ASTM-A772 2000

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A772/A772M-00 Standard Test Method for ac Magnetic Permeability of Materials Using Sinusoidal Current

Published By	Publication Date	Number of Pages
ASTM	2000	4

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Category: ASTM

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Description

ASTM A772/A772M-00

Historical Standard: Standard Test Method for ac Magnetic Permeability of Materials Using Sinusoidal Current

ASTM A772/A772M

Scope

1.1 This test method provides a means for determination of the impedance permeability (µ^z) of ferromagnetic materials under the condition of sinusoidal current (sinusoidal H) excitation. Test specimens in the form of laminated toroidal cores, tape-wound toroidal cores, and link-type laminated cores having uniform cross sections and closed flux paths (no air gaps) are used. The method is intended as a means for determining the magnetic performance of ferromagnetic strip having a thickness less than or equal to 0.025 in. [0.635 mm].

1.2 This test method shall be used in conjunction with those applicable paragraphs in Practice A34/A34M.

1.3 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets except for the sections concerning calculations where there are separate sections for the respective unit systems. 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 this standard.

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 and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

magnetic field strength; magnetic flux density; magnetic induction; permeability; sinusoidal current; toroidal core

ICS Code

ICS Number Code 29.030 (Magnetic materials)

DOI: 10.1520/A0772_A0772M-00

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Significance and Use Apparatus
2	Procedure Calculation (Customary Units) FIG. 1 FIG. 2
3	Calculation (SI Units)
4	Precision and Bias Keywords

Additional information

Standard Title	A772/A772M-00 Standard Test Method for ac Magnetic Permeability of Materials Using Sinusoidal Current
Published Code	ASTM
Publication Date	2000
Pages Count	4