22
• Alternatively, wait for one minute and just press
READ /TIMER.
In both cases, the lamp,
cuvette and detector icons will appear on the display, depending on the measurement phase.
• At the end of measurement, the instrument directly displays concentration in mg/L of free
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 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.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake the sample for approximately
2 minutes after adding the reagent.
MEASUREMENT PROCEDURE