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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 A 34/A 34M.
1.6 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this test method, SI units are shown in brackets. 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 nonconformance with the test method.
1.7 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
ICS Number Code 17.220.20 (Measurement of electrical and magnetic quantities)
UNSPSC Code 31380000(Magnets and magnetic materials)