Hanna Instruments HI 96710 User Manual

Page 17

• Replace the cuvette into the cuvette holder

and ensure that the notch on the cap is
positioned securely into the groove.

•

Press and hold READ/ /TIMER

for three

seconds.

The display will show the

countdown prior to measurement. An
audible “beep” indicates the end of the
countdown period.

•

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.

• The instrument directly displays the

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 hardness greater than 500 mg/L CaCO

, shake the sample for

approximately 1 minute after adding the reagent.
In case of water with alkalinity greater than 250 mg/L CaCO

or acidity greater than 150 mg/L

CaCO

, the color of the sample could disappear or develop only partially. To resolve this,

neutralize the sample with diluted HCl or NaOH.