51
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
Chapter 6
6
Convectron Gauge Module
6.1 Introduction to the Convectron Gauge Module
The Convectron Gauge (CG) module provides pressure measurement from 1.0 x 10
-4
Torr (1.0 x
10
-4
mbar or 1.0 x 10
-2
pascal) to 990 Torr.
An analog output
proportional to the logarithm of pressure (1V per decade) is provided on the rear
of the Convectron Module. See Figure 6-2.
6.2 Units of Measure for a Convectron Gauge
The Series 340 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 Convectron Gauge:
1.
Turn OFF power to the Controller.
2.
Remove the top cover.
3.
Locate the Convectron gauge module. See Figure 4-2, Figure 6-1, and Figure 6-2.
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 Convectron
gauge module. See Section 5.2 on page 45.
7.
Replace the top cover of the controller.
Figure 6-1
Convectron Module - Top View (Controller Cover Removed)
