Instruction Manual HI 96711C Free and Total Chlorine ISM 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. TABLE OF CONTENTS PRELIMINARY EXAMINATION ................................................................................................ 4 GENERAL DESCRIPTION .................................................
PRELIMINARY EXAMINATION GENERAL DESCRIPTION Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occurred during shipment, please notify your Dealer.
SPECIFICATIONS PRINCIPLE OF OPERATION 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 Accuracy ±0.03 mg/L ±3% of reading @ 25°C Typical EMC Deviation ±0.01 mg/L Light Source Tungsten lamp Light Detector Silicon Photocell with narrow band interference filter @ 525nm. Method Adaptation of the USEPA method 330.5 and Standard Method 4500-Cl G. The reaction between chlorine and the DPD reagent causes a pink tint in the sample.
A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvette. The optical path is fixed by the diameter of the cuvette. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity Io or I. The photoelectric cell collects the radiation I that is not absorbed by the sample and converts it into an electric current, producing a potential in the mV range.
DISPLAY ELEMENTS DESCRIPTION 5 ERRORS AND WARNINGS 6 7 4 8 The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. The beeper is playing a beep on errors. 3 9 a) on zero reading 2 10 1 Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvette.
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 cuvette for reference (zero) and measurement. Over Range: A flashing value of the maximum concentration indicates an over range condition. The concentration of the sample is beyond the programmed range: dilute the sample and re-run the test. c) during calibration procedure Battery low: The battery must be replaced soon.
• It is important that the sample does not contain any debris. This would corrupt the reading. STARTUP • Each time the cuvette is used, the cap must be tightened to the same degree. Prepare the instrument for measurement as follows: • Unpack the instrument by removing the dust protection sleeve from the instrument cuvette holder. • Place the battery in the instrument as described in the “BATTERY REPLACEMENT” chapter. • Place the instrument on a flat table.
MEASUREMENT PROCEDURE To compensate the meter for the sample turbidity or color, the measurement takes place in two phases. First, the meter is zeroed using the unreacted sample. After the reagents are added the reacted sample is measured. Important note: Free and Total Chlorine have to be measured separately with fresh unreacted samples if both values are requested. • Turn the meter on by pressing ON/OFF. The display briefly shows all tags on.
• At the end of measurement, the instrument directly displays concentration in mg/L of free or total chlorine and the range number on the LCD. • Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase.
CALIBRATION PROCEDURE Note: It is possible to interrupt calibration procedure at any time by pressing CAL CHECK or ON/OFF keys. Warning: Do not calibrate the instrument with standard solutions other than the HANNA CAL CHECKTM Standards, otherwise erroneous results will be obtained. When calibrating, only the selected range is affected. • Remove the cuvette.
DATE INPUT GLP • Press RANGE/GLP/ to edit the desired year (2009-2099). If the key is kept pressed, the year number is automatically increased. In GLP mode, the last user calibration date can be verified and the factory calibration can be restored. or LAST CALIBRATION DATE • When the correct year has been set, press ZERO/CFM or READ/ /TIMER to confirm. Now the display will show the month blinking. To display the calibration date: • Press and hold for three seconds RANGE/GLP/ to enter GLP mode.
ACCESORIES BATTERY MANAGEMENT To save battery, the instrument shuts down after 10 minutes of non-use in measurement mode and after 1 hour of non-use in calibration mode. If a valid measurement was displayed before auto shut off, the value is displayed when the instrument is switched on. The blinking “ZERO” means that a new zero has to be performed. One fresh battery lasts for around 750 measurements, depending on the light level.
WARRANTY HI 96711 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.
Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Technical Support for Customers Tel. (800) 426 6287 Fax (401) 765 7575 E-mail tech@hannainst.com www.hannainst.
