6 Convectron Gauge Module
52
Series 340 Vacuum Gauge Controller
Instruction Manual - 340005 - Rev. D
6.3 Ionization Gauge Filament Auto Turn ON
Convectron Gauge "A" can be used to turn ON the ionization gauge (IG). Auto turn-ON occurs
when the pressure in the Convectron Gauge (CG) drops below the setpoint defined by the auto
turn-ON adjustment potentiometer. The automatic OFF/ON function will execute only once per
setpoint crossing. For example, the IG can be turned OFF manually when below the setpoint, and
the auto-ON function will not turn it back ON again until the pressure in the Convectron Gauge has
risen above the setpoint and once again dropped below.
The auto turn-ON potentiometer (Figure 6-2) is marked with rough pressure calibration markings.
To set the pressure at which the IG will turn ON with falling CG pressure, and OFF with rising
pressure, simply adjust the potentiometer to the desired pressure.
Figure 6-2
Convectron Module - Front and Rear Panels
Figure 6-3
Convectron Module - 9-pin Accessory Connector
15-pin Convectron
Gauge Cable Connector
See Figure 3-8 & 4-2
Front
Rear
9-pin Accessory Connector
for Convectron Gauge A &
B Analog Output contacts
& Process Control Relay
See Figure 6-3.
Calibration Potentiometers
for Convectron Gauge "A"
Calibration Potentiometers
for Convectron Gauge "B"
Ion Gauge Filament Auto
Turn ON Potentiometer
(CGA)
Process Relay Pressure
Setting Potentiometer
(CG A or B)
Process Relay ON Indicator
