IEEE 1140

Abstract

This standard provides procedures for the measurement of electric and magnetic fields in close proximity to video display terminals (VDTs) in the frequency range of 5 Hz to 400 kHz. This standard adapts existing international measurement technologies [B7]¹ and practices to achieve a consistent and harmonious VDT measurement standard for testing in a laboratory controlled environment. Such measurements are needed for investigative studies that rely on the knowledge of electric and magnetic field levels near electronic equipment.<br>The requirements of the controlled laboratory test environment in which the characteristics specified in this standard are to be tested are difficult to establish at a user&apos;s installation. Therefore, it is recognized that the results obtained in the laboratory may be difficult to reproduce in the on-site environment.<br>This standard does not provide measurements at specific frequencies, but does provide one measurement for each of two frequency bands: 5 Hz to 2 kHz and 2 kHz to 400 kHz.<br>¹The numbers in brackets preceded by the letter B correspond to those of the bibliography in clause 8.