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HVG-2020B Instruction Manual
Option 12: Non-Linear Analog Output (Convection Style Curve)
Pressure to Voltage Conversion
p = 0.0001 Torr
p = 1000 Torr
v = 0.375 V
v = 5.659 V
Below 7.20 Torr
v=(a+cp+ep^2+gp^3)/(1+bp+dp^2+fp^3) volts
Above 7.20 Torr
v=(a+cp+ep^2+gp^3)/(1+bp+dp^2+fp^3+hp^4) volts
Below 7.2 Torr
a
b
15.31570974
c
d
e
59.56106682
f
5.507480905
g
27.91187899
h
Voltage to Pressure Conversion
v = 0.375 V
v = 5.659 V
p = 0.0001 Torr
p = 1000 Torr
0.375 to 2.842 V
p=a+bv+cv^2+dv^3+ev^4+fv^5 Torr
2.842 to 4.945 V
p=(a+cv+ev^2)/(1+bv+dv^2+fv^3) Torr
4.945 to 5.659 V
p=(a+cv)/(1+bv+dv^2) Torr
0.375 to 2.842 V
a
b
c
d
e
f
EAR99 Technology Subject to Restrictions Contained on the Cover Page
Above 7.2 Torr
0.375
1.485409798
0.307029664
14.4180837
1.566833148
24.2920447
-0.000228563
-0.001397165
1.36167E-06
7.85644E-06
-2.23911E-11
2.842 to 4.945 V 4.945 to 5.659 V
-0.02585
0.1031
0.03767
-0.3986
0.04563
-0.02322
0.1151
0.07438
-0.04158
0.07229
0.008738
-0.006866
100.624
-0.37679
-20.5623
0.0348656
Page 13 of 40
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