Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 425)

<7. Troubleshooting>
7-12
IM 11B08A01-01E
7.2.3 Malfunctioning Chromatogram
It is available to use three types of detector such as TCD, FID and FPD. Troubleshooting diagram
for malfunctioning chromatogram is different according to the shown as followings.
(1) TCD
Troubleshooting diagram for malfunctioning chromatogram is shown as followings.
F0304.ai
Malfunctioning chromatogram
Bridge balance
of detector is good
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
No
Yes
No
Yes
No
Turn on detector DET CURRENT
ERROR is occured
Status of
detector is ON
Replace detector
Wiring for
detector is good
Replace wiring for detector
Replace detector board
Adjust current with volume
on detector board
Current value
is as specified in operation
data
Current can be adjusted
End
Baseline of
detector is malfunctioning
Column system failure or
sampling system failure
Temperature
of oven is stable
Wait for stabilization of
oven temperature
External piping is clean Use clean piping
Bridge
balance of detector is
good
Repalce detector
Insulation
resistance of detector is
good
Replace wiring for detector Wiring for detector is
good
Replace detector board
Figure 7.4 Troubleshooting Diagram for Malfunctioning Chromatogram (TCD)
2nd Edition : May 11, 2012-00