15
• The instrument directly displays the
measured pH value on the Liquid Crystal
Display.
FREE CHLORINE MEASUREMENT
• Fill the cuvette up to the mark with 10
mL of unreacted sample and replace the
cap.
• Place the cuvette into the holder and en-
sure that the notch on the cap is positioned
securely into the groove.
• Press ZERO/CFM and the lamp, cuvette
and detector icons will appear on the
display, depending on the measurement
phase.
• After a few seconds, the display will
show “-0.0-”. The meter is now zeroed
and ready for measurement.
• Remove the cuvette.
• Add the content of one packet of
HI 93701-0 reagent. Replace the cap
and shake gently for 20 seconds (or
2 minutes in case of seawater analysis).
• 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.
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