Teledyne ULTRAFLOW 150, Руководство по эксплуатации, Страница: 80 / 162

ULTRAFLOW 150 GAS FLOW AND TEMPERATURE MONITOR
runs from the second number pair (X2, Y2) to the third
Ultraflow/reference method pair of numbers (X3, Y3). If a segment is not
used, “-1” is entered for the terminal point Ultraflow value. Thus if “-1” is
entered for the last Ultraflow point only two lines are used for the curve
fit. If the second and third Ultraflow points are “-1”, only one line is
calculated. If all three points are “-1”, Look Up calculations are disabled.
Table 8-2
Ultraflow 150 Flow Polynomial Linearizer
y = -6.2362E-05x
3
- 7.0300E-03x
2
+ 1.4005E+00x -
2.9843E-12
0
5
10
15
20
25
30
35
40
45
50
0 20 40 60
Ultraflow 150 "RAW" Actual Velocity, ft/sec
Reference
Method,
Actual
Velocity,
ft/sec
The Polynomial A0 through A5 contain the coefficients of a 5th order
Polynomial least squares correction curve fit, which may be employed to
modify the velocity output of the Ultraflow 150 to more closely correlate
with the reference method testing data over differing load conditions.
Teledyne Monitor Labs must be consulted in order to properly employ this
curve because the mathematical programs used to determine these
coefficients must be evaluated subjectively for anomalies. In analyzers
not employing such correction devices A1 = 1. A0, A2, A3, A4, and A5
will be equal to zero.
8-4