ASTM-A698 Standard Test Method for Magnetic Shield Efficiency in Attenuating Alternating Magnetic Fields

ASTM-A698 - 2020 EDITION - CURRENT
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Standard Test Method for Magnetic Shield Efficiency in Attenuating Alternating Magnetic Fields
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Scope

1.1 This test method provides means for determining the performance quality of a magnetic shield when placed in a magnetic field of alternating polarity.

1.2 This test method provides means for establishing the desired value of alternating magnetic field strength, of suitable uniformity, inside a standard test coil.

1.3 This test method provides tests for determining the strength of the alternating magnetic field inside the standard coil.

1.4 This test method provides tests for determining the attenuation of the established alternating magnetic field due to the insertion of a magnetic shield around the point of measurement.

1.5 This test method shall be used in conjunction with and shall conform to the requirements of Practice A34.

1.6 The values stated in either customary units (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents: therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

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

Keywords

attenuation ratio; Helmholtz coil; magnetic shield; pick-up coil; shielding factor

To find similar documents by ASTM Volume:

03.04 (Magnetic Properties)

To find similar documents by classification:

17.220.20 (Measurement of electrical and magnetic quantities Including measuring instruments, instrument transformers Electric energy meters in buildings, see 91.140.50)

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Document Number

ASTM-A0698_A0698M-20

Revision Level

2020 EDITION

Status

Current

Modification Type

Reapproval with Ed Change

Publication Date

July 10, 2020

Document Type

Test Method

Page Count

5 pages

Committee Number

A06.01