4
Performing Detectors Routine Maintenance
Maintaining a Thermal Conductivity Detector (TCD)
Thermo Scientific
TRACE 1300 and TRACE 1310 Hardware Manual
165
Measuring the Carrier Gas Flow Rate
While the measuring of the carrier gas flow rate through the
standard TCD detector
is
performed simply connecting the flow-meter to the vent outlet, the
TCD In-series detector
requires the use of the
column- flowmeter connector
.
To measure the TCD In-Series carrier gas flow rate
Carefully push the vent line metal tubing end into the flow meter section of the column-
flowmeter connector. See
.
Figure 149.
Column Flowmeter Connector
Connect the flowmeter to the dedicated fitting on the column-flowmeter connector, then
measure the carrier gas flow rate.
Shutting Down the TCD
To shut down the detector at the end of the analytical cycle:
1. Turn off the filaments.
2. Reduce the carrier gas flow to 50% of the normal operating flow to conserve gas supplies.
A B C
To flowmeter
Vent Line Metal Tubing
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