Series 360, Granville-Phillips, Stabil-Ion, Ionization, Vacuum ...

4 Preparing the Stabil-Ion System for Operation
10
10 -2
1
10 -3
10 -1
10 -4
normal operation
10 -2
Pressure (Torr) (mbar)
10 -5
10 -6
10 -7
10 -1 10 -9
during degas
10 -3
10 -4
10 -5
Pressure (Pa)
10 -8
10 -6
10 -9
10 -7
10 -10
10 -8
10 -11
0 1 2 3 4 5 6 7 8 9 10
IG analog output (V)
Fig. 4.8 Ionization gauge analog output vs pressure.
11
gauge
off
Figure 4-9
Ionization Gauge Analog Output vs. Pressure.
4.6 Preparing for Convectron Gauge Operation
Convectron Gauge pressures are indicated on lines A and B of the 360 Controller display.
Using the N 2 calibration to pressurize a vacuum system above about 1 Torr
with certain other gases can cause dangerously high pressures which may
cause explosion of the system. See Section 4.6.1 on page 4-12 before
using with other gases.
Install suitable devices that will limit the pressure to the level that the vacuum system can safely
withstand. In addition, install suitable pressure relief valves or rupture disks that will release
pressure at a level considerably below that pressure which the system can safely withstand.
Suppliers of pressure relief valves and pressure relief disks are listed in the Thomas Register under
“Valves, Relief”, and “Discs, Rupture”.
Confirm that these safety devices are properly installed before installing the product. In addition,
check that (1) the proper gas cylinders are installed, (2) gas cylinder valve positions are correct on
manual systems, and (3) the automation is correct on automated systems.
Vacuum gauges with compression fittings may be forcefully ejected if the vacuum system is
pressurized.
Series 360 Stabil-Ion December, 2001
4-11