Activating The Ig Sensor; Analog Output - Instrutech The Hornet IGM402 User Manual

Instruction Manual

Activating the IG sensor

5.9
Before you turn on the IG filament and activate the sensor, make sure you understand all instructions and
information provided in this user manual. You can activate the sensor by one of the following methods:
1) Front Panel (manually using front panel soft-keys (see IG CNTL and FRONT PANEL in
2) Digital Input (see IG CNTL in
3) RS485 commands (see IG CNTL in
4) CG1 CONT IG - using convection gauge 1 (CG1) to control IG (see IG CNTL in
Note - It may take up to 8 seconds for the IGM402 transducer filament to turn on after it has received a turn on
command via the front panel select key, Digital Inputs, or RS485 command control modes. The ion gauge
measurement screen may display "UNIT STATUS OFF" during the time that the IGM402 is starting the emission
and stabilizing the measurements.
6

Analog output

The IGM402 provides a total of three analog outputs. One analog output represents measurements from the
ion gauge and the other two analog outputs represent measurements from convection gauges CG1 and CG2.
The following is a list of analog output scaling choices available from the IGM402:
A) Ion gauge analog output scaling:
IG ONLY - Log-linear 0 to 9 Vdc, 1 V/decade, or
A1) Ion gauge plus convection gauge output scaling when used for full range measurements:
IG+CG1 - Log-linear 0.5 to 7 Vdc, 0.5 V/decade, and
B) Convection gauge analog output scaling:
CG1 and CG2 - Log-linear 1 to 8 Vdc, 1 V/decade, or
CG1 and CG2 - Non-linear 0.375 to 5.659 Vdc
The Analog Output voltage type described below represent the pressure displayed for nitrogen / air only. Refer
to section 7 if you are using a gas other than nitrogen/air.
InstruTech
section 5.8.2)
section 5.8.2)
IGM402 Hornet
section 5.8.2)
section 5.8.2)
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