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For food pH measurement (e.g. sushi, cheese, meat, fruit, etc.), it should always be a sampling
test. That means test samples should no longer be edible.
How to take pH measurements
Short press
to turn on the tester. Rinse the probe in distilled water, shake off excess water. Insert
the probe in your sample solution, make a quick stir and hold still. Record the reading when it is
stabilized (
appears and stays on screen).
Pure Water pH Measurement
When testing pure water like tap water, drinking water, RO water and distilled water, it will take longer
for the readings to get fully stabilized (typically 1-5 minutes). Please be patient. If still not working, add
Apera 3M KCL (AI1107) to your pure water at the ratio of 1:1000 (e.g. 1 ml KCL to 1000 ml water) to
accelerate stabilization while minimizing pH change. If the accuracy is not meeting your requirement,
please contact us at [email protected] to find the specialized meter designed for pure water pH test.
8. ORP Measurement
1)
ORP stands for Oxidation-Reduction Potential, measured in mV. It’s also called redox. ORP
is a
measure of the cleanliness of water & its ability to break down contaminants. A separate ORP
probe (ORP60-DA) needs to be installed to be able to measure ORP.
2)
Power on the PC60-Z tester, unscrew the original probe, and install the ORP60-DA probe, then
the tester will automatically switch to ORP measurement mode (Refer to Section 14 for how to
replace a probe).
3)
Rinse the probe in distilled water and dry it. Dip the probe in sample solution, shake for a few
seconds, and allow it to stand still. Get the ORP readings after
appears and stays on screen.
9. Probe Cleaning
1)
The tester is only as accurate as the probe is clean. Always thoroughly rinse off the probe before
and after each measurement with pure water in a container or with a wash bottle.
2)
For tough contaminants, detach the sensor shield, soak the probe in Apera probe cleaning
solution (AI1166) or detergent water for 30 minutes. Then use a soft brush to remove the
contaminants. Afterwards, soak the probe in 3M KCL soaking solution for at least 1 hour. Rinse it
off, then re-calibrate the tester before using again.
10. Probe Storage
1) Always store the spear probe in the 3M KCL soaking solution when not in use. Never let it dry
out. Replace the soaking solution if it gets contaminated.
2) NEVER store the probe in pure water like tap, RO, distilled, or deionized water as they could
damage the pH probe. If this happens, immediately soak the pH probe Apera 3M KCL soaking
solution overnight, then re-calibrate it before using. Pure water is only for rinsing the probe.
