14
• When the beeper sounds briefly and the
LCD displays dashes, the meter is ready.
The blinking “ZERO” indicates that the
instrument needs to be zeroed first.
Note: Pay attention that the selected range
is the one desired to run measurements.
If not, change the range following the
instructions from Range Selection.
pH MEASUREMENT
• Fill the cuvette with 10 mL of unreacted
sample, up to the mark, and replace the
cap.
• Place the cuvette into the cuvette holder
and ensure 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 and add 5 drops of
the HI 93710-0 Phenol Red Indicator.
Replace the cap and shake gently the
solution.
• Replace the cuvette into the cuvette holder
and ensure that the notch on the cap is
positioned securely into the groove.
• Press READ/
/TIMER. The lamp, cuvette
and detector icons will appear on the
display, depending on the measurement
phase.
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