NETWORK CONFIGURATION Single loop operation Bi directional data on one pair is one of the great advantages of the RS 485 line Set jumpers in connector X4 on the module board as shown in the figure below X4 X4 This jumper setting connects RX HI to TX HI and RX LO to TX LO and se lects only one common line termination The HI and LO terminals of the RX pair can now be used for operation Supplying power from the
96. s while waiting for the sensor to stabilize to the higher humidity gt FCRH 1 lt cr gt RH 1 90 Refl 11 3 lt cr gt FCRH 2 lt cr gt RH 76 30 Ref2 74 9 lt cr gt If the stabilization of the sensor to the humidity in the calibrator needs to be monitored the measurement output can be repeated by giving command c lt cr gt at Ref1 and Ref2 gt FCRH lt cr gt RH 3 12 00 Refl c lt cr gt RH 11 70 Refl c lt cr gt RH 11 50 Refl 11 3 lt cr gt Press any key when ready RH 76 00 Ref2 75 5 lt cr gt CT Temperature calibration Disconnect the security lock jumper Using this command the transmitters can be calibrated against an accurate ref erence such as a Pt 100 simulator A two point calibration is performed as follows gt CT lt cr gt E 0 80 Refl 0 0 lt cr gt Press any key when ready Dos 36 20 Ref2 55 0 lt er gt In one point offset correction the Ref2 prompt is acknowledged with lt cr gt gt CT lt cr gt TAS 0 80 Refl 0 0 lt cr gt Press any key when ready Ty Ey 15 50 Ref2 lt cr gt If the stabilization of the sensor to the temperature of the calibrator or the ref erence needs to be monitored the measurement output can be repeated by giv ing command c lt cr gt at Refl and Ref2 gt CT lt cr gt Te 233 0 80 Refl Cc lt cr gt Es Es 0 40 Refl 0 00 lt cr gt Press any key when ready T rs 56 20 Ref2 553 0 lt cr gt HMP228 Tran
97. should be made as close to the checked sensor as possible and the readings should be read at the same time when possible HMP228 M210282en A Operating Manual 4 3 Moisture calibration The HMP228 transmitter has been fully calibrated at the factory so there should be no immediate need for recalibration The transmitter should be calibrated only if there is reason to believe that the adjustments have changed The optimal interval for moisture calibrations depends on the process and the recommended interval varies from 3 months to 2 years NOTE The HMP228 transmitter measures water activity in liquid oil and the calibration is performed as for relative humidity transmitters In calibration mode the transmitter automatically outputs relative humidity as the calibration parameter It is essential to clean the sensor surface of oil before calibration use e g instrument air or nitrogen to blow off the oil Even the smallest amount of oil may destroy the salt solution NOTE As oil performs a membrane over the sensor surface the sensor s capability of absorbing moisture is slowed down The stabilization time is thus at least double the time of a clean sensor pay special attention to controlling the stabilization time A two point calibration can be performed with Vaisala s HMK15 or HMK13B Calibrator or the instrument can be sent to Vaisala The instrument has to be recalibrated each time the moisture sensor is changed A 13
98. smitters M210282en A Appendix 1 Serial commands ACAL Calibrating the analogue outputs Disconnect the security lock jumper ACAL lt cr gt Calibrates the outputs selected on channels 1 and 2 The output is measured and the measured values mA or V entered as calibration coefficients For example calibrating the outputs when 0 10 V signal has been selected on both channels set with AMODE command gt ACAL lt cr gt Chl U1 V 0 123 lt cr gt Chl U2 V 9 980 lt cr gt Ch2 Ul V 0 120 lt cr gt Ch2 U2 V 9 980 lt cr gt L Outputting linear correction coefficients With the help of command L the user can check how the transmitter has been adjusted after it has been calibrated at the factory gt L lt cr gt RH offset 0 000 RH gain 1 000 Tsof set 0 000 Ts gain 1 000 Ll Entering linear correction coefficients Disconnect the security lock jumper The LI command is one way of calibrating the transmitters gt LI lt cr gt RH offset 0 000 6 lt cr gt RH gain 1 000 2 lt er gt Ts offset 0 000 lt cr gt Ts gain 1 000 4 lt cr gt The factory settings are offset O and gain 1 The transmitter can be returned to its factory calibration by giving these values 51 HMP228 Transmitters Appendix 1 Serial commands M210282en A NOTE The temperature unit in offset correction is always de grees Centigrade even if the transmitter is using non metric units Fahrenheit in its
99. t Setup according to Radiated emissions EN 55022 CISPR 22 class B With power supply unit HMP230PW Conducted emissions EN 55022 CISPR 22 class B Harmonic currents EN IEC 61000 3 2 Voltage fluctuations EN IEC 61000 3 3 5 7 2 Immunity Test Setup according to Electrostatic discharge EN IEC 61000 4 2 Electrical fast transients EN IEC 61000 4 4 Radiated immunity EN IEC 61000 4 3 Conducted immunity EN IEC 61000 4 6 Voltage proof AC DC supply or to housing 250 VAC 1 minute 300 KQ and 15 nF parallel CE 43 HMP228 Operating Manual 6 OPTIONS Power supply module Operating voltage Serial interface Cable length Display cover Connectors for supply signal RS232C and RS485 lines Ball valve set Alarm output unit 7 SPARE PARTS M210282en A 115 VAC 93 127 V 230 VAC 187 253 V RS485 422 module HMP230RS current loop module HMP230CL 2 5 or 10 metres cover with or without local display amp keypad see Appendix 8 for details DMP248BVS DMP240ALSP 2 pcs 8A 230 V CPCO single pole change over for adjustable low and high alarm 19525HM HM46999 Stainless steel filter outer thread 44 HMP228 Transmitters M210282en A Appendix 1 Serial commands APPENDIX 1 SERIAL COMMANDS 1 ANALOGUE OUTPUT COMMANDS 0000 ccccceceeeeeee ee ee ee ee sees eeae cnn ner nr cnn 46 AMODE Setting the analogue outputs ccceceee eee eeeeeeeeee ee aeeaeeeeeeeeeeeeaeaaeeee
100. the LED on the left flashes adjust the humidity point offset with the arrow switches to the reference value One push of a switch changes the output by 0 05 RH the change of the output voltage or current depends on the output scaling Press ENT switch The second LED from the left starts flashing press ENT again 4 4 Changing the moisture sensor Remove the damaged sensor and insert a new one Handle the sensor by the plastic socket DO NOT TOUCH THE SENSOR PLATE After sensor change the moisture calibration must be performed according to the instructions in section 4 4 1 24 HMP228 M210282en A Operating Manual 4 4 1 Calibration procedure after sensor change Humidity calibration should be performed in stable conditions using saturated salt solutions as a reference Disconnect the security lock jumper 4 4 1 1 Using serial commands e Leave the calibrator and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap on the transmitter e Insert the sensor head into the calibration hole of the LiCl chamber of the humidity calibrator e Wait for 30 minutes e Give command FCRH lt cr gt enter the first point value and press lt cr gt gt FCRH lt cr gt RH 11 9 Refl yy y lt cr gt Press any key when ready e The stabilization of the sensor to the reference humidity can be monitored by giving c lt cr gt RH 11 9 Refl c lt cr gt
101. the More menu fale 1902 061 BE e If the date is correct acknowledge it by pressing ENT this takes the programme back to the More menu e If the date needs to be changed press CL first the centuries 19 start flashing use the arrow keys to change them and press ENT the years 92 start flashing use the arrow keys to change them and press ENT the months 06 start flashing use the arrow keys to change them and press ENT the days 17 start flashing use the arrow keys to change them and press ENT 1 1 3 4 Setting the time e Select More in the main menu select Time in the More menu BE a d B El E ii Las oe Be e If the time is correct acknowledge it by pressing ENT this takes the programme back to the More menu e If the time needs to be changed press CL first the hours 14 start flashing use the arrow keys to change them and press ENT the minutes 25 start flashing use the arrow keys to change them and press ENT the seconds 32 start flashing use the arrow keys to change them and press ENT NOTE The transmitter does not have a real time clock with backup battery This means that the date and time set tings are not permanent 72 HMP228 M210282en A Appendix 3
102. the More menu then again More and then Echo Cho OF pho off e Use the arrow keys to select the right alternative and press ENT 1 1 1 2 Serial bus settings e Select Seri in the main menu the currently valid serial interface set tings are displayed dea Data af yn Saud eae Bath rro BE BB BE BE B e If the settings are correct press ENT the programme returns to the display mode e If the settings need to be changed press CL auc Pari Stor jala Duplex e Select the parameter to be changed with the arrow keys and ENT key Selecting baud rate 67 HMP228 Appendix 2 Display commands M210282en A oa 000 1206 eee Eee ile Selecting parity None Even mie Selecting data bits
103. tput I current output bb bbb lower limit of channel 1 CCCEC upper limit of channel 1 d channel 2 U voltage output I current output ee eee lower limit of channel 2 ff fff upper limit of channel 2 The bb bbb cc ccc ee eee and ff fff parameters are entered in volts or milliamperes Example lower limit of channel 1 is O V and upper limit 1 V U 0 1 lower limit of channel 2 is 2 V and upper limit 10 V U 2 10 gt AMODE U 01 U 2 10 lt cr gt Chl 0 000 1 000 V Ch2 2 000 10 000 V 32 HMP228 M210282en A Operating Manual 4 7 1 2 Using display keypad commands Disconnect the security lock jumper e Select Mode in the main menu and Analog outputs in the Mode menu Mode al Scale e Select Mode ma V The current settings for channel 1 are displayed Chl me E ES wou ake B BE toch e If the settings are correct press ENT e If the settings need to be changed press CL the quantity mA V starts flashing it can be changed with the arrow key and acknowledged with ENT the lower limit starts flashing acknowledge the lower limit with ENT or start changing it by pressing CL a new lower limit is given one character at a time with the arrow keys the upper limit st
104. val of the probe Install the sensor head transversely against the direction of the process flow NOTE Avoid mounting the transmitter housing close to steam sources or directly exposed to rain To ensure an IP 65 class protection 1 Always mount the transmitter housing with the cable bushings pointing downwards 2 Make sure that the connection cable has the right thickness 7 10 mm and that the cable bushing is carefully tightened 3 Pay always special attention to closing the transmitter cover carefully and remember to tighten all four screws NOTE Take care not to damage the pipe of the probe If the pipe is damaged the probe head is less tight and will not go through the clasp nut Make sure that the filter is tightly fastened to protect the sensors HMP228 Operating Manual 2 2 Mounting M210282en A In Figures 2 2 1 and 2 2 2 you can see the dimensions of the HMP228 transmitter and probe des VAISALA i J Figure 2 2 1 Probe pushed down Probe up co PA ES En H o Parallel thread 14 E Tapered thread E S LLI o vt g 8 N lt inl LES 913 5 he T Yao ii A Probe 180mm adjustment range 120mm Probe 400mm adjustment range 340mm Figure 2 2 2 Probe dimensions in mm 104 SOE WE a LUATA A 7 Ut LI I I I F aD 06 5 U 133 A 145
105. w switches to the same reading with the reference and press ENT switch e After adjusting the offset point and pressing ENT the second LED from left flashes Press ENT without changing the output value Two point temperature calibration Disconnect the security lock jumper 4 6 2 1 Using serial commands 28 e Leave the reference instrument and the transmitter for at least 4 hours in the same space so that their temperatures have time to equalize Remove the filter cap prior to calibration e Check the transmitter against the reference e Give command CT lt cr gt enter the first point value and press lt cr gt gt CT lt cr gt T 0 90 Refl yy y lt cr gt Press any key when ready M210282en A 4 6 2 2 4 6 2 3 HMP228 Operating Manual If you want to see how the sensor stabilizes to the reference temperature enter c lt cr gt instead of the first reference T 0 90 Refl Cc lt cr gt Tos O RETI 2 e lt er gt T 0 55 Refl 0 0 lt cr gt Press any key when ready Change the temperature and again check the transmitter against the reference Check that the reading corresponds with the reading of the reference instrument If not adjust the second point Press any key enter the second point value and press lt cr gt Le gt 20 0 Ref2 yy y lt cr gt The stabilization of the sensor can be monitored well by entering c lt cr gt instead of the reference value Using display keypad command
106. welded nipple No nipple diam 21 3 x S i A ONR material steel 5 1 sealed or AISI 304L Twn MOSS s the nipple edges have to be rounded Figure 2 2 3 2 Installing the probe through the ball valve assembly step 1 HMP228 Operating Manual e STEP 2 open the ball valve assembly a i oT 3 WEIR o o 05 5 at O A feb E EME 2 col i a ph wedge pa US a N ring A a WA lil Se E NN Il a E j m HE AA DE i o f A IN A N LO LEN j 4G i yi ON nut Need SA ES Ls a Y Re Y AV 27mm S ay sae 4 N y l ZRA IN la El A ES NY z screw a aapi rin VE g i 2 N i el wor a RR per sintered La O12 gt filter gt 014 B1 2 180 7 1 process pipe or chamber Figure 2 2 3 3 Installing the probe through the ball valve assembly step 2 measures in mm The clasp nut is tightened manually prior to opening the ball valve assembly HMP228 M21

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