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Description
3.3 Theory of Operation
FUP1010 IP67 Portable
16
Operating Instructions, 03/2012, A5E02951522-02
R
①
Velocity of Sound
②
Flow Vector
③
Pipe ID
④
WideBeam Sensors
∅° = sin
-1
(VOS / V
phase
)
Where:
VOS = Velocity of sound in liquid
V
phase
= Phase velocity of sensor
T
L
= 2 * ID / (VOS * cos ∅)
ID = Pipe inside diameter
T
L
= Transit time in liquid
V
F
= V
phase
* DT / (2 * TL)
DT = Measured Transit-Time difference
V
F
= Flow Velocity
Flow Profile Compensation
Another important consideration is that the ultrasonic flow meter has to compensate for the
flow profile to maintain calibration accuracy. Shown below is a graphic of a "fully-developed"
flow profile. Note that the fluid velocity increases toward the center (axis) of the flow stream.
①
Fluid velocity near the axis of the flow stream tends to be greater.
Summary of Contents for 7ME3510
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Page 185: ...1012TP S 8 OUTLINE DIMENSIONS REFLECT MODE DIRECT MODE 1012TP S SERIES 21614 C MOUNTING TRACK ...
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Page 188: ...21614 C INPUT OUTPUT TERMINALS 1015WP T10 8 ...
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Page 195: ...DUAL HEAD CONFIGURATION 21614 C IN LINE CONFIGURATION FLOW ...
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Page 212: ...Index FUP1010 IP67 Portable 166 Operating Instructions 03 2012 A5E02951522 02 ...
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