Thermo Scientific TRACE GC Ultra, Maintenance And Troubleshooting Manual

Page: 174 / 412

Chapter 9
Maintaining a PTV Injector PTV Troubleshooting
174 Maintenance and Troubleshooting Manual
Symptom Diagnosis Remedy
Discrimination in split
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.
Initial temperature too low Set
Inject temperature
to an
higher value.
Injected volume too large Reduce the amount of sample to be
injected.
Replace the liner with the 2 mm ID
version. Refer to
Clean or Replace the
Liner Operating Sequence on page 151.
Lack of an adequate quartz
wool packing inside the liner Replace the packed liner with a new one
filled will quartz wool.
Fix the quartz wool packing inside the
liner. Refer to
Adjust a Quartz Wool
Packing Operating Sequence on
page 165.
Excessive broadening
of the solvent peak.
Volatile compounds
obscured.
Lack of sensitivity Injection pressure set too high Set
Inject pressure
to a lower
value.
Sample degradation
Dirty liner Clean or replace the liner.
Refer to
Clean or Replace the Liner
Operating Sequence on page 151.
Transfer temperature set too
high Set
Transfer temp
to a value
adequate to the nature of the sample
compounds.
Table 9-3. PTV Troubleshooting Table (Continued)