83
• Wait for a few seconds and the display will
show “-0.0-”. Now the meter is zeroed
and ready for measurement.
• Remove the cap and add the
content of one packet of HI
93718 reagent. Replace the
cap and shake gently for about
30 seconds to dissolve most of
the reagent.
• Reinsert the cuvet into the instrument.
• Press TIMER and the display will show the countdown prior to the
measurement or, 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 iodine
on the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by: Bromine, Chlorine, Ozone, Oxidized
forms of Chromium and Manganese.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake
the sample for approximately 2 minutes after adding the reagent.
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 may
develop only partially, or may rapidly fade. To resolve this, neutralize
the sample with diluted HCl or NaOH.
Iodine