Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual page 216

Chapter 11
Maintaining a FID
After the flame appears to have ignited, check for water vapor condensed on a
mirror or on the polished end of a wrench directly over the FID exit. You should
observe steam condensing on the cold surface. If not, the flame is not ignited.
WARNING! Do not lean over the FID to see the flame, it is invisible.
Table 11-5 reports the possible causes of flame ignition problems and the relevant
remedies.
216
Cause
Incorrect fuel gas
flows
Defective igniter
Broken or
cracked flame
jet
Blocked jet tip
Faulty electronics
.
Table 11-5. Difficulty in igniting the flame
Remedy
Make sure that all flows are correct.
Check the igniter element. Refer to the
Ignition Assembly Operating Sequence on page 211 for
instructions.
Replace jet. Refer to the
Sequence on page 199 for instructions.
Check for a blocked jet by measuring the hydrogen flow
with the Thermo Scientific GFM Pro Flowmeter (or
equivalent).
If required, remove and clean the jet following the
the Jet Operating Sequence on page 195.
Contact your customer support organization.
Appendix B, Customer
information for Thermo Fisher Scientific offices and
affiliates worldwide.
FID Troubleshooting
Replace the
Replace the Jet Operating
Communication, contains contact
Maintenance and Troubleshooting Manual
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