59
Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
Chapter 6
6
Thermocouple Gauge
Module
6.1 Introduction to the Thermocouple Gauge Module
The Thermocouple Gauge (TG) provides pressure measurement from 1.0 x 10
-3
Torr (1.0 x 10
-3
mbar or 1.0 x 10
-1
pascal) to 1 Torr.
An analog output
proportional to the logarithm of pressure (1V per decade) is provided on the rear
panel. For 20330032, the analog output is available through two BNC connectors. For 330030, the
analog output is available through two 1/8 inch miniature phone jacks.
6.1.1 Units of Measure
The Series 330 Controller is shipped from the factory preset to display the units of measure, Torr,
mbar, or pascal, that you requested. To change the units of measure for the thermocouple gauge:
1.
Turn OFF power to the Controller.
2.
Remove the top cover.
3.
Locate the thermocouple gauge module.
4.
Locate the mbar and pascal units switches. See Figure 6-1.
5.
Leave both switches “OFF” for Torr units. Turn ON the switch for either mbar or pascal units.
6.
Set the units of measure of the Electrometer module to be consistent with the thermocouple
gauge module. See Section 4.2.1 on page 33.
7.
Replace the top cover of the controller.
Figure 6-1
Thermocouple Module - Top View (Controller Cover Removed)
Summary of Contents for Series 330
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