Agilent Technologies 7890A - FID Ignitor Does Not Glow During Injection Sequence

72 Troubleshooting
4 GC Not Ready Symptoms
FID Ignitor Does Not Glow During Injection Sequence
1 Remove the detector top cover.
2 Turn the FID flame On.
3 Observe the ignitor plug though the FID chimney. The
small hole should glow during ignition sequence.
If the test fails, check for the following possible causes:
• The ignitor may be bad; replace the ignitor.
• Detector temperature is set to < 150 °C. Agilent
recommends operating the FID at >
300 °C.
• The ignitor is not making a good connection to the
ground:
• The ignitor must be tightly screwed into the FID castle
assembly.
• The three T- 20 Torx screws that hold the collector
assembly in place must be tight.
• The brass knurled nut that holds the FID castle
assembly in place must be tight.
Perform FID maintenance if these parts are corroded or
oxidized.
WARNING
Keep body parts at a safe distance from the FID chimney while
performing this task. If using hydrogen, the FID flame will not be
visible.
T-20 Torx screws (3)
Ignitor
Knurled nut