Instruction Manual HI 95734C Free & Total Chlorine High Range ISM MAN95734R3 07/06 w w w . h a n n 24 a i n s t . c o m This Instrument is in Compliance with the CE Directives www.hannainst.
Dear Customer, 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. This instrument is in compliance with directives. USER NOTES Date Parameter Code Validation Value (mg/L) yes Passed not Calibration yes not TABLE OF CONTENTS PRELIMINARY EXAMINATION ......................
WARRANTY PRELIMINARY EXAMINATION HI 95734 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact your dealer. If under warranty, report the model number, date of purchase, serial number and the nature of the failure.
GENERAL DESCRIPTION BATTERY REPLACEMENT The HI 95734 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s years of experience as a manufacturer of analytical instruments. It has the advanced optical system based on a special tungsten lamp and a narrow band interference filter that allows most accurate and repeatable readings. All instruments are factory calibrated and the electronic and optical design minimizes the need of frequent calibration.
SPECIFICATIONS FACTORY CALIBRATION RESET It is possible to restore factory calibration: • Enter the calibration mode by holding CAL CHECK for three seconds. • Hold ZERO/SET for 10 seconds. The display will show for 2 seconds “F.CAL” and the parameter code ("734f" or “734t”) appears. The factory calibration is automatically restored and the instrument is ready for measurement. Dimensions Weight Free Cl2 0.00 to 10.00 mg/L Total Cl2 0.00 to 10.00 mg/L 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 mg/L above 3.
PRINCIPLE OF OPERATION • Press READ/TIMER and “SIP” will blink during measurement. Absorption of Light is a typical phenomenon of interaction between electromagnetic radiation and matter. When a light beam crosses a substance, some of the radiation may be absorbed by atoms, molecules or crystal lattices.
CALIBRATION PROCEDURE Note: it is possible to interrupt calibration procedure at any time by pressing ON/OFF. Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna CAL CHECK™ Standards, otherwise erroneous results will be obtained. For accurate Validation and Calibration results, please perform test at room temperature: 18 to 25°C (64.5 to 77.0°F).
FUNCTIONAL DESCRIPTION VALIDATION PROCEDURE 1) 2) 3) 4) 5) 6) 7) Liquid Crystal Display (LCD) Cuvet Holder Cuvet alignment indicator ON/OFF key ZERO/SET key READ/TIMER key CAL CHECK key KEYPAD DESCRIPTION • ON/OFF: to turn the meter on and off. • ZERO/SET: this is a bi-functional key: press to zero the meter prior to measurement, or hold the key for 3 seconds to select the desired parameter (free or total chlorine).
for Total Chlorine only • Only in the case of total chlorine measurement, add 3 drops of HI 93734C-0 reagent to the cuvet. • For both free and total chlorine, add the content of one packet of HI 93701-0 Free Chlorine reagent. Replace the cap and shake gently for 20 seconds (or 2 minutes in case of seawater analysis). DISPLAY ELEMENTS DESCRIPTION 1) 2) 3) 4) • Replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. four digit main display area.
The blinking "BAT" indicates that the battery voltage is getting low and the battery needs to be replaced. MEASUREMENT PROCEDURE 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. • Select the parameter code for free chlorine “734f” or total chlorine “734t” by holding ZERO/SET (see page 14). “Configuration”: this indicates that the meter has lost its configuration.
OPERATIONAL GUIDE ERROR MESSAGES a) on zero reading • Turn the meter on by pressing ON/OFF. This indicates that the zeroing procedure failed due to a low signal-tonoise ratio. In this case press ZERO again. • When the LCD displays “734f” or “734t” it is ready. The display code that appears is the one of the last selected parameter. Code 734f 734t or Parameter Free Chlorine Total Chlorine “No Light”: the instrument cannot adjust the light level.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT The instructions listed below should be carefully followed during testing to ensure best accuracy. • For a correct filling of the cuvet: the liquid in the cuvet forms a convexity on the top; the bottom of this convexity must be at the same level of the 10 mL mark. • Proper use of the dropper: (a) to get good reproducible results, tap the dropper on the table for several times and wipe the outside of the dropper tip with a cloth.
