Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual page 313

FPD Troubleshooting
Symptom
Low sensitivity
Low sensitivity
Low sensitivity.
Water droplets generate
between the heat shields
Maintenance and Troubleshooting Manual
Table 14-5. FPD troubleshooting table (Continued)
Diagnosis
Low photomultiplier
excitation voltage
Inadequate hydrogen flow
rate
Inadequate air flow rate
Dirty interferential filter
The mirror of the combustion
chamber is dirty
The flame-side heat shield is
dirty
Reduced transparency of the
heat shields
Leak at the flame-side heat
shield
Maintaining a Flame Photometric Detector
Remedy
Set
High Voltage Mode
the FPD control table
Set the hydrogen flow rate to a proper
value. Refer to Table 14-4,
Recommended gas flow rates for FPD
on page 311
Set the air flow rate to a proper value.
Refer to Table 14-4,
gas flow rates for FPD
and relevant note
Clean the interferential filter. Refer to
Clean the Interferential Filter
Operating Sequence on page 278
Clean the mirror. Refer to
Mirror Metal Plug Operating
Sequence on page 282
Clean the flame-side heat shield.
Refer to Clean the Flame-side Heat
Shield Operating Sequence on
page 287
Replace the heat shields. Refer to
Replace the Heat Shields
Sequence on page 301
Replace the heat shields.
Refer to Replace the Heat Shields
Operating Sequence on page 301
If the symptom does not disappears,
contact your customer support
organization.
Refer to Appendix B,
Communication, for contact
information.
Chapter 14
to in
Yes
Recommended
on page 311
Clean the
Operating
Customer
313