Thermo Scientific TRACE GC Ultra, Maintenance And Troubleshooting Manual

Page: 172 / 412

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