<9. Troubleshooting>
9-3
IM 12F4A1-01E
(4) Error code “Err22” (sensitivity failure):
Conduct inspection following the inspection flow chart shown in Figure 9.2.
Confirmation Method
Confirm that the
calibration standard
solution concentration
is in the allowable
range.
Confirm the standard
solution concentration
by re-measurement.
Disposition
Check the metering
pump inspection
flow chart in
Figure 9.1.
Confirm the presence
of reagent in the
tank.
End
Set the span again, and recalibrate the
analyzer.
Adjust or replace the pump depending on the
inspection result.
Start
Is span setpoint
correct?
Is
standard solution
concentration
accurate?
Is the
pump in normal
condition?
Is reagent
present in tank?
Polish the indicator electrode referring
to subsection 4.3.10. Clean glass beads
using the procedure described
in subsection 8.4. If not cleanable,
replace them.
Can
calibration be
performed?
Replenish reagent to the tank, and
recalibrate the analyzer.
NO
NO
NO
NO
YES
YES
YES
YES
NO
F9.2.ai
Is the
applied voltage
setup normal?
Is the voltage
being applied?
YES
YES
YES
NO
NO
Check the setpoint
using the operation
described in
subsection 5.3.2(3).
Measure the applied
voltage (between the
connecting terminals
ME and RE).
If setup is unsuitable, change it. If setting
cannot be carried out properly, further
adjustment or replacement of respective part
is necessary.
Malfunctioning of circuit, etc. is the cause of
the failure. Defective component must be
replaced.
Defective indicator electrode is the
cause of the failure. Replace the electrode.
(Note) When the determination of standard
solution concentration is carried out by
manual analysis other than
amperometric titration, change of the
reference sensitivity setup may be
necessary. Refer to subsection 7.3.
Figure 9.2
Sensitivity Failure Inspection Flow Chart
14th Edition : Jul. 15, 2020
Содержание RC400G
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