Emerson Rosemount 700XA Reference Manual page 186

Troubleshooting
June 2022
6.1.11 GC Idle
Potential cause
Someone has placed the gas chromatograph (GC) in Idle mode. The GC is not running an
analysis.
6.1.12 Heater (1-8) Out of Range
The gas chromatograph (GC) has failed to regulate heater zone temperatures for the
indicated heater to within preset limits.
Recommended actions
6.1.13 Flame Out
Detector 1 Flame Out
The flame ionization detector (FID) or flame photometric detector (FPD) will not light or
has extinguished.
Potential cause
The FID is out.
Recommended actions
To ignite the flame manually:
186
1. Check temperatures within the GC, using Rosemount MON2020 or the local
operator interface (LOI).
Be aware that the GC may generate this alarm following start-up or if the set
point has been changed.
2. Check wiring, looking for splits or loose connections at the termination board
(for both the heaters and the RTDs.
3. If necessary, replace the defective heater and/or RTD.
1. Use the front switch panel or Rosemount MON2020 to ignite the flame.
2. If unable to sustain the flame, confirm that both fuel and air cylinders are
connected and contain sufficient pressure.
3. Confirm that the fuel and set points are set to achieve the factory-desired
mixture.
4. Confirm that there is no blockage at the FID exhaust outlet, such as a cap or ice.
5. Check that the wiring connections are secure for the FID, both on the FID cap
and at the termination board.
6. If necessary, replace the FID module.
1. Connect the air to the inlet and slowly bring the pressure to 60 psig (4.1 barg).
2. Connect hydrogen to the inlet and slowly bring the inlet pressure to 60 psig
(4.1 barg).
Reference Manual
2-3-9000-744
Emerson.com/Rosemount