5.8.4.2 Setup Cg2; Analog Output - Instrutech The Hornet IGM402 User Manual

Instruction Manual
- ANALOG TYPE
This sets the analog output proportional to pressure measured from convection vacuum gauge CG1. Select
analog output type as LOG-LINEAR or NON-LINEAR (S-Curve) for CG1:
LOG-LINEAR selection will provide a Log-Linear analog output: 1-8 Vdc, 1 V/decade
NON-LINEAR selection will provide a Non-Linear analog output: 0.375 to 5.659 Vdc

5.8.4.2 SETUP CG2

Pressing the ENTER key will display the following three settings for CG2:

SET VAC – Adjustment is the same as SETUP CG1 above, except using CG2.

SET ATM –Adjustment is the same as SETUP CG1 above, except using CG2.

ANALOG TYPE – Adjustment is the same as SETUP CG1 above, except using CG2.
Note - See NOTICE above, at
atmosphere adjustment when using either mbar or pascal engineering units of pressure.

ANALOG OUTPUT

5.8.5
- IG ANALOG CAL [Factory default = Factory Set]
This has been pre-set in the factory and is used to optimize the IG analog output calibration. It is
recommended that the user not make this adjustment unless the displayed pressure on the Hornet and the
resulting pressure recorded from the analog output do not match closely.
To perform the analog output calibration, connect the IG analog output to a high resolution voltmeter, your
system, PLC, etc. Evacuate your vacuum system to a low enough pressure for the IG to operate. Establish a
system pressure so that the displayed IG reading is preferably at the high end of any decade (for example
9.00E-05 as opposed to 1.00E-05). Press the ENTER key when in the IG ANALOG CAL menu to see the next
screen which allows you to calibrate the analog output. Use the UP or DOWN keys to adjust the analog
output to match the corresponding displayed pressure.
Example: After pressing the ENTER key in the IG ANALOG CAL menu the next screen (analog output
calibration screen) is displaying a pressure of 9.00E-05 Torr. Based on the equation and table given in
section 6.1 the expected analog output at 9.00E-05 Torr is 5.9542 V. Use the UP or DOWN keys to set the
analog output to 5.9542 V as recorded by your voltmeter. Alternatively, if the IG analog output is used to
display the IG pressure on your PLC or system display console, simply use the UP or DOWN keys so that the
IG pressure displayed by your PLC (pressure established at the high end of any decade preferred) matches
the IG pressure displayed in the analog output calibration screen. When done press the ENTER key to save
the settings. Note - As you adjust the analog output, the number you are changing in the analog output
calibration screen represents the millivolts offset from zero volts that is being used internally for the analog
output gain adjustment.
InstruTech
Section 5.8.4.1, when operating in units of mbar or Pa. You must first set the
IGM402 Hornet
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