ETS-Lindgren HI-3624(A) Survey Meter - Manual (Page 7)

Introduction | 7
1.0 Introduction
The HI-3624A ELF Magnetic Field Meter is designed to measure the flux density
of magnetic fields in the frequency range of 30 Hz to 2 kHz. The Model
HI-3624A provides for a switch selectable measurement range from 5 Hz to 2
kHz. It finds application in the measurement of magnetic fields associated with
electric power lines and electrically operated appliances.
The HI-3624A is a single axis flux density meter designed to be responsive to
either sinusoidal or complex magnetic fields. It directly displays the root-mean-
square (rms) value of magnetic flux density on an analog meter. The sensor
consists of a multi-turn loop connected to the instrumentation readout package
via a one meter long cable.
The separate loop sensor provides for orientation of the sensor relative to the
various magnetic field polarization components. This allows quick assessment of
the greatest flux density value while conveniently holding the instrument for easy
meter reading. This feature makes the HI-3624A especially useful for rapid,
large area surveys of magnetic fields.
The field sensor loop is electrically shielded; consequently the response of the
HI-3624A is solely due to magnetic fields. No interference is caused by ambient
strong electric fields like those found beneath high voltage, overhead electric
power lines or nearby radio or television stations.