10
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.
The LCD displays the pH value (automatically compensated
for temperature) on the primary LCD, the EC, TDS or pH‑mV
value on the secondary LCD, while the third LCD line displays
the sample temperature.
If measurements are taken in different
samples successively rinse the probe
tip thoroughly
†
to eliminate cross‑
contamination. For better accuracy,
frequent calibration of the pH sensor with the meter is
recommended. In addition, the meter must be recalibrated
whenever:
a) The pH electrode is replaced.
b) After testing aggressive chemicals.
c) Where high accuracy is required.
d) At least once a month.
e) After cleaning the probe.
†
The probe tip should be rinsed with purified water (reverse osmosis,
distilled, or deionized) before and after placing in any solution
(buffer, storage, or sample).
Follow directions for single and two‑point calibration below:
SECOND LINE MEASUREMENT
While in measurement mode, press the
SET
button to
scroll between EC, TDS or mV of pH measurement on the
secondary LCD.
EC MEASUREMENT
Rinse the probe tip off with lots of clean water to remove
storage solution, buffers or samples. Shake off any drop
lets that remained. Place the probe in the sample to be
tested. Use plastic beakers or containers to minimize any
electromagnetic interference. Tap the probe lightly on the
bottom of the container to remove air bubbles that may be
trapped inside the tip.
OPERA
TIONAL GUIDE