Teledyne GC-Pro/FID - Gas Chromatograph - Manual (Page 53)

GC-Pro FID Operation
Teledyne Analytical Instruments 39
4.6.1 Verification of the Flame Guard Circuit
Prior to using the analyzer for the first time, the operation of the
flame guard circuit should be checked. This circuit has been checked at
the factory, but should be re-verified during start-up. Use the following
procedure after ignition of the flame has been achieved:
1. Turn off the fuel at the supply cylinder.
2. Observe the fuel pressure gauge on the analyzer control panel. The
gauge indication will decay as the fuel in the line is exhausted.
When the gauge reading reaches near zero, the flame will
extinguish as the fuel solenoid shuts off the fuel supply. The
display will indicate an ignition failure followed by a request to re-
ignite.
3. The analyzer will automatically try to re-ignite. After 5 attempts, it
will display: flame failure, check air, fuel and the flame failure
LED will be on.
4. Open the cylinder supply valve and re-ignite the flame by
pressing the ‘OK’ button on the Re-ignite screen.