Chapter 15 Maintenance and troubleshooting
15.2 Troubleshooting
F-52, 53, 54, 55 209
● When there is a problem with the main unit of the pH meter;
When there is a problem in the sample;
● The response is slow
Cause How to solve problem
There is a motor or
other device causing
electrical interfer
-
ence.
Measure at a place where no influence from
induction is given.
Ground all AC-powered equipment
The electrode is not
connected correctly.
Connect the electrode correctly.
Cause How to solve problem
The liquid junction is
not immersed in the
sample solution.
Immerse the electrode in the sample solution
up until the liquid junction.
This is caused by the
effects of the sam
-
ple.
Judge by measuring with a stable standard
solution.
Cause How to solve problem
This is caused by the
effects of the sam
-
ple.
Response time may slow down, depending on
the properties of the sample solution.
Wash the respon-
sive membrane.
Wash the responsive membrane.
The responsive
membrane is dam
-
aged or worn out.
Replace the electrode.
There is a problem
with the standard
solution.
Fill the electrode with new standard solution,
as noted in the electrode
operation manual.
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