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• Wait for a few seconds and the display
will show “-0.0-”. Now the meter is
zeroed and ready for measurement.
• Remove the cuvet.
• Add the content of one packet
of HI 93711-0 Total Chlorine
Reagent. Replace the cap and
shake gently for 20 seconds
• Replace the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
• Press TIMER and the display will show the countdown prior to
measurement. Alternatively, wait for 2 minutes and 30 seconds
and press READ DIRECT. In both cases “SIP” will blink during
measurement.
• The instrument directly displays concentration in mg/L of total
chlorine on the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by: Bromine, Chlorine Dioxide, Iodine,
Ozone (all these interferences give positive errors).
Alkalinity above 250 mg/L CaCO
3
will not reliably develop the full
amount of color or it may rapidly fade. To resolve this, neutralize the
sample with diluted HCl.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake
the sample for approximately 2 minutes after adding the powder
reagent.
Total Chlorine
