YOKOGAWA RC400G, User Manual

Page: 120 / 141

<9. Troubleshooting>
9-5
IM 12F4A1-01E
End
Start
Is
sample temperature
display
normal?
Is the
temperature
sensor resistance
normal?
Is wiring correct?
Defective temperature sensor in
the counter electrode is the cause
of failure. Replace the electrode.
NO
NO
NO
YES
YES
YES
F9.3.ai
Confirm sample
temperature display with
function code “2” in
<MEAS.>.
Disconnect the terminals
T1 and T2 of the
converter, and measure
resistance of the wiring.
(Temperature sensor is
Pt 1000, conforming to
DIN Standard Class B.)
Check wiring connection
to the counter electrode,
etc.
Other failures should be considered (the
indicator electrode failure, etc.).
Failure in temperature input circuit of the
converter, etc. is the cause of failure. If
defective, the circuit board assembly must be
replaced.
Repair defective part such as loose terminal
connection.
Confirmation Method Disposition
Figure 9.3 Inspection Flow Chart for Concentration Failure
If cause(s) of the failure is(are) known, repair defective parts and reset <failure> display.
14th Edition : Jul. 15, 2020