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• After a few seconds, the display will show
“-0.0-”. The meter is now zeroed and
ready for measurement.
• Remove the cuvet from the instrument.
Remove the cap.
• Add the content of the one packet of
HI 95771A-0 Chlorine Ultra HR reagent A.
• Add the content of the one packet of
HI 95771B-0 Chlorine Ultra HR reagent
B. 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 1 minute 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
free chlorine and the range number on
the LCD.
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