1 4
• Remove the cuvet.
• Add the content of one packet of
HI 95761-0
Total Chlorine Low Range
reagent. Replace the cap and shake gently
for 20 seconds.
• Replace the cuvet into the cuvet 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. The
beeper is playing a beep at the end of
countdown period.
Alternatively, wait for 2 minutes and 30
seconds and just press
READ/ /TIMER
.
In both cases, the lamp, cuvet 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
copper on the LCD.
INTERFERENCES
• Alkalinity:
above 1,000 mg/L CaCO
3
if present as bicarbonate
(HCO
3
sample pH
<
8.3); above 25 mg/L CaCO
3
if present as carbonate (CO
3
2-
, sample pH > 9.0).
In both cases, it will not reliably developed the
full amount of color or it may rapidly fade (negative
.