This procedure is applicable to the initial calibration, subsequent calibration and in-use inspection of near-area electric field measuring instruments with a frequency range of 100 kHz to 200 MHz and a common field strength range of 10 V/m to 150 V/m.
JJG 561-2016 Referenced Document
IEEE 1309-2005 Calibration of Electromagnetic Field Sensors and Probes, Excluding Antennas, from 9 kHz to 40 GHz