Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 427)

<7. Troubleshooting>
7-14
IM 11B08A01-01E
(3) FPD
Troubleshooting diagram for malfunctioning chromatogram is shown as followings.
F0306.ai
Malfunctioning chromatogram
Flow rate
of combustion gas is as
specified
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
TUrn on detector DET FLAME OUT
is occured
Status of
detector is ON
Adjust flow rate of
combustion gas
Flow rate
of combustion gas is as
specified
Yes
No Level
of flame signal increase
Adjust flow rate of
combustion gas
Increase combustion air pressure
to twice value as specified
Decrease combustion air
pressure to as specified value
Re-turn on detector with
correct procedure
Voltage value
for ignition at DET board is
as specified
Repalce detector board
Yes
No Voltage value
for ignition at DET is as
specified
Replace wiring for detector
Replace detector
Baseline of
detector is malfunctioning
Column system failure or
sampling system failure
Temperature of oven is
stable
Wait for stabilization of
oven temperature
Yes
No
Combustion gas is clean
Use clean combustion air
Yes
No
External piping is clean Use clean piping
No
Replace high voltage
power supply
High voltage
value for amp. board is as
specified
Voltage value
for amp. board at DET board is
as specified
Replace detector board
Yes
No Voltage value
for amp. board at amp. board is
as specified
Replace wiring for
amp. board
Replace detector card, amp.
board or photo-multiplier
Figure 7.6 Troubleshooting Diagram for Malfunctioning Chromatogram (FPD)
2nd Edition : May 11, 2012-00