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Instruction Manual
7.8
NONLIN 9V; Non-Linear Analog Output Equations & Table
You may calculate the pressure represented by the NONLIN 9V, 0 to 9 V non-linear analog output voltage for the "S-curve"
th
using a multi-segment, n
pressure using the following equation:
P = K
+ K
(454.67*V
)+ K
0
1
1
2
Where P=Pressure in Torr, V
Coefficients for voltage segment range of 0 to 1.8457 volts
Coefficients for voltage segment range of 1.8457 to 3.1641 volts
Coefficients for voltage segment range of 3.1641 to 4.3945 volts
Coefficients for voltage segment range of 4.3945 to 6.54785 volts
Coefficients for voltage segment range of 6.54785 to 7.3828 volts
Coefficients for voltage segment range of 7.3828 to 7.6465 volts
InstruTech, Inc.
order polynomial function calculation. Use the coefficients listed in the table below to calculate
2
(454.67*V
)
+ K
(454.67*V
1
3
= Analog output voltage
1
K
0
K
1
K
2
K
3
K
0
K
1
K
2
K
3
K
0
K
1
K
2
K
3
K
0
K
1
K
2
K
3
K0
K1
K2
K3
K
0
K
1
K
2
K
3
3
)
1
K
= +0.000000E+00
0
K
= +1.428571E-04
1
K
= +2.551020E-07
2
K
= +9.110787E-11
3
K
= -2.681040E-01
0
K
= +9.758000E-04
1
K
= -5.950000E-07
2
K
= +3.750000E-10
3
K
= +1.100000E+00
0
K
= -1.675000E-03
1
K
= +1.125000E-06
2
K
= +7.414069E-21
3
K
= -3.777930E+01
0
K
= +5.495931E-02
1
K
= -2.652588E-05
2
K
= +4.526774E-09
3
K0 = -7.184400E+03
K1 = +7.117083E+00
K2 = -2.354167E-03
K3 = +2.604167E-07
K
= -5.439800E+04
0
K
= +4.990375E+01
1
K
= -1.528125E-02
2
K
= +1.562500E-06
3
VGC301 Controller
Page 33
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