Hanna-instruments HI 96104 Manual de usuario Pagina 17

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After a few seconds, the display will
show “-0.0-”. The meter is now zeroed
and ready for measurement.
Remove the cuvette and add one packet
of HI 93711-0 reagent. Replace the cap
and shake gently for 20 seconds (or
2 minutes in case of seawater analysis).
Replace the cuvette into the cuvette holder
and ensure that the notch on the cap is
positioned securely into the groove.
Press and hold READ/ /TIMER for
three seconds. The display will show
the countdown prior to measurement. An
audible “beep” indicates the end of the
countdown period.
Alternatively, wait for 2 minutes and 30
seconds and just press READ/ /TIMER.
In both cases, the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase.
The instrument directly displays
concentration in mg/L of total chlorine
on the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by:
Bromine, Iodine, Chlorine Dioxide, Ozone, Oxidized manganese and Chromium.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake the sample for approximately
1 minute after adding the reagent.
In case of water with alkalinity greater than 250 mg/L CaCO
3
or acidity greater than 150 mg/L
CaCO
3
, the color of the sample could disappear or develop only partially. To resolve this,
neutralize the sample with diluted HCl or NaOH.
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