User manual HANNA INSTRUMENTS HI 96710C

[. . . ] Instruction Manual HI 96710C pH & Chlorine ISM www. hannainst. com 1 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. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · In order to maximize accuracy, prior to a measurement follow the validation procedure to be sure that the instrument is properly calibrated. If necessary, calibrate the instrument. STARTUP 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. · Do not place the instrument under direct sun light. 13 RANGE SELECTION The HI 96710 can measure pH when range P1 is selected, Free Chlorine when range P2 is selected or Total Chlorine when range P3 is selected. To change the active range follow the procedure: · Turn the meter on by pressing ON/OFF. · After startup, the range identification number is displayed on the secondary LCD as P1, P2 or P3. Code P1 P2 P3 Parameter pH Free Chlorine Total Chlorine · Press RANGE/GLP/ to change the range. The range can be changed any time when the instrument is in measurement mode. The selected range is memorized and the selection remaines unchanged at power off or when the battery is removed. MEASUREMENT PROCEDURE To compensate the meter for the sample turbidity or color, the measurement takes place in two phases. Important note: Free and Total Chlorine have to be measured separately with fresh unreacted samples if both values are requested. The display briefly shows all tags on. 14 · When the beeper sounds briefly and the LCD displays dashes, the meter is ready. The blinking "ZERO" indicates that the instrument needs to be zeroed first. pH MEASUREMENT · Fill the cuvette with 10 mL of unreacted sample, up to the mark, and replace the cap. · Place the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. · Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. · After a few seconds, the display will show "-0. 0-". · Remove the cuvette and add 5 drops of the HI 93710-0 Phenol Red Indicator. · Replace the cuvette into the cuvette holder and ensure that the notch on the cap is positioned securely into the groove. The lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. · The instrument directly displays the pH measured value on the Liquid Crystal Display. FREE CHLORINE MEASUREMENT · Fill the cuvette up to the mark with 10 mL of unreacted sample and replace the cap. · Place the cuvette into the holder and ensure that the notch on the cap is positioned securely into the groove. [. . . ] · Press ZERO/CFM to restore the factory calibration or press RANGE/GLP/ again to abort factory calibration restore. · The instrument briefly notifies "donE" upon restoration of factory calibration prior to returning to measurement mode. 24 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. [. . . ]