10
OPERA
TIONAL GUIDE
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
soiled, 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.
The LCD displays the pH value (automatically compensated
for temperature) on the primary LCD, while the secondary
LCD displays the sample temperature. If measurements are
taken in different samples successively, rinse the probe tip
thoroughly in distilled or deionized water to eliminate cross‑
contamination.
Press any button to resume active measurements.
ENTERING CALIBRATION MODE
Press and hold the button until ”
POWER
” and
tag
is replaced by “
STD
“ and
tag. Release the button.
ENTERING SETUP MODE
Press and hold button until “
STD
“ and
tag
is replaced by “
SETUP
“ and
tag.
Release the button.
TURNING THE METER OFF
While in measurement mode, press the button.
”
POWER
” and
tag will appear.
Release the button.
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