46
tinb21e1 (2016-06)
7 Analog
Output
The PGE500 provides either a non-linear or two different log-
linear analog outputs. Additionally a linear 0-10 V (dc) analog
output is provided.
Non-Linear Output
The first Convectron
®
gauge controllers produced a non-linear
output signal of 0.375 to 5.659 V (dc) for 0 to 1000 Torr of N
2
,
roughly in the shape of an "S" curve, as shown as follows.
Granville-Phillips
®
adopted the same output curve for most of
their Mini-Convectron
®
modules and controllers with non-linear
output (although in recent years, some Granville-Phillips
®
con-
trollers may output variations of the original S-curve).
The non-linear output from INFICON convection gauges, mod-
ules and controllers duplicates the original S-curve of 0.375 to
5.659 V (dc) for 0 to 1000 Torr.
The tables shown in section 7.1 and 7.2 contain the lookup data
for converting the
non-linear
output voltage into pressure values
for nitrogen and various other gases.
Non-Linear Analog Output
10
+3
10
-3
10
-2
10
-1
10
0
10
+1
10
+2
1
2
3
4
5
6
Pressure - Torr
Output - Volts
Non-Linear Analog Output
10
+3
10
-3
10
-2
10
-1
10
0
10
+1
10
+2
1
2
3
4
5
6
Pressure - Torr
Output - Volts
10
+3
10
-3
10
-2
10
-1
10
0
10
+1
10
+2
1
2
3
4
5
6
Pressure - Torr
Output - Volts
Содержание PGE500
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