66
Doc. Ref. XGC-320-100119
V100 (2019-11)
Note - when using the units of pascals and LOG 0-7 is selected,
the same equation of P = 10
(V - 4)
listed above applies. This re-
sults in a log-linear analog output range of about 2.00 V (dc) at
.01 pascals (Pa) and 9.12 V (dc) at 133 kPa.
Chart of the calculated pressures using the formulas and data for
the log-linear output signal for nitrogen from the previous page.
7.5
NONLIN 6V; Non-Linear Analog Output
Equations
You may calculate the N2/air pressure represented by the
0.375
to 5.659 V
non-linear analog output voltage for the "S-curve"
using a multi-segment, n
th
order polynomial function calculation.
The coefficients for the n
th
order polynomial equation defined for
various pressure measurement ranges are given in the following
table: