User manual HANNA INSTRUMENTS HI 96753C

[. . . ] Instruction Manual HI 96753C Chloride 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. PRELIMINARY EXAMINATION Please examine this product carefully. Each HI 96753 Ion Selective Meter is supplied complete with: · Two Sample Cuvettes and Caps · CAL CHECK standard cuvettes · 9V Battery · Cloth for wiping cuvettes · Instrument quality certificate · Instruction Manual · Rigid carrying case TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 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. 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. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette. · Do not let the reacted sample stand too long after reagent is added, or accuracy will be lost. · It is possible to take multiple readings in a row, but it is recommended to take a new zero reading for each sample and to use the same cuvette for zeroing and measurement. · After the reading it is important to discard immediately the sample, otherwise the glass might become permanently stained. · All the reaction times reported in this manual are referred to 20°C (68°F). 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. · 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. · Fill one cuvette (#1) with 10 mL of distilled water (up to the mark). · Fill another cuvette (#2) with 10 mL of sample (up to the mark) Note: for low chloride ions concentration, rinse the cuvette a couple of times with sample before filling it with 10 mL of sample (up to the mark). Note: for most accurate results, use two graduated pipettes to deliver exactly 10 mL of distilled water and 10 mL of sample to the cuvettes. · Using the 1 mL syringe, add 0. 5 mL of HI 93753A-0 Displacing Reagent to each cuvette. · Replace the caps and mix each cuvette by turning the cuvette upside down for approximately 30 seconds. 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. MEASUREMENT PROCEDURE To compensate the meter for the sample turbidity or color, the measurement takes place in two phases. The display briefly shows all tags on. 12 13 · Remove the caps and use the second 1 mL syringe to add 0. 5 mL of HI 93753B-0 Complexing Reagent to each cuvette. · Press READ/ /TIMER. The lamp, cuvette and detector icons will appear on the display, depending on the measurement phase. · At the end of measurement, the instrument directly displays concentration in mg/L of chloride on the LCD. INTERFERENCES The pH of sample after addition of reagents should be about 2. [. . . ] · The instrument briefly notifies "done" when restores factory calibration and returns to measurement mode. 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. [. . . ]