PerkinElmer CLARUS 600 GC, User Manual

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Clarus 600/680 User’s Guide
4-33
3. In the TCD Configuration screen set the
Make-up gas
and
Reference gas
line
flows to 30 mL/min using the up and down arrow buttons or the numeric
keypad.
4. As shown in the example above, use the up and down buttons or the numeric
keypad to set the filter to
200
and the Output to
5
.When all the settings are
appropriate for your analysis touch OK . The TCD screen will now show the
changes you made in the configuration settings for the TCD detector.
The default setting for the filter is 200 milliseconds. If you want to improve
the signal-to-noise, change the setting to 800 milliseconds; however, the noise
improves but the peak shapes broaden. If you want a faster detector response,
change the setting to 50 milliseconds; however, the noise level may increase.
NOTE: To protect the TCD filaments from errors associated with the sample and reference
gas channels, you must select the necessary detector gas sources. As shipped from
the factory, the sample channel is Carrier 2 and the reference gas channel is the
detector Reference Gas. In some cases, with Arnel configurations, for example, the
TCD could be sourced with both a Carrier gas as well as an Aux gas (in GSV
applications half the run could look at the Carrier and half could look at an Aux
source). In other cases, the reference gas could be replaced by a second channel of
carrier gas (in a dual column TCD setup).
Enter the TCD Bridge Current Range

Select a bridge current range using the criteria in the following table.
NOTE: Operating at too high a temperature can have an adverse effect on filament life.
Table 4-1. Bridge Current Range vs. Max. Detector Operating Temperature
Bridge Current Range Recommended Operating Temperatures
for the Following Detectors
He or H
2
N
2
Argon
± 4 Up to 100 ° C
Do not Use 4 Do not Use 4
± 3 Up to 300 ° C
Do not Use 3 Do not Use 3
± 2 Up to 350 ° C Up to 110 ° C
Do not Use 2
± 1 Up to 350 ° C Up to 350 ° C Up to 350 ° C