Automation

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TABLE OF CONTENTS

Section

VOLUME 4—FLOW & LEVEL MEASUREMENT Topics Covered • The Flow Pioneers • Flow Sensor Selection • Accuracy vs. Repeatability

Turbulent Velocity or Flow Profile Laminar Velocity Flow Profile E D V

Page

1

A Flow Measurement Orientation

08

Magnetic Coil

E

Figure 1-3: Faraday's Law is the Basis of the Magnetic Flowmeter

2

Differential Pressure Flowmeters

• Primary Element Options • Pitot Tubes • Variable Area Flowmeters

Wedge Flow Element

H L

D

H

16

B) V-Cone

A) Segmental Wedge Figure 2-8: Proprietary Elements For Difficult Fluids

3

Displacer

Mechanical Flowmeters

• Positive Displacement Flowmeters • Turbine Flowmeters • Other Rotary Flowmeters

Figure 3-7:

1st Detector

Flow Tube

2nd Detector

Flow

34

Calibrated Volume

1.00

4

Electronic Flowmeters

• Magnetic Flowmeters • Vortex Flowmeters • Ultrasonic Flowmeters

0.95 0.90 K 0.85 0.80 0.75 K = 0.75 For Laminar Flow 0.70 1 10 100 1,000 Re Figure 4-6: 10

4

K = 1 Asymptote For Flat Profile

46

10

5

10

6

10

7

Mass Flowtube Enclosure

Support (Typical) Mass Tube Enclosure Flow Direction Arrow

5

Mass Flowmeters

• Coriolis Mass Flowmeters • Thermal Mass Flowmeters • Hot-Wire Anemometers

Support

Flanges Pipe/Flowtube Junction

NOTE: Distance Between Pipe/Flowtube Junction and Support Must Not Exceed 15 Inches

Flow Direction Arrow A)

B)

NOTE: Distance Between Pipe/Flowtube Junction and Support Must Not Exceed 15 Inches

58

'V' Block Clamp (Can Be Inverted)

'U' Rest C)

'V' Rest

'V' Bolt Clamp

Inverted Pipe Hanger Clamp

Figure 5-5:

04

Volume 4

TRANSACTIONS

REFERENCE SECTIONS

Editorial About OMEGA

06 106 Information Resources 07 110 Glossary

Section

VOLUME 4—FLOW & LEVEL MEASUREMENT Topics Covered • Level Sensor Selection • Boiling & Cryogenic Fluids • Sludge, Foam, & Molten...