15
• 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.
• Pay attention to the selected range.
To change the range, simply press
RANGE/GLP/
.
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 swirl the solution.
• Replace the cuvette into the cuvette holder
and ensure that the notch on the cap is
positioned securely into the groove.