Granville-Phillips Series 330, Instruction Manual, Page: 53 / 76

5 Convectron Gauge Module
53
Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
5.3.5 Convectron Gauge Analog Output Signal
If the Convectron gauge capability is installed, a voltage output signal proportional to the common
logarithm of the pressure indication is provided on the rear panel of the Convectron gauge module
via a standard 1/8 in. miniature phono jack or BNC connector. See Figure 5-11.
If graphed on loglinear axes, the output voltage is linear with respect to the log of pressure. The
analog output is 1 V per decade of pressure with a factory adjusted output of 0 V at 1.0 x 10
–4
Torr.
Offset adjustments are provided on the top edge of the Convectron gauge module that allow
shifting the voltage corresponding to 1 x 10
–4
Torr between –7 V and +1 V. See Figure 5-12.
Figure 5-11 Convectron Gauge Analog Output Signal Offset Adjustment Potentiometers
Figure 5-12 Convectron Gauge Pressure Analog Output