18
• At the end of measurement, the instrument directly displays concentration in mg/L of free chlorine,
total chlorine or cyanuric acid or the pH measured value and the range number on the LCD.
INTERFERENCES FOR FREE CHLORINE AND TOTAL CHLORINE
Bromine, Oxidized Manganese and Chromium, Chlorine dioxide, Ozone and Iodine (positive error).
Alkalinity above 250 mg/L CaCO
3
or acidity above 150 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
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 powder reagent.
• Alternatively, wait for:
Free Chlorine:
1 minute;
Total Chlorine:
2 minutes and 30 seconds,
Cyanuric Acid:
45
seconds,
pH:
press
READ /TIMER
directly.
Press
READ /TIMER.
In all cases the lamp cuvette and detector icons will appear on the
display, depending on the measurement phase.
or
• Press and hold
READ /TIMER
for three seconds. The display will show the countdown prior
to measurement. The beeper is playing a beep at the end of the countdown period.
MEASUREMENT PROCEDURE
or
1'
2'30"
3"