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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.
Содержание 7ME3510
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Страница 10: ...Table of contents FUP1010 IP67 Portable 8 Operating Instructions 03 2012 A5E02951522 02 ...
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Страница 116: ...Functions 7 11 Reflexor FUP1010 IP67 Portable 114 Operating Instructions 03 2012 A5E02951522 02 ...
Страница 144: ...Technical data 11 1 Technical Data FUP1010 IP67 Portable 142 Operating Instructions 03 2012 A5E02951522 02 ...
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Страница 185: ...1012TP S 8 OUTLINE DIMENSIONS REFLECT MODE DIRECT MODE 1012TP S SERIES 21614 C MOUNTING TRACK ...
Страница 186: ...REFLECT MODE DIRECT MODE 21614 C ...
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Страница 188: ...21614 C INPUT OUTPUT TERMINALS 1015WP T10 8 ...
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Страница 195: ...DUAL HEAD CONFIGURATION 21614 C IN LINE CONFIGURATION FLOW ...
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Страница 198: ...L TEMPERATURE BELOW 225 F ONLY SUITABLE FOR AMBIENT TEMPERATURE GLAND SUPPLIED WITH CABLE IS 21614 C PART No L ...
Страница 208: ...Glossary FUP1010 IP67 Portable 162 Operating Instructions 03 2012 A5E02951522 02 ...
Страница 212: ...Index FUP1010 IP67 Portable 166 Operating Instructions 03 2012 A5E02951522 02 ...
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