Granville-Phillips Series 330, Instruction Manual, Page: 42 / 76

5 Convectron Gauge Module
42
Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
7. Do not install the gauge where it will be exposed to corrosive gases such as mercury vapor,
chlorine, or fluorine, which will attack the gold plated sensor.
8. For greatest accuracy and repeatability the gauge should be located in a stable room
temperature environment.
5.2.2 Gauge Orientation
It is important to consider the orientation of the gauge if accurate readings above 1 Torr are desired.
Below 1 Torr: The gauge will operate and accurately measure pressure below 1 Torr when mounted
in any orientation.
Above 1 Torr: The gauge will accurately measure pressures above 1 Torr only when mounted with
its axis horizontal, preferably with the port pointing vertically downward, as shown in Figure 5-3. It
is valuable to point the port downward to facilitate the removal of condensation and other
contaminants.
Furthermore, the gauge is factory calibrated with the port pointing vertically downward. Installation
of the gauge with the port in other orientations may affect the accuracy of the indicated pressure.
Mounting clearance dimensions are shown in Figure 5-3.
Figure 5-3 Convectron Gauge Mounting Configurations