HANNA HI 93703 Portable Microprocessor Turbidity Meter Instruction Manual
Contents
1. T x 100 mL Vos T where T new HI 93703 reading T actual turbidity value ofthe original sample 1 FTU21NTU 10 HOW TO ENSUHE ACCURATE MEASURE MENTS Each time the cuvette is used tighten the cap to the same degree Discardthe sample soon afterthe reading is takento avoid permanently cloudingthe glass All glassware used to contain the standards andthe samples should be maintainedclean washed with HI 93703 50 cleaning solution and rinsed with HI 93703 0 or turbidity free water Collectthe samples in clean glass or plastic bottles fit stoppers and perform the analysis quickly If unavoidable store the sample in acool dark place but not for longer than 24 hours the sample needs to be kept at room temperature prior to the analysis To obtain a representative sample gently but thoroughly mix it before samples are taken Do not shake to prevent air bubbles and do not let the sample settle It is recommended to monthly calibrate the meter with the supplied HI 93703 10 10 FTU standard or more frequently for greatest accuracy Before inserting vials into the instrument wipe them with HI 93703 70 soft lint free 4 tissue Handle vials so that no fingerprints can get on the areas where light passes ap proximately 2 cm 1 inch from the bottom of the vial If you experience any problems in taking mea surements please contact your dealer or the nearest Hanna Instruments Customer Serv2. number press the 2 e READ key The de fault blinking param eter is the month on the left hand of the display MM DD TT 13 To confirm the dis played data values and to go to the next bus step press the CAL key once A blinking ZERO message will appear Take the HI 93703 0 bottle containing the ZERO FTU Standard or turbidity free dilu tion water and fillthe measurement cu vette Note In order to minimize any error intro duced by the cuvette it is recommended to use during calibration the same cu vette you are going to use to perform the measurement Insertthe cuvette with the HI 93703 0 ZERO FTU standard solution or turbidity free dilution water intothe measurement cell and press the d CAL key A blinking a SIP message indi _ cates that the instru m ment is performing M H the measurement Af ter approximately 50 seconds the instru s ele t ment will ask for the HI93703 10 standard iin solution 910 FTU v v by displaying 10 0 amp Repeatthe same procedure with HI 93703 10 6 10FTU standard solution gt i 14 Insertthe cuvette with UN the HI 93703 10 AMCO AEPA 1 stan dard 10 FTU into the measurement cell andpressthe CAL key again After the second cali bration point 10 00 sag FTU has been ac cepted the meter will display 500 asking for the 500 FTU solu ti
3. 0 Fax 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 South Africa Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 66 2619 0708 Fax 66 2619 0061 United Kingdom Tel 01525 850 855 Fax 01525 853 668 USA Tel 401 765 7500 Fax 401 765 7575 For e mail contacts and complete list of Sales and Technical offices please see www hannainst com vHgudnuc NvIN 90 80
4. Instruction Manual HI 93703 Portable Microprocessor Turbidity Meter EAMA instruments Dear Customer Thank you for choosing a HANNA instruments product Please read this instruction manual carefully before using the instrument This manual will provide you with all the neces sary information for the correct use of the instrument If you need additional technical information do not hesitate to e mail us at tech hannainst com This instrument is in compliance with the C directives TABLE OF CONTENTS Preliminary examination 3 General description sss 3 Principle of operation 5 Functional description 6 7 Operational guide 8 Measurement procedure 8 Howto ensure accurate measurements 11 Sources of interferences 12 Calibration iei ettet tins t 13 Calibration procedure 13 How to ensure accurate calibration 16 Standard suspension 17 Viewing the calibration date 17 Battery replacement 18 LCD and error messages 20 ACCESSO Sann aoaie e 22 EE EE A E E TE 22 CE declaration of conformity 23 2 PRELIMINARY EXAMINATION Remove the instrument from the packing material and
5. day of last calibration SPECIFICATIONS Range 0 00 to 50 00 FTU 50 to 1000 FTU Resolution 0 01 and 1 FTU Accuracy 0 5 FTU or 5 of reading whichever is greater Typical EMC Deviation 2 FS Calibration 3 point 0 10 and 500 FTU Light Source Infrared LED Light Source Life Life of the instrument Light Detector Silicon Photocell Battery Type 4 x 1 5V AA alkaline Battery Life Approx 60 hours of use or 900 measurements Auto off After 5 minutes of non use Environment 0 to 50 C 32 to 122 F RH max 9595 non condensing Dimensions 220 x 82 x 66 mm 8 7 x 3 2 x 2 6 Weight 510 g 1 1 Ib 1 FTU 1NTU OPERATIONAL GUIDE To prepare the instrument for taking measurements first install the batteries see Battery Replacement section on page 17 and then turn the instrument on To maximize the battery life the meter is automatically switched off after 5 minutes of non use To reactivate it simply press the ON OFF key MEASUREMENT PROCEDUHE Turn the meter on by pressingthe ON OFF o id a The meter will carry outa self test display ooo ing a full setof figures e uuu Afterthetest theLCD tsss willchangetothe mea surement mode When the LCD dis plays the meter is ready to measure Fillacleancuvette up to one quarter inch 0 5 cm from its rim with the thoroughly B agitated sample Allow sufficient ti
6. evial A l 16 STANDARD SUSPENSION Presently there are only two recognized pri mary standards AMCO AEPA 1 andformazine HANNA instruments supplies HI 93703 with the AMCO AEPA 1 which has a much longer shelf life at all concentrations approximately six months iffree from contamination In addition no special handling or disposal is required and a much higher stability of suspended particles has been observed On the other hand formazine is a very toxic substance generated by a known carcinogen its stability is poor particles flocculate and settle quickly Lower concentrations change value within a few days or hours after dilution from stock solutions The consistency of HI 93703 readings by using both standards has been separately estab lished by Advanced Polymer Systems and HANNA instruments Additional documentation aboutthe formazine standard and more complex calibration proce dures is available upon request VIEWING THE CALIBRATION DATE Turnthe meter on and wait for the display to show 9 Press and hold the 2 2 DATE gt key and a MM DD message appears while the key 2 e is held Note The displayed date is the date that was input by the user at the beginning of the last calibration 17 BATTERY REPLACEMENT All components have been selected to mini mize current drain withoutcompromising func tionality In order to minimize the battery con
7. examine it to make sure that no damage has occurred during shipping If there is any damage notify your dealer HI 93703 is supplied complete with Glass cuvet with cap Batteries 4 x 1 5V AA and instructions HI 93703C is a complete kit supplied with 2glass cuvets with caps Batteries 4 1 5V AA and instructions HI 93703 0 amp HI 93703 10 cal solutions HI 93703 50 cleaning solution Tissue for wiping cuvets Ruggedcarrying case Note Save all packing material until you are sure that the meter functions correctly All defective items must be returned in its original packaging with the supplied accessories GENERAL DESCRIPTION With HI 93703 turbidity measurements can be performed with high precision in the field as well as in the laboratory HI 93703 turbidity meter is a portable microprocessor based instrument used to determine the turbidity of water and wastewater The meter covers a0 to 1000 FTU range in two scales 0 00 to 50 00 FTU and 500 1000 FTU The auto ranging feature sets the appropriate rangeforthe measurement HI 93703 has been designed according to the 1807027 International Standard consequently the turbidity unit is the FTU Formazine Turbidity Unit FTU is equivalent to the other internationally recognized unit NTU Nephelometric Turbidity Unit 3 The meter housing is a rugged and lightweight case with an easy to read LCD To save battery life the instrumentis equipped with a
8. ice Department 1 FTU2 1 NTU SOURCES OFINTERFERENCE Presenceoffloating debris and coarse sedi ments which settle out rapidly will give false readings The infrared light source used for HI 93703 turbidity meter according to ISO 7027 Inter national Standard can effectively minimize errors due to colored dissolved substances This effect named true color is acommon interference for most commercially available instruments operating in the range of visible light Air bubbles and the effect of vibrations that disturb the surface of the sample will give false results Dirty glassware could also affect readings along with scratched or edged vials 12 CALIBRATION A monthly calibration is recommended To check the date of last calibration simply hold the DATE key down for few seconds A more frequent check of the instrument is suggested by using the supplied standard solu tion CALIBRATION PROCEDURE Turnthe meter on and wait for the display to show Press the CAL key once the CAL mes sage will blink on the display for about 6 seconds then the calibration mode stops e Whilethe CAL mes sage is still blinking press CAL again The instrument is now in the calibration mode and a CL will ap pearonthe lower part of the display The date of calibration can be edited now by sim zi ply pressing the DATE gt key To scroll to the correct
9. me for bubbles to escape before securing the cap Wipethecuvette thor oughly with a lint free tissue HI 93703 70 before inserting into the measurement cell The cuvette must be completely free of fingerprints and other oil or dirt particularly in the area where the light goes through ap proximately the bot tom 2 cm 1 inch of the cuvette Place the cuvette into the cell and check that the notch on the cap is posi tioned securely into the groove The mark on the cuvette cap should point towards the LCD Press the READ T key and the LCD will display a blinking SIP Sampling in Process The tur bidity value will ap pear after approxi mately 25 seconds o s Even though HI93703 covers a very wide range of turbidity values for very accurate measurements of samples exceeding 40 FTU Standard Methods require dilu tion In such cases the correct amount of HI 93703 0 or turbidity free water to be added to the sample can be calculated as follows Vos 3000 T where Vos volume of sample mL to be combined with HI 93703 0 to obtain the final volume of 100 mL HI 93703 reading exceeding 40FTU E g HI 93703 reading 200 FTU 3000 200 15 mL Vos 15 mL Vos 85 mL HI 93703 0 0 mL T At this point take a sample of this solution and measure turbidity The correct turbidity value of the original sample will be
10. med Calibration mode is active Ifthe CAL key is not pressed within 6 seconds the meter will automatically switch to the measurement mode Calibration date setting mode is active 0 FTU standardfor calibra tion is required Calibration is in progress 10 FTU standard for cali brationis required Last calibration date MM DD 20 Sample In Progress measurementis being per formed Low battery when this mes sage appears the instru ment can still perform approx 50 measurements Batteries are too weak to ensure reliable measure ments This message ap pears for a few seconds then the meter will auto matically switch off Bat teries must be replaced immediately 1FTU 1NTU 21 ACCESSORIES HI 731318 Tissueforwiping cuvets 4 pcs HI 731321 Spare glass cuvet 4 pcs HI 731313 Maintenance kit rugged carrying case including HI 93703 0 and HI 93703 10 calibration solutions HI 93703 50 cuvet cleaning solution 1 tissue for wiping cuvets and 2 cuvets HI 93703 0 AMCO AEPA 1 Q0 FTU calibration solution 30 mL HI 93703 05 AMCO AEPA 1 0500 FTU calibration solution 30 mL HI 93703 10 AMCO AEPA 1 10 FTU calibration solution 30 mL HI 93703 50 Cuvet cleaning solution 230 mL WARRANTY All Hanna Instruments meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions This warrant
11. n automatic shut off feature which is activated after 4 minutes of non use The meter is very simple to use all operations can be carried out with only four keys and troubleshooting functions can be performed with displayed error code guides An exclusive positive locking system guaran tees that the cuvet is firmly placed in the cell The keypadis water resistant and can be wiped with a moist cloth for quick cleanups The one point calibration at 10 FTU can be easily performed using the available stan dard In addition HI 93703 is the first por table turbidity meter that allows to store the last calibration date and to retrieve it at the user s convenience HANNA instruments has chosen 10 FTU as the calibration point because it is the value that best fits the water turbidity measure ments in different applications from drink ing water to wastewater treatment HANNA instruments uses the primary standard AMCO AEPA 1 to avoid all formazine related problems Formazine is a very toxic unstable substance which requires particular care its standards have to be prepared only afew min utes before performingthe calibration and can notbe reused because oftheir short life Hanna Instruments standards are extremely stable can be reused and last up to six months if free from contamination HI 93703 can be used with both standards 1 FTU 1NTU PRINCIPLE OF OPERATION HI 93703 has been designed to perform mea surements acco
12. on to be placed in the cuvet holder Note At this point the user can exit the calibration mode and save the two point calibration by pressing READ To perform a three point calibration place the 500 FTU standard solution in the cuvet holder CL will start blink Press CAL SIP and ing Pie EL 30 seconds the dis play will show After approximately Now the meter is calibrated and ready for use Note If ERR1 is displayed the calibration data are maintained 1FTU 1NTU HOW TO ENSURE ACCURATE CALIBRA TION Theinstructions listed below should be carefully followed during testing and during calibration All glassware that comes into contact with standards should be maintained clean Wash with HI 93703 50 cleaning solution and rinse with HI 93703 0 or turbidity free water e Rinse the vial twice with 5 ml of the liquid to be tested This removes the effect of any previous liquid and any dustorforeign matter that may be present inside Gently pour the liquid down the side of the vial to reduce air bubbles no mixing is required when HI 93703 0 and HI 93703 10 AMCO AEPA 1 stan dards are used Beforeinsertingthe vial into the instrument a wipe it with HI 93703 7O soft lint freetissue Handle vials so that fingerprints can geton the areas where light passes approx 2 cm 1 from the bottom of th
13. rding to the ISO 7027 Interna tional Standard Theinstrumentfunctions by passing a beam of infraredlightthrough a vial containingthe sample being measured The light source is a High Emission Infrared LED with a wavelength peaking at 890 nm ensuring that the interference caused by col ored samples is minimum A sensor positioned at 90 with respect to the direction of light detects the amount of light scattered by the undissolved particles present in the sample The microprocessor converts such readings into FTU values LIGHT DETECTOR IR LED 1 90 SCATTERED AN EMITTED LIGHT 890 nm HIGHT Le I VLA CUVET As noted above FTU unit is equal to the NTU unit However there are other known measure ment units for turbidity Jackson Turbidity Unit JTU based on the old method of Jackson s candle and Silica Unit mg L of SIO For your reference the conversion table between these measurement units is shown below FTU NTU SiO mg L JTU 19 2 5 FTU NTU 1 0 13 SiO mg L 7 5 1 1 FTU2 1 NTU FUNCTIONAL DESCRIPTION MICMOPWOC 409 MRRONY METER 1 Measurementcell 2 LCD Liquid Crystal Display 3 ON OFF key 4 CAL key to enter the calibration mode 5 READ T key to perform measurements and to set the date day and month of the last calibration 6 DATE gt key to display the last calibration date and to select either the month or the
14. ss B EN61010 1 Safety requirements for electrical equipment for measurement control and laboratory use ee ex Date of Issue 27 11 1998 6 m P Cesa Technical Director On behalf of Hanna Instruments S r 1 Recommendations for Users Before using this product make sure that it is entirely suitable for the environment in which it is used Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments requiring the operator to take all necessary steps to correct interferences Any variation introduced by the user to the supplied equipment may degrade the instrument s EMC performance To avoid electrical shock do not use this instrument when voltages at the measurement surface exceed 24 Vac or 60 Vdc To avoid damages or burns do not perform any measurement in microwave ovens Hanna Instruments reserves the right to modify the design construction and appear ance of its products without advance notice SALES amp TECHNICAL SERVICE CONTACTS Australia Tel 03 9769 0666 Fax 03 9769 0699 China Tel 10 88570068 Fax 10 88570060 Egypt Tel amp Fax 02 2758 683 Germany Tel 07851 9129 0 Fax 07851 9129 99 Greece Tel 210 823 5192 Fax 210 884 0210 Indonesia Tel 21 4584 2941 Fax 21 4584 2942 Japan Tel 03 3258 9565 Fax 03 3258 9567 Korea Tel 02 2278 5147 Fax 02 2264 1729 Malaysia Tel 603 5638 994
15. sumption the meter is equipped with an auto off function which switches the meter off after 5 minutes of non use The power source are 4 alkaline batteries 1 5V AA with an expected life of 60 hours or 900 measurements To always grant accurate measurements the batteries are monitoredto ensure that readings are not taken when there is insufficient power A LO BAT indication will appear on the lower rightcornerofthe display whenthe batteries are weakand require replacement The instrument can still perform approx 50 measurements A BA indication will appear on the display when the batteries are too weak to perform reliable measurements The message appears for a few seconds and then the meter will automatically switch off Batteries must be immediately replaced Battery replacement must only take place in a safe area andusing the battery types specified in this instruction manual To install or replace the batteries turn the unit off and unscrew the 2 screws located on the back of the meter Remove the battery cover andinsertthe new batteries in the compartment while paying attention to the po larity After the batteries have been installed close the battery cover and tighten the 2 screws LCD AND ERRORMESSAGES HI 93703 will display several different LCD messagesto helpthe userthroughout all opera 1FTUZ21NTU The meter is in a ready state andmeasurementor calibra tion can be perfor
16. y is limited to repair or replacement free of charge Damages due to acci dents misuse tampering or lack of prescribed mainte nance are not covered If service is required contact the dealer from whom you purchased the instrument If under warranty report the model number date of purchase serial number and the nature of the failure First obtain a Returned Goods Authorization number from the Customer Service department then return the instru ment with the Authorization included along with ship ment costs prepaid If the repair is not covered by the warranty you will be notified of the charges When shipping any instrument make sure it is properly pack aged for complete protection All rights are reserved Reproduction in whole or in part is prohibited without the written consent of the copyright owner 1FTU 1NTU 22 CE DECLARATION OF CONFORMITY TENN instruments 6 6 DECLARATION OF CONFORMITY We Hanna Instruments Italia Srl via E Fermi 10 35030 Sarmeola di Rubano PD ITALY herewith certify that the turbidity meter HI 93703 has been tested and found to be in compliance with EMC Directive 89 336 EEC and Low Voltage Directive 73 23 EEC according to the following applicable normatives EN 50082 1 Electromagnetic Compatibility Generic Immunity Standard IEC 801 2 Electrostatic Discharge TEC 801 3 RF Radiated EN 50081 1 Electromagnetic Compatibility Generic Emission Standard EN 55022 Radiated Cla
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