HVG-2020B Instruction Manual
EAR99 Technology Subject to Restrictions Contained on the Cover Page
Page 13 of 40
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
Above 7.2 Torr
a
0.375
1.485409798
b
15.31570974
0.307029664
c
14.4180837
1.566833148
d
24.2920447
-0.000228563
e
59.56106682
-0.001397165
f
5.507480905
1.36167E-06
g
27.91187899
7.85644E-06
h
-2.23911E-11
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
2.842 to 4.945 V 4.945 to 5.659 V
a
-0.02585
0.1031
100.624
b
0.03767
-0.3986
-0.37679
c
0.04563
-0.02322
-20.5623
d
0.1151
0.07438
0.0348656
e
-0.04158
0.07229
f
0.008738
-0.006866