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Instruction Manual
HI 95771C
Chlorine
Ultra High Range
ISM
This Instrument is in
www.hannainst.com
www.hannainst.com Compliance with the CE Directives
MAN95771CR3 06/06
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Dear Customer, USER NOTES Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. Date Parameter Code Validation Value Passed Calibration This instrument is in compliance with directives. 771 (mg/L) yes not yes not TABLE OF CONTENTS PRELIMINARY EXAMINAT
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CE DECLARATION OF CONFORMITY PRELIMINARY EXAMINATION Please examine this product carefully. Make sure that the instrument is not damaged. If any damage Recommendations for Users occured during shipment, please notify your Dealer. Before using these products, make sure that they are entirely suitable for your specific application Each HI 95771 Ion Selective Meter is supplied complete with: and for the environment in which they are used. • Two Sample Cuvets and Caps Operation of these instruments
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FACTORY CALIBRATION RESET GENERAL DESCRIPTION It is possible to restore factory calibration: The HI 95771 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s • Enter the calibration mode by holding CAL CHECK years of experience as a manufacturer of analytical instruments. It has the advanced optical for three seconds. system based on a special tungsten lamp and a narrow band interference filter that allows most • Hold ZERO/SET for 10 seconds. The display accurate and r
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• Press READ/TIMER and “SIP” will blink during SPECIFICATIONS measurement. for 771 Chlorine ULTRA HIGH RANGE • The instrument will show for three seconds the Range 0 to 500 mg/L CAL CHECK™ standard value, i.e. 100 for “771” or chlorine ULTRA HIGH RANGE or 1.00 for “701” Resolution 1 mg/L from 0 to 200 mg/L; 10 mg/L above 200 mg/L chlorine LOW RANGE. Precision ±2 mg/L @ 100 mg/L Then the date of last calibration (e.g.: Typical EMC Deviation ±1 mg/L “01.08”) appears on the display, or “01.01” or i
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PRECISION AND ACCURACY CALIBRATION PROCEDURE Note: It is possible to interrupt calibration procedure at any time by pressing ON/OFF. Precision is how closely repeated Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna measurements agree with each other. Precision CAL CHECK™ Standards, otherwise erroneous results will be obtained. For accurate Validation and is usually expressed as standard deviation (SD). Calibration results, please perform test at
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• Select the parameter code “771” for chlorine Photometric chemical analysis is based on the possibility to develop an absorbing compound from a ULTRA HIGH RANGE or “701” for chlorine specific chemical reaction between sample and reagents. Given that the absorption of a compound LOW RANGE by holding ZERO/SET (see page 13). strictly depends on the wavelength of the incident light beam, a narrow spectral bandwidth should be selected as well as a proper central wavelength to optimize measurements.
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• Hold READ/TIMER for three seconds. The FUNCTIONAL DESCRIPTION display will show the countdown prior to measurement. Alternatively, wait for 1 minute and just 1) Liquid Crystal Display press READ/TIMER. or 2) Cuvet Holder In both cases “SIP” will blink during 3) Cuvet alignment indicator measurement. 4) ON/OFF key • The instrument directly displays concentration 5) ZERO/SET key in mg/L of free chlorine on the Liquid 6) READ/TIMER key Crystal Display. 7) CAL CHECK key INTERFERENCES - • Alkalinit
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DISPLAY ELEMENTS DESCRIPTION MEASUREMENT PROCEDURE MEASUREMENT PROCEDURE FOR 701 Warning Warning Warning Warning Warning: if the Chlorine Low Range reagent is added to a sample with high chlorine concentration, the color formed can be rapidly bleached, resulting erroneous low readings. • Select the parameter code “701” for Chlorine LOW RANGE by holding ZERO/SET (see page 13). 1) four digit main display area. 2) CAL: appears when the instrument operates in the calibration mode. • When the LCD dis
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The blinking "BAT" indicates that the battery voltage is getting low and the battery needs to be replaced. • Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. This indicates that the battery is dead and must be replaced. Once this indication is displayed, the meter will lock up. Change the battery and restart. • Hold READ/TIMER for three seconds. The display will show the countdown prior to “Configuration”: this indicates that the mete
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ERROR MESSAGES MEASUREMENT PROCEDURE a) on zero reading MEASUREMENT PROCEDURE FOR 771 • Select the parameter code “771” for Chlorine This indicates that the zeroing procedure failed due to a low signal- ULTRA HIGH RANGE by holding ZERO/SET to-noise ratio. In this case press ZERO again. (see page 13). “No Light”: the instrument cannot adjust the light level. Please check that the sample does not contain any debris. • When the LCD displays “771”, it is ready. “Light Low”: there is not enough ligh
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• Do not let the reacted sample stand too long after reagent is added, or accuracy will be lost. GENERAL TIPS FOR AN ACCURATE MEASUREMENT • It is possible to take multiple readings in a row, but it is recommended to take a new zero The instructions listed below should be carefully followed during testing to ensure best accuracy. reading for each sample and to use the same cuvet for zeroing and measurement. • After the reading it is important to discard immediately the sample, otherwise the glass
