Instrutech The Hornet IGM402 User Manual page 29

Instruction Manual
- IG + CG1 LG
This mode shows the combined vacuum measurements of the ion gauge and convection gauge 1 (CG1)
on one display line, providing full range vacuum measurements of your chamber from 1.00 x 10
1,000 Torr. This combination measurement function is available only with CG1. Note - If you are using
the analog output signal and need it in the same combination mode as described for the display above,
you must also access the SETUP IG Menu, then select ANALOG MODE, then select IG + CG1 and save.
Indicates IG & CG1 used for
full range measurement
Ex 3A: IG + CG1 data displayed for full range vacuum measurements with CG1 in IG + CG1 LG mode
Note - In this mode any pressures displayed from 1.00E-9 to 1.00E-3 Torr are based on measurements from
the ion gauge. Displayed pressures higher than 1.00E-3 Torr are based on measurements from CG1.
Note - When selecting IG + CG1 LG or the IG + CG1/CG2, the analog output in the ANALOG MODE of the
SETUP IG menu must also be set to IG + CG1. This will enable the analog output to provide a log-linear 0.5 to
7 Vdc, 0.5 V/decade over the entire full range measurement. (See SET UP IG and ANALOG MODE in
Section 5.8.3)
- IG + CG1/CG2
In this mode two separate display screens appear sequentially. The first screen combines the vacuum
measurement from the ion gauge and convection gauge 1 (CG1) to provide full range vacuum
measurements from 1 x 10
measurement function is available only with CG1). This is followed by the second screen showing the
convection gauge 2 (CG2) data as shown in example Ex 1C. The screens repeat each time the
programmed display interval time has elapsed.
- IG/CG1 LG
In this mode two separate display screens appear sequentially. The first screen shows the ionization
gauge data as shown in Example Ex 1A. This is followed by the second screen showing the convection
gauge 1 (CG1) data as shown in Example Ex 1B. The screens repeat each time the programmed display
interval time has elapsed. The convection gauge 2 (CG2) data is not displayed.
- IG/CG2 LG
In this mode two separate display screens appear sequentially. The first screen shows the ionization
gauge data as shown in Example Ex 1A. This is followed by the second screen showing the convection
gauge 2 (CG2) data as shown in Example Ex 1C. The screens repeat each time the programmed display
interval time has elapsed. The convection gauge 1 (CG1) data is not displayed.
InstruTech
Negative Exponent
6.45
IG+CG TORR
N2 RLY I
Gas Symbol
-9
to atmosphere as shown in example Ex 3A. (Note - This full range
Measured Pressure
9
E
Indicates Pressure Unit
Indicates Ion Gauge
Relay I is energized
IGM402 Hornet
-9
to
Page 27