AC Infinity AC-PHM3, Руководство пользователя

Страница: 37 / 44

37
Cannot
Calibrate
Reading is always
slowly changing,
won't stabilize
Reading keeps
jumping
Calibration is
successful, but
reading is not
accurate
ISSUE
Displays similar
readings in any
solution or always
displays 7.0 pH
TROUBLESHOOTING GUIDE
REASON
Poor quality standard solutions
Contaminated sensor
Incorrect calibration order
Dried-out probe
Broken probe
Probe is not properly connected
or the pin connector is broken.
Comparison with other testers,
test strips, or drop tests
Air bubbles around the sensor
Clogged junction
Testing pH of low iconic
strength solutions like tap/
drinking/RO/distilled water
Probe is not fully
submerged solution
Aged probe
Contaminated sensor
Aged probe
Probe is not fully
submerged solution
Air bubbles around the sensor
Aged probe
Air bubbles around the sensor
Clogged junction
HOW TO FIX
Replace with clean standard calibration solutions
made by reputable manufacturers.
Use a soft brush to clean the probe with
probe cleaning solution or detergent water.
Power on your pH meter, calibrate pH 7 first,
then pH 4. After pH 4, if you want to calibrate
pH 7 again, reboot your pH meter.
Soak the probe in the 3M KCL soaking
solution for at least 15 minutes.
If you don't see any damage to the probe,
contact AC Infinity customer support. If there is
visible damage, replace your pH meter.
Check the probe's connector, make sure it's connected and
not broken. Align the probe correctly before plugging in. Do
not force it. Ensure that the connector is not exposed.
To compare with other pH meters, make sure to calibrate all
testers in the same pH 7 solution, then test pH 4. Test strips
or drop tests' accuracy is not comparable to pH meters.
Stir in the solution to remove bubbles.
Use a soft brush to clean the probe with
cleaning solution or detergent water, then soak
it in 3M KCL soaking solution overnight.
Wait 1-5 minutes to reach a fully stabilized
reading. if still not stabilizing, then soak in
3M KCL soaking solution overnight.
Make sure the probe is fully immersed
at least 1 in. deep into the solution.
Replace the probe.
Use a soft brush to clean the probe with
probe cleaning solution or detergent water.
Replace the probe.
Make sure the probe is fully immersed
at least 1 in. deep into the solution.
Stir in the solution to remove bubbles.
Replace the probe.
Stir in the solution to remove bubbles.
Use a soft brush to clean the probe with
cleaning solution or detergent water, then soak
it in 3M KCL soaking solution overnight.