Teledyne ULTRAFLOW 150, Operation Manual, Page: 79 / 162

SECTION 8.0, SYSTEM CALIBRATION AND ADJUSTMENT
Flow Correction Curve Properties:

Look Up Table (LUT):
X1
Y1
X2
Y2
X3
Y3

Polynomial (POLY):
A0
A1
A2
A3
A4
A5
Table 8-1
ULTRAFLOW 150 Flow Look Up Table Linearizer
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
X1, Y1
X2, Y2
X3, Y3
Continues
X2,Y2 &
X3,Y3
slope &
intercept
The points for the Look Up Table must be derived through reference
method testing. Each point consists of an Ulraflow 150 value (X) and an
associated reference method test value (Y). The Ultraflow value is then
derived as a straight-line approximation, using up to three line segments.
The first segment has zero as its origin and ends at the first
Ultraflow/reference method pair of numbers entered. The second segment
is a line from the first number pair (X1, Y1) to the second
Ultraflow/reference method pair of numbers (X2, Y2). The third segment
8-3