ETS-Lindgren HI-3627, User Manual

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ets-lindgren.com Introduction 9
1.0 Introduction
The HI-3627 ELF Magnetic Field Meter is designed to measure the flux
density of magnetic fields in the frequency range of 5 Hz to 2 kHz. The
HI-3627 finds application in the measurement of magnetic fields
associated with electric power lines and electrically operated
appliances.
The HI-3627 is a three axis flux density meter designed to be
responsive to either sinusoidal or complex magnetic field waveforms. It
computes the root-mean-square (RMS) value of magnetic flux density
and directly displays it on an analog meter. The sensor consists of
three multiturn loops connected to the instrumentation readout
package via a 1.2 meter long cable. The microprocessor in the meter
continually computes the magnitude of the field independent of the
probe orientation. This allows quick assessment of the actual flux
density value while conveniently holding the instrument for easy meter
reading. This feature makes the HI-3627 especially useful for rapid,
large area surveys of magnetic fields.
The field sensor is electrically shielded making the response of the
HI-3627 immune to most electric field effects. No interference is
caused by ambient electric fields such as might be found beneath high
voltage, overhead electric power lines or nearby radio or television
stations.
The HI-3627 has a wide dynamic measurement range. This provides
for readings from 0.2 milligauss to 20 gauss. This large dynamic range
makes the HI-3627 convenient for measurement of ambient residential
magnetic fields as well as high level fields found near high current
carrying conductors or electrical machinery.