Analog Module Operation
Convectron
®
ATM Vacuum Gauge Module Instruction Manual
19
Be
for
e
You Beg
in
In
stallation
A
na
log O
per
atio
n
R
S–48
5 Op
er
ation
M
ain
te
n
a
n
ce
Table 3-4
Equations for calculating N
2
or air pressure versus analog output voltage
• To convert Torr to mbar, multiply “y” by 1.333
• To convert Torr to Pa, multiply “y” by 133.3
Segment
Output voltage
Equation where y = pressure in Torr and x = voltage
Coefficients
1
0.375 to 2.842 V
a
–0.02585
b
0.03767
c
0.04563
d
0.1151
e
–0.04158
f
0.008737
2
2.842 to 4.945 V
a
0.1031
b
–0.3986
c
–0.02322
d
0.07438
e
0.07229
f
–0.006866
3
4.94 to 5.659 V
a
100.624
b
–0.37679
c
–20.5623
d
0.0348656
y
a
bx
cx
2
dx
3
ex
4
fx
5
+
+
+
+
+
=
y
a
cx
ex
2
+
+
1
bx
dx
2
fx
3
+
+
+
--------------------------------------------
=
y
a
cx
+
1
bx
dx
2
+
+
-------------------------------
=
Summary of Contents for GRANVILLE-PHILLIPS Convectron ATM
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