Convection Board Specifications - Varian XGS-600 Instruction Manual

Item
Remote I/O
Allowable Cable Length
Convection Gauge Board
The Convection card operates two Thermocouple/Convection gauges and allows you to
calibrate:
❑
To the actual atmospheric pressure value,
❑
To vacuum pressure,
❑
and select calibration for air or argon.
Calibration is Varian's Smart Cal that determines whether a CAL command is for vacuum or
atmosphere. Remote control of calibration and analog output is standard. Each channel has
its own 9-pin Dsub connector.
E
Item
Supported Gauge Heads
Displayed Measurement Range
Gas Types
Atmosphere Value Range
Analog Output
Error Detection
Gauge Connector
A-4
XGS-600 Gauge Controller
Table A-2 HFIG Gauge Specifications
❑ Connector: 6 pin IEEE 1394
Grounding the input pin activates that function; leaving pin 1
open selects filament 1
The Status Output goes HI during an error
❑ up to 50' using Varian standard cable
❑ up to 300' using under 10' Varian standard cable + Varian exten-
sion cable
Table A-3 Convection Board Specifications
Varian Model, 536, 531, and ConvecTorr
1.0E-4 Torr to 1000 Torr
Air or Argon
500 to 1000 Torr
❑ Range: 0-10 VDC
❑ Slope: 1 V per decade log
❑ Characteristic: output voltage = Log (Pressure) + 5
❑ Output when gauge OFF or Error = 10 V
❑ Load Impedance: >10 kOhms
Open cable/sensor
Dsub9
Description
Description