MKS Granville-Phillips 358 series, Instruction Manual

Page: 59 / 122

Installation
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
59
Sy
stem C
o
mponents
Ini
tial
Setup
Installation
Before You
Begin
4.12 Connecting Analog
Outputs
Electrometer Module
Analog Output Signal
This voltage is proportional to the logarithm of the pressure, scaled to 1 V
per decade with 0 V at 1 x 10
–11
Torr. When the Micro-Ion gauge is turned
OFF, the output will switch to slightly over +10 V. See Figure 5-5 on
page 70.
A standard 1/8” miniature phono jack connector is supplied.
Figure 4-4 Convectron Gauge Analog Output Connector
Convectron Gauge Analog
Output Signal
If you have Convectron gauge capability installed, signal voltages
proportional to the logarithm of the Convectron gauge display indications
are provided on the back of the Convectron gauge module via a standard
1/8” miniature phono jack. See Figure 4-4. Two mating connectors are
supplied with this capability. See
Convectron Gauge Analog Output Signal
on page 82 pertaining to the characteristics of these signals.
An analog output jack is provided on the rear panel. This is a DC voltage
proportional to the logarithm of the pressure, scaled to 1 V per decade:
0 V = 1 x 10
–4
or less, Torr or mbar, 1 V = 1 x 10
–3
, etc.
For pascal units, the analog output will be scaled to 0 V = 1 x 10
–2
pascal.
Internal offset adjustments are provided that allow a shift in the analog
output at 1 x 10
–4
Torr away from 0 V to anywhere in the range –7 to +1 V.
This adjustment does not affect the slope of the analog output vs pressure
curve.