Inficon VGC083A - 7.8 CG1;CG2 0-7 V Analog Output

58 tinb29e1-c (2019-10) VGC083A_B.om
When the analog output is setup, as described in section 6.5.6, for CG1 0 – 7 V or
CG2 0 – 7 V, the analog output voltage represents the pressure measured by CG1
or CG2 for nitrogen/air only. Refer to section 8.3.3.2 if you are using a gas other
than nitrogen/air.
Analog output: Convection Gauge Log-linear 0 to 7 V (dc), 1 V per decade
A) The log-linear output signal and pressure are related by the following formulas
when units of measurement is in Torr and mbar:
P = 10
(volts - 4)
V = log
10
(P) + 4
Where P is the pressure in Torr or mbar, and V is the output signal in volts.
The output voltage is 0 V when pressure is at 1.00E-04 Torr.
The output voltage is 7 V when pressure is at 1.00E+03 Torr.
B) The log-linear output signal and pressure are related by the following formulas
when units of measurement is in pascals:
P = 10
(volts - 2)
V = log
10
(P) + 2
Where P is the pressure in pascals, and V is the output signal in volts.
Notes: An analog output of above +11 volts indicates a faulty convection
gauge or unplugged gauge cable.
Pressure
[Torr]
Voltage
[V]
Pressure
[Torr]
Voltage
[V]
Pressure
[Torr]
Voltage
[V]
1.00E-04
0.000
2.00E-01
3.300
3.00E+02
6.480
2.00E-04
0.301
5.00E-01
3.700
4.00E+02
6.600
5.00E-04
0.699
1.00E+00
4.000
5.00E+02
6.700
1.00E-03
1.000
2.00E+00
4.300
6.00E+02
6.780
2.00E-03
1.300
5.00E+00
4.700
7.00E+02
6.850
5.00E-03
1.700
1.00E+01
5.000
7.60E+02
6.880
1.00E-02
2.000
2.00E+01
5.300
8.00E+02
6.900
2.00E-02
2.300
5.00E+01
5.700
9.00E+02
6.950
5.00E-02
2.700
1.00E+02
6.000
1.00E+03
7.000
1.00E-01
3.000
2.00E+02
6.300
The following chart shows the graphical results of table and formulas above for
measurements in Torr.
7.8 Analog Output for CG1
or CG2 0 - 7 V (Nitrogen
/ Air only)