NF EN 24006 : 1993

Committees responsible
National foreword
Glossary
Introduction
1 Scope
2 Symbols
3 Subscripts
4 General terms in fluid mechanics
5 Uncertainties
6 General terms related to the devices
7 Differential pressure devices
8 Critical flow measurement
9 Velocity-area methods
10 Tracer methods
11 Electromagnetic methods
12 Weighing and volumetric methods
13 Instability methods
14 Variable-area methods
15 Ultrasonic methods
16 Other methods
17 Meters (for the measurement of the volume of fluids)
Annex
A Bibliography
Figures
1 Diagram illustrating the terms relating to pressure
2 Diagram illustrating the terms relating to errors
    and uncertainties
3 Square-edged orifice plate with piezometer ring
4 Orifice plates
5 Nozzles
6 Classical Venturi tube
7 Truncated and conventional Venturi nozzle
8 Toroidal throat Venturi nozzle
9 Cylindrical throat Venturi nozzle
10 Propeller-type current-meter
11 Example of a Pitot static tube
12 Piston provers
13 Bell prover
14 Liquid displacement system
15 Soap-film burette
16 Ring balance
17 Principle of operation of a fluidic flowmeter, shown
    with the flow in one of the alternative modes
18 Principle of operation of the vortex-shedding meter
19 Principle of operation of the vortex precession
    meter
20 Diagram of a wake oscillator
21 Variable-area meter
22 Principle of operation of a cone-and-float meter
23 Orifice-and-plug meter
24 Gate-type meter
25 Spring-loaded variable-area variable-head meter
26 Principle of operation of the single-path diagonal-
    beam meter
27 Principle of operation of the multi-path diagonal-
    beam meter
28 Arrangement of transducers in a four-path diagonal-
    beam meter
29 Principle of operation of the cross-correlation
    ultrasonic meter
30 Principle of operation of the Doppler ultrasonic
    meter
31 Examples of rotary displacement meters
32 Gas turbine meter

Provides the terms to be used in the field of measurement of fluid flow in closed conduits and the corresponding symbols. But excludes terms which are self-evident which do not apply specifically to this field and those referring to very specific methods of measurement which cannot be the subject of standardization.