Holaday Industries HI-3624 User Manual - page 9
HI-3624 / HI-3624A Manual
Page 1
Description
The HI-3624 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 to conform
with recent measurement guidelines issued in Sweden for
extremely-low-frequency (ELF) magnetic fields produced by
video display terminals (VDTs). The HI-3624 finds application
in the measurement of magnetic fields associated with electric
power lines, electrically operated appliances and VDTs.
The HI-3624 is a single axis flux density meter designed to be
responsive to either sinusoidal or complex magnetic field
waveforms such as produced by the vertical deflection systems
of VDTs. It directly displays the root-mean-square (rms) value
of magnetic flux density on an analog meter. The sensor
consists of a multiturn 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-3624 especially useful for rapid, large
area surveys of magnetic fields.
The field sensor loop is electrically shielded so that the response
of the HI-3624 is solely due to magnetic fields. No interference
is caused by ambient strong electric fields such as might be
found beneath high voltage, overhead electric power lines or
nearby radio or television stations.
The HI-3624 has a wide dynamic measurement range. This
provides for full scale ranges of as small as 2 milligauss to as
great as 20 Gauss. This large dynamic range makes the
HI-3624 convenient for measurement of ambient residential
magnetic fields as well as high level fields found near high
current carrying conductors or electrical machinery.