29
METHOD PROCEDURE
• Remove the cuvette.
• Add 1 packet of HI93711-0 Total Chlorine
Reagent. Replace the plastic stopper and the cap.
Shake gently for 20 seconds.
• Insert the cuvette into the holder and ensure that
the notch on the cap is positioned securely in the
groove.
• Press Read. The display will show a 2 minute 30 second countdown prior to the
measurement. To skip the timer, press Read twice. When the timer ends, the
meter will perform the reading. The instrument displays the results in mg/L of
chlorine (Cl
2
).
INTERFERENCES
Interference may be caused by:
• Bromine, Iodine, Oxidized forms of Chromium and Manganese, Ozone
• Hardness greater than 500 mg/L CaCO
3
, to remove the interference shake the
sample for approximately 2 minutes after adding the powder reagent
• Alkalinity greater than 250 mg/L CaCO
3
or acidity greater than 150 mg/L CaCO
3
,
the color of the sample may develop only partially or may rapidly fade, to remove
the interference neutralize the sample with diluted HCl or NaOH
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