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Verifying the installation
6. Adjust the transfer line flow rate.
The TGA-IR Module is intended for use at ambient pressure,
with low pressure (5 psi or less) carrier gases flowing at a rate of
150 ml/minute or less. For information about adjusting the
transfer line flow rates, refer to the manufacturer's
documentation that came with your furnace.
After you have connected the purge, transfer, and exhaust gas lines,
you should verify that the installation of your TGA-IR Module was
successful. To do so, choose Experiment Setup from the Collect
menu in OMNIC™, and click the Bench tab in the Experiment Setup
dialog box. Set the Gain parameter to 2, and if you have a TGS
detector, you must set the Velocity parameter to .6329.
Once the parameters are set, look at the interferogram shown in the
live display. The voltage of at least one of the peaks (positive or
negative) should be greater than 5 volts as shown below. If neither
peak is greater than 5 volts, contact Technical Support for assistance.
TGA-IR Module User's Guide
15
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