Troubleshooting The Ptv Injector - Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual

Chapter 9
Maintaining a PTV Injector

Troubleshooting the PTV Injector

Symptom
Discrimination of
heavy compounds in
splitless mode
172
Table 9-3. PTV Troubleshooting Table
Diagnosis
Transfer temperature too low
Transfer time too low
Splitless time too short
Initial temperature too high
with regard to the solvent
boiling point
Flooding of the liner due to
low injection temperature
Flooding of the liner due to
injected volume too large
Flooding of the liner due to
insufficient size
Dirty liner
Remedy
Set Transfer temp to a higher
value.
Set transfer time or cleaning
time to a value close to the whole GC
run time.
Set Splitless time to a higher
value.
Set Inject temp to a value closer to
the solvent boiling point.
Set Inject temp to a higher value. If
the symptom does not disappear, insert
quartz wool in the liner. Refer to
a Quartz Wool Packing
Sequence on page 165.
Reduce the amount of sample to be
injected.
Replace the liner with one of adequate
diameter. Refer to Clean or Replace the
Liner Operating Sequence on page 151.
Replace the liner with one of larger
diameter. Refer to Clean or Replace the
Liner Operating Sequence on page 151.
Clean or replace the liner. Refer to
Clean or Replace the Liner
Sequence on page 151.
Maintenance and Troubleshooting Manual
PTV Troubleshooting
Adjust
Operating
Operating