ASTM-F2070 Standard Specification for Transducers, Pressure and Differential, Pressure, Electrical and Fiber-Optic

ASTM-F2070 - 2000 R17 EDITION - CURRENT
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This specification covers the requirements for pressure and differential pressure transducers for general applications. Pressure transducers typically consist of a sensing element that is in contact with the process medium and a transduction element that modifies the signal from the sensing element to produce an electrical or optical output. Some parts of the transducer may be hermetically sealed if those parts are sensitive to and may be exposed to moisture. Pressure connections must be threaded with appropriate fittings to connect the transducer to standard pipe fittings or to other appropriate leak-proof fittings. The output cable must be securely fastened to the body of the transducer. Most common sensing elements are diaphragms, bellows, capsules, Bourdon tubes, and piezoelectric crystals. The function of the sensing element is to produce a measurable response to applied pressure or vacuum. The response may be sensed directly on the element or a separate sensor may be used to detect element response. The following are the different types of electrical pressure transducers: differential transformed transducer, potentiometric transducer, strain gage transducer, variable reluctance transducer, and piezoelectric transducer. Different kinds of fiber-optic pressure transducers shall be discussed: Fabry-Perot interferometer, Bragg grating interferometer, quartz resonator, and micromachined membrane/diaphragm deflection. The following physical properties of transducers shall be determined: enclosure, transducer mounting, external configuration, standard electrical connection, pressure connections, damping, size, and weight. Different tests shall be conducted in order to determine the service life and overall performance of the transducers.

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Scope

1.1 This specification covers the requirements for pressure and differential pressure transducers for general applications.

1.2 Special requirements for naval shipboard applications are included in Supplementary Requirements S1, S2, and S3.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. Where information is to be specified, it shall be stated in SI units.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

differential pressure transmitter; fiber-optic pressure transducer; miniature; optoelectronics module; pressure and differential pressure transducers; pressure transmitter; sensing element; sensor head; transduction element;; ICS Number Code 17.100 (Measurement of force, weight and pressure)

To find similar documents by ASTM Volume:

01.07 (Ships and Marine Technology)

01.08 (Fasteners; Rolling Element Bearings)

To find similar documents by classification:

17.100 (Measurement of force, weight and pressure Including measuring and weighing instruments)

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Document Number

ASTM-F2070-00(2017)

Revision Level

2000 R17 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Aug. 15, 2017

Document Type

Specification

Page Count

32 pages

Committee Number

F25.10