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Manual abstract: user guide HANNA INSTRUMENTS HI 96734BROCHURE
Detailed instructions for use are in the User's Guide.
[. . . ] Instruction Manual
HI 96734C Free and Total Chlorine High Range ISM
www. hannainst. com
This Instrument is in Compliance with the CE Directives
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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. [. . . ] 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. · Place the instrument on a flat table. · Do not place the instrument under direct sun light.
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RANGE SELECTION
The HI 96734 can measure Free chlorine when range P1 is selected or Total chlorine when range P2 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 or P2. Code P1 P2 Parameter 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. 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. · 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. [. . . ] · 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. [. . . ]
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