42
• Remove the cuvet.
• Add 3 drops of HI 93734C reagent to the cuvet.
• Add the content of one
packet of HI 93701 DPD
reagent to the cuvet.
Replace the cap and
shake gently for 20 sec-
onds (or 2 minutes in
case of seawater analy-
sis).
• Reinsert the cuvet into the instrument.
• Press TIMER and the display will show a countdown prior to the
measurement or, alternatively, wait for 2 minutes and 30 seconds
and press READ DIRECT. The display will show “SIP” 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, Iodine, Ozone, Oxidized
forms of Chromium and Manganese.
Alkalinity above 250 mg/L or acidity above 150 mg/L will not
reliably develop the full amount of color or it may rapidly fade. To
resolve this, neutralize the sample with diluted HCl or NaOH.
In case of water with hardness greater than 1000 mg/L CaCO
3
,
shake the sample for approximately 1 minute after adding the
powder reagent.
x 3
Total Chlorine HR
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