VAISALA HMP130Y Operating Manual
Contents
1. 0 1V RH test connector Fig 1 Output selections connections and trimming points lt VAISALA SSD Operating Manual 2 2 Mounting HMP 130Y SERIES 4 20 Humidity and Temperature Transmitters 28th June 1991 HMP130Y 00205 4 3 The best position for the mounting of the HMP 131Y is with the probe pointing downwards Due to internal heat transfer the trans mitter should not be mounted with the probe pointing upwards It is recommended that the other models are mounted with the probe horizontally any water condensing in the tube can not then reach the sensors i Install the transmitter in a place where no cold or hot spot can develop When the sensor head is installed in a duct or channel where temperature is different from the ambient temperature insu late the point of entry this is particularly important when the transmit ter is installed sensor head pointing downwards An uninsulated installation can at worst lead to condensation in the sensor head and even when no condensation occurs the in or out flowing air changes the temperature near the sensor and so distorts the readings Fig 2 Mounting holes in the housings of the transmitters ave VAISALA HMP 130Y SERIES 5 20 dy Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 2 3 Electrica connections Connections recommended for different types of signals are present ed in Figures 3 4 and2. Temperature C as 5 EE E o fa s ne us na s ss se ss 2 2 22 oses oss oses 0 968 Poma atta otis otis tase tase tas2 1482 LJ oses oses oses _ oses ANA Table 1 Greenspan s calibration table LiCl solution must not be used or stored in temperatures below 18 C 64 F the equilibrium humidity of the salt solution changes permanently E gt VAISALA SSD Operating Manual HMP 130Y SERIES Humidity and Temperature Transmitters HMP130Y 00205 4 3 11 20 28th June 1991 MAINTENANCE Adjustment of temperature channel Basic calibration with a Pt 100 simulator If the output is current set the jumpers in position 4 20 mA Figure 1 If the output is voltage set the jumpers in mepi O EER position 0 25 1 25 V or 1 5 V depending on the volt A e age range l 2 Re ra af Disconnect the wires going to the Pt 100 sensor from the de 10 solder lugs of the circuit board R22 ER li a Ras Connect a Pt 100 simulator in the solder lugs or the Pt 100 a connector Figure 1 tons le praat AAAA 2 g E Connect an ammeter in poles l T and V or a volt meter in eee 2 poles VaT and Vou Connect the power in poles V and V Set the Pt 100 simulator in the lowest temperature of the tempera ture range of the instrument which is being calibrated and use potentiometer R48 to adjus
3. ments of the HMP 130Y series transmitters can be checked with the HMK 11 Calibrator salt calibration or sent to Vaisala for service The probe must be recalibrated every time the humidity sensor Humicap is changed 4 2 2 Calibration procedure Connect an ammeter in poles RH and Vw or a volt meter in poles V RH and V according to how the output selection jumpers have been set Connect the power in poles V and Vg gt VAISALA SSD Operating Manual HMP 130Y SERIES 9 20 Humidity and Temperature Transmitters 28th June 1991 HMP130Y 00205 4 3 Calibration Keep the calibrator and the transmitter for at least 30 minutes in the same space so that their temperatures have time to equal ize Place the probe in the calibration hole of the LiC bottle in the Humidity Calibrator HMK 11 Wait for 10 minutes Use potentiometer R5 offset to adjust the output signal to the value given in the calibration table Chapter 4 2 3 Place the probe in the calibration hole of the NaCl bottle in the humidity calibrator Wait for 10 minutes Check that the reading corresponds with the desired accuracy to that given in the calibration table If not use trimmer R18 to adjust the reading Repeat the calibration procedure until the desired accuracy is achieved XX VAISALA HMP 130Y SERIES 10 20 Ee Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 4 2 3 Calibration table
4. 0062 0174 HMP 130Y SERIES 20 20 Humidity and Temperature Transmitters 28th June 1991 HMP130Y 00205 4 3 Mounting flange for the HMP 135Y Membrane filter 18 0 mm HMP 131Y Sintered filter 18 0 mm HMP 132Y Plastic grid 12 0 mm HMP 133Y Sintered filter 12 0 mm HMP 134Y 135Y HUMICAP humidity sensor HMP 13tY 132Y 133Y 134Y HUMICAP humidity sensor HMP 135Y GUARANTEE Vaisala issues a guarantee for the material and workmanship of this product under normal operating conditions for one 1 year from the date of delivery Exceptional operating conditions damage due to careless handling and misapplication will void the guarantee 245 VAISALA HMP 130Y APPENDIX 1 Humidity and Temperature Transmitters SSD Operating Manual 18th September 1989 da CHANGING THE OUTPUT SIGNALS Voltages differing from the standard output can be formed in the usual way by measuring the voltage over a known resistance in current form The internal resistance of the volt meter may however cause errors if it is less than 1000 times the load resistance the size of error without compensation is over 0 1 In the Series HMP 130Y the additional resistance can be placed so that the voltage output is independent of the load Figure 1 The value of the additional resistor can be acquired from the following formula R V 1 x50Q when V is the maximum output in volts in the range of 0 V and the device is connected i
5. 5 Fig 3 Connection of voltage signals Fig 4 Connection of current signals The return wires of current signals can be connected to the negative wire of the power supply in any location or brought to pole V sin Of the screw terminal eve VAISALA HMP 130Y SERIES 6 20 ad Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 ES Fig 5 Recommended connection when the output signals for temperature and humidity are not of the same type gt VAISALA _ SSD Operating Manual HMP 130Y SERIES 7 20 Humidity and Temperature Transmitters 28th June 1991 HMP130Y 00205 4 3 3 TO BE NOTED WHEN MEASURING HUMIDITY It is essential in the measurement of humidity and calibration to reach temperature equilibrium Even a small difference in temper ature between the measured object and the sensor causes an error l the temperature is 20 C 68 F and the relative humidity 50 RH a difference of 1 C between the measured object and the sensor causes an error of 3 RH When the humidity is 90 RH the corresponding error is 6 RH The error is at its greatest when the sensor is colder than the sur roundings and the humidity is high A temperature difference of a few degrees can cause water to condense on the sensor surface In an unventilated space evaporation may take hours ventilation acceler ates evaporation The Humicap sensor starts to function normally as
6. soon as the water has evaporated If the condensed water is con taminated the life span of the sensor may shorten and calibration may change ave VAISALA HMP 130Y SERIES 8 20 tb Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 4 HUMIDITY CALIBRATION 4 4 One point calibration The calibration of the humidity and temperature transmitters of the HMP 130Y series should be checked two or three times a year The interval depends on the operating conditions and the required accu racy Vaisala s Electronic One Point Calibrator HMK 20 is recom mended for the calibration of these instruments eH Connect the HMK 20 to the instrument to be calibrated RH ael O Ea test connector see Figure 1 Make sure the sensors of the ee eels instruments are close to one another and switch on the 2 HMK 20 by pushing the red button in position ON R8 RAB Q gt ASI E Switch the black button in position ARH The indicator now za displays the difference in the RH values given by the two lel Ras devices Wait until the reading stabilizes and adjust the reading to zero with potentiometer R5 Figure 1 Note Due to the sensitivity of the potentiometer Vaisala s calibration screw driver or other plas tic screw driver should be used for one point calibration potentiometer R5 4 2 _ Salt calibration 4 2 1 General If a HMK 20 calibrator is not available the calibration of the instru
7. MP 132Y duct installation HMP 133Y installation in confined spaces HMP 134Y installation in pressurized spaces HMP 135Y installation in high temperatures The HMP 130Y series units incorporate the HUMICAP sensor which uses a unique operating principle based on changes in the capacitance of a thin polymer film as it absorbs water molecules The humidity measuring range is O 100 RH The output signal is selectable among several standard signals The temperature is measured with a Pt 100 sensor See Chapter 6 and Appendix 1 ova VAISALA HMP 130Y SERIES 3 20 nd Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 2 INSTALLATION 2 1 Selection of outputs The transmitters of the HMP 130Y series have a factory setting of 4 20 MA for the temperature and humidity output If the output is changed the jumper locations Figure 1 are changed The error brought by the jumper change is lt 0 15 FS making recalibration usually unnecessary The output signals of the temperature and humidity channels can be selected independent of one another Appendix 1 Note If the temperature output is not used the output selec tion jumper must be in position 0 25 1 25 V HUMICAP Pt 100 R5 Ad OUTPUT SELECTIONS a PLD calibra test connector 4 20mA R14 1 5V 0 25 125 V R22 0 20 MA t tur Output emperature Selections 0 5V humidity He
8. calibration teat connector o Set the Pt 100 simulator at a value within the measuring FB 3 m range e g near the temperatures needed in practice and use trimmer R54 to adjust the reading For example 50 C E 9 in the HMP 135Y in the range of 0 20 mA corresponds to 2 Ol BS current ove ver 50 x 20 mA 6 2 mea AN AO ES MA al SSEREES o E a RH los camector a Kaa and in the HMP 133Y 50 20 a ET x 20 mA 14 mA Note that the lowest limit of the measuring range cannot be used with this adjustment because the smallest reading obtainable in e g the HMP 135Y is approximately 0 1 C ate VAISALA HMP 130Y SERIES 13 20 iy Humidity and Temperature Transmitters _ SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 5 1 3 5 2 Using resistors in the calibration Instead of a Pt 100 simulator resistors whose values have been measured precisely 0 1 15 ppm or better may be used in the calibration of the temperature channel The following table gives some standard values The corresponding current or voltage signals are acquired by applying these to the previously given Chapter 5 1 2 formulas 00 ow Table 2 Standard values for resistors Changing the HUMICAP sensor and the membrane filter Remove the damaged sensor and insert a new one Handle the sensor by the plastic socket DO NOT TOUCH THE SENSOR PLATE Recalibrate the transmitter Replace a dirty membrane f
9. ee a o ee So a o O ee A Race n Boy o a o 7 a Ae ae a i a o a o O ao A oo td y a o ee o oe o SS Cee o e Seas oe Be SS 2 aS ave VAISALA HMP 130Y SERIES 1 20 44 Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 HMP 130Y SERIES HUMIDITY AND TEMPERATURE TRANSMITTERS 1 PRODUCT DESCRIPTION 2 2 INSTALLATION 3 2 1 Selection of outputs l 3 2 2 Mounting 4 2 3 Electrical connections 5 3 TO BE NOTED WHEN MEASURING HUMIDITY 7 4 HUMIDITY CALIBRATION 8 4 1 One point calibration 8 4 2 Salt calibration 8 4 2 1 General 8 4 2 2 Calibration procedure 8 4 2 3 Calibration table 10 5 MAINTENANCE 11 5 1 Adjustment of temperature channel 11 541 1 Basic calibration with a Pt 100 simulator 11 5 1 2 Trimming the nonbiased outputs 12 5 1 3 Using resistors in the calibration 13 5 2 Changing the HUMICAP sensor and the membrane filter 13 6 TECHNICAL DATA 14 7 STANDARD ACCESSORY INSTALLATION FLANGE 18 8 OPTION HPP 130 POWER SUPPLY UNIT 2 ow oa 18 9 SPARE PARTS 20 APPENDIX 1 Changing the output signals ave VAISALA HMP 130Y SERIES 2 20 AY Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 1 PRODUCT DESCRIPTION The HMP 130Y series consists of five humidity and temperature transmitters HMP 131Y wall installation H
10. ernal load for 1 V voltage output Recommended external load for 5 V voltage output Operating temperature electronics HMP 131Y Operating temperature electronics other models Upper limit when HPP 130 power supply in use Storage temperature Measuring range Accuracy HMP130Y 00205 4 3 0 500 Q gt 2 kQ gt 10 kQ 20 60 C 4 140 F 5 60 C 23 140 F 55 C 131 F 40 75 C 40 167 F O 100 RH maximum achievable accuracy when calibrated against high quality certified humidity standards 1 RH 0 90 RH 2 RH 90 100 RH when calibrated against salt solutions DIN 50 008 Temperature dependence of sensor Temperature dependence of electronics Response time 90 at 20 C in still air with sintered filter 2 RH 0 90 RH 3 RH 90 100 RH additional error less than 2 RH over the entire temperature range 10 03 RH C 15 S ae VAISALA HMP 130Y SERIES 16 20 4 Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 Sensor HMP 131Y 132Y 133Y and HUMICAP 0062 HMP 134Y HMP 135Y HUMICAPO 0174 Temperature Measuring range HMP 131Y 20 60 C 4 140 F HMP 132Y 133Y 134Y 20 80 C 4 176 F HMP 135Y 0 160 C 32 320 F Accuracy of electronics at 20 C 0 2 C 68 F Typical temperature depe
11. ilter to ensure a maximum lifetime for the sensor Do not try to clean the sensor or filter eve VAISALA HMP 130Y SERIES 14 20 wb l Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 6 TECHNICAL DATA Mechanics Housing material ABS plastic Housing classification IP 65 NEMA 4 Bushing 5 12 mm i option 8 15 mm Dimensions they 67x92x145 mm Probe lengths See Figure 6 Sensor protection standard HMP 131Y membrane filter part no 2787 18 0 mm HMP 132Y sintered filter part no 6686 O 18 0 mm HMP 133Y membrane filter pan no 10159 12 0 mm HMP 134Y 8 HMP 135Y sintered filter Part No 0195 O 12 0 mm Electronics Connections Screw terminals 0 5 1 5 mm wires AWG 20 16 Output Operating voltage 4 20 mA 114 a 30 VDC 0 20 mA 0 25 1 25 V 11 30 VDC O 1V 1 5V 15 30 VDC 0 5V Powerconsumption A 20 60 MA Factory setting 4 20 mA Other outputs selectable by jumpers Recalibration unnecessary error produced by jumper change lt 0 15 FS Recommended operating voltage the minimum value given above with an increase of 5 V Note If the temperature output is not used the output selec tion jumper must be in position 0 25 1 25 V do VAISALA SSD Operating Manual Relative humidity HMP 130Y SERIES 15 20 Humidity and Temperature Transmitters 28th June 1991 External load for current outputs Recommended ext
12. n current range 0 20 mA To retain the performance characteristics of the instrument without recalibration the accuracy of the additional resistance should be at least 0 1 15 ppm If recalibration facilities exist less accurate metal film resistors can be used For example the range 0 1 6 V 10 mV C for the HMP 135Y is acquired by the resistor value 30 Q and the range 0 10 V by the resistor value 450 Q The smallest recommended load in the range 0 10 V is 20 kQ For minimum operation voltage see operation voltages for current outputs The resistor can be added either on the temperature of humidity channel or both and the resistors in the latter case may be of different size MK 4126 Fig i Connections for changing the voltage outputs
13. ndence of 0 005 C C electronics Linearity of electronics better than 0 05 C Sensor Pt 100 RTD 1 3 DIN 43760B Note The HMP 134Y is designed for a pressure range of 0 10 MPa ae VAISALA _ HMP 130Y SERIES 17 20 Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 HMP 131Y HMP 132Y 65 1600 HMP 133 Y HMP 134 Y MK4361 Fig 6 Dimensions eve VAISALA HMP 130Y SERIES 18 20 wb Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 Fig 7 Mounting Flange for the HMP 135Y 8 OPTION HPP 130 POWER SUPPLY UNIT Fig 8 HPP 130 Power Supply ave VAISALA HMP 130Y SERIES 19 20 a Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 HPP 130 Power Supply Unit is installed as the cover of HMP 130Y series transmitters Supply voltages HPP 130A 24 VAC 10 50 50 Hz HPP 130B 110 VAC 15 50 60 Hz HPP 130C 230 VAC 15 50 60 Hz Output voltage 20 VDC nominal 60 mA Power consumption 1 5 W max Operating temperature 5 55 C Input connections connector 0 5 1 5 mm wires AWG 20 16 Output connections connection cable Feed through PK7 IP 68D 4 7 mm Housing ABS plastic Weight 270g HMP 130Y SERIES HPP 130X 7 MK 4345 Fig 9 Electrical connections 24 VAISALA SSD Operating Manual pee 9 SPARE PARTS 11990 2787 6686 6221 0195
14. t the output signal at its lowest value 4 mA 0 25 V or 1 V Set the Pt 100 simulator in the highest temperature of the tempera ture range of the instrument which is being calibrated and use potentiometer R52 to adjust the output signal at its highest value 20 mA 1 25 V or 5 V Repeat the adjustments if necessary Adjusting potentiometer R48 offset always has an effect on the adjustment of potentiometer R52 gain Adjusting the R52 does not have a significant effect on the adjustment of the R48 atthe tow timit 0 C or 20 C ave VAISALA HMP 130Y SERIES 12 20 Humidity and Temperature Transmitters SSD Operating Manual 28th June 1991 HMP130Y 00205 4 3 If the Pt 100 simulator does not have the limit values of the measur ing range of the instrument which is being calibrated approximate values can be used as follows 150 C 302 F in the HMP 135Y in the range of 4 20 mA corresponds to the current 150 160 20 4 4 mA 19 mA and 50 C 122 F in the HMP 133Y corresponds to the current 50 20 i 100 x 20 4 4 mA 15 2 mA 5 1 2 Trimming the nonbiased outputs The basic calibration Chapter 5 1 1 must be done before the nonbiased outputs 0 20 mA 0 1 V or 0 5 V can be trimmed mere Pemo The measuring arrangements are the same as for the basic calibration Chapter 5 1 1 but the jumpers are set in non oom o biased positions Figure 1 RH
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