User manual HANNA INSTRUMENTS HI 96729C

[. . . ] Instruction Manual HI 96729C Fluoride Low Range ISM www. hannainst. com This Instrument is in Compliance with the CE Directives 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. This instrument is in compliance with directives. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] a) on zero reading Light High: There is too much light to perform a measurement. Please check the preparation of the zero cuvet. Light Low: There is not enough light to perform a measurement. Please check the preparation of the zero cuvet. No Light:The instrument cannot adjust the light level. Please check that the samples does not contain any debris. b) on sample reading Inverted cuvets: The sample and the zero cuvet are inverted. Zero: A zero reading was not taken. Follow the instructions of the measurement procedure for zeroing the meter. 9 Under range: A blinking "0. 00" indicates that the sample absorbs less light than the zero reference. Wipe it thoroughly with HI 731318 or a lint-free cloth prior to insertion. · Shaking the cuvet can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvet. · 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 cuvet 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. STARTUP Prepare the instrument for measurement as follows: · Unpack the instrument by removing the dust protection sleeve from the instrument cuvet holder. · Place the battery in the instrument as described in the "BATTERY REPLACEMENT" chapter. 12 MEASUREMENT PROCEDURE To compensate the meter for the sample turbidity or color, the measurement takes place in two phases. · 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. For most accurate results, use of a class A laboratory pipette is strongly recommended. · Add 2 mL of HI 93729-0 Fluoride Reagent to the cuvet by use of the 2000 L automatic pipette. For a correct use of the automatic pipette, please follow the related Instruction Sheet. · Replace the cap to the cuvet, and shake gently a couple of times. blank · Place the cuvet with the reacted deionized water (blank) into the cuvet holder and ensure that the notch on the cap is positioned securely into the groove. [. . . ] · Press GLP/ to enter GLP mode. 20 · Press READ/ /TIMER to enter in the factory calibration restore screen. The instrument asks for confirmation of user calibration delete. · Press ZERO/CFM to restore the factory calibration or press GLP/ again to abort factory calibration restore. · 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. [. . . ]