TMA Q Series Getting Started Guide
27
Port Function
Base Purge This port is not used with the TMA.
Gas 1 Gas inlet port controlled by the Mass Flow Controller. Used for the sample purge
gas.
Gas 2 This port is not used with the TMA.
Cooling Gas Provides the furnace with air for cooling (830 kPa gauge [120 psig] maximum
pressure).
Purge Line
You can control the sample atmosphere during experiments by connecting a purge gas to the system. The TMA
is equipped with a mass flow controller (MFC) to control the flow rate of the gas. Follow these instructions to
connect the purge line. Refer to the figure below to locate the purge lines.
CAUTION: Do not use any liquid in the purge lines. Use of corrosive gases will shorten
the life of the instrument.
WARNING: Use of an explosive gas as a purge gas is dangerous and is not recom-
mended for the TMA instrument. See Chapter 1 for a list of recommended purge
gases.
1. Locate the Gas 1 port; this port is used to purge the sample area.
2. Connect the primary gas line to the Gas 1 port using 1/8-inch O.D.
tubing. Teflon® TFE tubing is recommended and is supplied in the
instrument shipping accessory kit. The flow rate is controlled
through the Mass Flow Controller settings chosen using the
instrument control software.
Ports on the Back of the TMA Q400
Gas 1
Cooling Gas
Gas 1
Port Not Used
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