User manual HANNA INSTRUMENTS HI 96751C

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[. . . ] Instruction Manual HI 96751C Sulfate 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. 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. PRELIMINARY EXAMINATION Please examine this product carefully. [. . . ] OPERATING MODES · Measurement mode: default operation mode, enables both validation and measurement. · Calibration mode: may be entered by keeping CAL CHECK pressed for three seconds (the "CAL" tag appears), it enables calibration of the instrument. · GLP mode may be entered by pressing GLP/ ("GLP" appears), it enables consulting of user calibration date or restore factory calibration. DISPLAY ELEMENTS DESCRIPTION 5 4 3 9 2 1 10 6 7 8 ERRORS AND WARNINGS The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. a) on zero reading Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvette. Light Low: There is not enough light to perform a measurement. Please check the preparation of the zero cuvette. No Light:The instrument cannot adjust the light level. Please check that the sample does not contain any debris. b) on sample reading Inverted cuvettes: The sample and the zero cuvette are inverted. 1) The measuring scheme (lamp, cuvette, detector), appears during different phases of zero or reading measurement 2) Error messages and warnings 3) The battery icon shows the charging level of the battery 4) The hourglass appears when an internal checking is in progress 5) Status messages 6) The chronometer appears when the reaction timer is running 7) The month, day and date icons appear when a date is displayed 8) Four digit main display 9) Measuring units 10) Four digit secondary display 8 Zero: A zero reading was not taken. Follow the instructions of the measurement procedure for zeroing the meter. 9 Under range: A blinking "0" 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. Battery low: The battery must be replaced soon. 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. Dead battery: This indicates that the battery is dead and must be replaced. Once this indication is displayed, the meter will lock up. As a general rule of thumb, they should be doubled at 10°C (50°F) and halved at 30°C (86°F). · 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. · 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. 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. · Place the instrument on a flat table. · Do not place the instrument under direct sun light. · Press ZERO/CFM and the lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. 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. · Turn the meter on by pressing ON/OFF. [. . . ] 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. The remaining battery capacity is evaluated at the instrument startup and after each measurement. The instrument displays a battery indicator with three levels as follows: · 3 lines for 100 % capacity · 2 lines for 66 % capacity · 1 line for 33 % capacity · Battery icon blinking if the capacity is under 10 %. [. . . ]

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