Fault Diagnosis - Elcometer SCM400 Operating Instructions Manual

6 FAULT DIAGNOSIS

There are no User serviceable parts inside this instrument and the back plate
should not be removed. If faults of this nature are suspected, please contact
Elcometer or your local Elcometer supplier.
Faults that may occur which can be corrected by the User are detailed in the
Table below.
Fault
Erratic salt level
readings
'Replace Battery'
message
Salt level readings
are indicated when
no sampling paper
is on the electrode
Pressure plate
becomes detached
Salt level readings
are higher than
expected
Electrodes are
heavily discoloured
Cause
Battery level too low
Battery level too low
Water may be underneath the
electrode
Support pads have lost their
adhesion
Contaminated pressure plate or
electrode
Water conductivity is too high
-1
(i.e. >0.25 µS.cm )
Sample papers are
contaminated
Oxidation/corrosion due to salt
solutions
Remedy
Replace battery.
See Section 5.7
Replace battery.
See Section 5.7
Remove and dry electrode.
See Section 5.4
Replace support pads.
See Section 5.6
Clean the surface of the
electrode and pressure plate.
See Section 5.4
Check the quality of the water.
See Section 5.2
Check the sample papers.
See Section 5.3
Thoroughly clean the
electrode.
See Section 5.4
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