Hanna Instruments HI99163 Instruction Manual page 10

TO SELECT THE MEASUREMENT RANGE
While in measurement mode, press the SET button to select
pH or pH‑mV measurement on the first LCD line.
TO FREEZE THE MEASUREMENT VALUES
While in measurement mode, press and hold the SET
button until "HOLD" appears on the secondary LCD. The
"HOLD" remains for 1 second and reading of pH, mV
and temperature will be frozen on the LCD with "H" blinking.
→
Press any button to resume active measurements.
TO ENTER CALIBRATION MODE
Press and hold the button until "POWER" and tag
is replaced by "STD" and tag. Release the button.
TO ENTER SETUP MODE
Press and hold button until "STD" and tag is re‑
placed by "SETUP" and tag. Release the button.
TO TURN THE METER OFF
While in measurement mode, press the button."POWER"
and tag will appear. Release the button.
pH MEASUREMENT & CALIBRATION
Make sure the meter has been calibrated before use.
If the probe is dry, soak it in HI70300 storage solution for
30 minutes to reactivate it. If fouled, clean the electrode
by soaking in cleaning solution for 20 minutes, then rinse
the tip and soak in storage solution at least 30 minutes
before use.
Rinse the electrode off well and shake off excess droplets.
Recalibrate before using.
Submerge the probe in the sample to
be tested while stirring it gently. Wait
until the tag on the LCD disappears.
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