Standard Test Method for Magnetic Shield Efficiency in Attenuating Alternating Magnetic Fields

Importancia y uso:

5.1 This test method provides an easy, accurate, and reproducible method for determination of shielding factors (attenuation ratios) in simple alternating magnetic fields.

5.2 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.

5.3 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.

Subcomité:

A06.01

Volúmen:

03.07

Número ICS:

17.220.20 (Measurement of electrical and magnetic quantities)

Palabras clave:

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