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Description of ASTM-A698 2007ASTM A698 / A698M - 07Standard Test Method for Magnetic Shield Efficiency in Attenuating Alternating Magnetic FieldsActive Standard ASTM A698 / A698M | Developed by Subcommittee: A06.01 Book of Standards Volume: 03.04 ASTM A698 / A698MSignificance and Use This test method provides an easy, accurate, and reproducible method for determination of shielding factors (attenuation ratios) in simple alternating magnetic fields. Since the sensing or pickup coil is of finite size, the measured shielding factor tends to be the average value for the space enclosed by the coil. Due care is required when interpreting results when the coil is located near an opening in the shield. This test method is suitable for design, specification acceptance, service evaluation, quality assurance, and research purposes on magnetic shields. 5.4 Provided geometrically identical shields are compared, this test method is also suitable for evaluation and grading of magnetic shielding materials. 1. Scope 1.1 This test method covers the 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 a means of evaluating and grading magnetic shielding materials to determine their suitability for use in the production of magnetic shields. 1.3 This test method shall be used in conjunction with and shall conform to the requirements of Practice A 34/A 34M. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.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 and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials A340 Terminology of Symbols and Definitions Relating to Magnetic Testing Keywords attenuation ratio; Helmholtz coil; magnetic shield; pick-up coil; shielding factor; ICS Code ICS Number Code 17.220.20 (Measurement of electrical and magnetic quantities) DOI: 10.1520/A0698_A0698M-07 ASTM International is a member of CrossRef. ASTM A698 / A698MThe following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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