Instruction Manual HI 95711C Free & Total Chlorine ISM w w . h a n n 24 a i n s t . c o m MAN95711R3 05/06 w 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) TABLE OF CONTENTS PRELIMINARY EXAMINATION ............................................................
HANNA LITERATURE PRELIMINARY EXAMINATION Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently covers areas such as: • Water Treatment • Process • Swimming Pools • Agriculture • Food • Laboratory and many others. New reference material is constantly being added to the library. Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occured during shipment, please notify your Dealer.
GENERAL DESCRIPTION CE DECLARATION OF CONFORMITY The HI 95711 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.
BATTERY REPLACEMENT SPECIFICATIONS Battery replacement must only take place in a non-hazardous area. Simply slide off the battery cover on the back of the meter. Detach the battery from the terminals and attach a fresh 9V battery while paying attention to the correct polarity. Insert the battery and replace the cover. Free Cl2 0.00 to 5.00 mg/L Total Cl2 0.00 to 5.00 mg/L Resolution 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 mg/L above 3.50 mg/L Precision ±0.02 mg/L @ 1.00 mg/L Typical EMC Deviation ±0.
PRINCIPLE OF OPERATION 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.
• Press READ/TIMER and “SIP” will blink on the display. • The instrument will show for three seconds the CAL CHECK™ standard value. Then the date of last calibration (e.g.: “01.08”) appears on the display, or “01.01” if the factory calibration was selected. In both cases the number of the month is blinking, ready for date input. Note: if display will show “ERR” the calibration procedure failed.
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). • READ/TIMER: this is a bi-functional key, just press for making a measurement, or hold the key for 3 seconds to start a pre-programmed countdown prior to measurement.
VALIDATION PROCEDURE GUIDE TO DISPLAY CODES Use the validation procedure to ensure that the instrument is properly calibrated. Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna CAL CHECK™ Standards, otherwise erroneous results will be obtained. This prompt appears for 1 second each time the instrument is turned on. Temperature correction for Validation: corrected value = read value × [1 + 0.002 × (20 − T(°C))] corrected value = read value × [1 + 0.
The flashing digits indicate that: 1) the month can be set 2) the day can be set “Storage”: this prompt appears for 1 second at the end of the calibration procedure, to indicate that the calibration data has been stored. “Error”: the concentration of the calibration solution used is not correct. Repeat the calibration procedure with the right standard solution, and verify it is not expired. If the calibration procedure fails again, contact your dealer or the nearest Hanna Customer Service Center.
MEASUREMENT PROCEDURE Under range. A blinking "0.00" indicates that the sample absorbs less light than the zero reference. Check the procedure and make sure you use the same cuvet for reference (zero) and measurement. • Select the parameter code for free chlorine “701” ot total chlorine “711” by holding ZERO/SET (see pag. 13). A flashing value of the maximum concentration indicates an over range condition.
• It is important that the sample does not contain any debris. This would corrupt the reading. OPERATIONAL GUIDE • Each time the cuvet is used, the cap must be tightened to the same degree. • Turn the meter on by pressing ON/OFF. • Whenever the cuvet is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion.
