M
AINTENANCE
Thermal Conductivity Detector
CP-3800 GC Getting Started Manual
73
2 Monitor the output signal while the detector heats to its
maximum temperature. The signal will increase initially, then
gradually decrease as chemical contaminants vaporize from
the detector surfaces.
3 Allow the
DETECTOR TEMP
to remain at 400
°
C until the signal
reaches a stable level. A stable signal indicates that the foil has
been cleaned as much as it can be by this method.
4 Set the detector at normal operating temperatures and flow
carrier gas through the detector overnight. Check and readjust
the Contact Potential setting if necessary.
5 If the performance of the detector is not restored by these
cleaning methods, refer to the Radiation Safety Manual
(P/N 03-913999-00) for information on replacement of the foil.
Thermal Conductivity Detector
The Thermal Conductivity Detector is not user serviceable and has no
replacement parts. To condition the TCD, set the detector temperature to
350
°
C and allow it condition for 4 hours or overnight. The filament
temperature should be set to zero during this procedure.
Pulsed Flame Photometric Detector
For PFPD maintenance procedures see the PFPD Operator’s Manual,
P/N 03-914649-00.
Micro Thermal Conductivity Detector
The Micro-TCD is not user serviceable and has no replacement parts.
