Holaday Industries HI-3624, User Manual

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Page 8 HI-3624 / HI-3624A Manual
rotated within a constant field, there will be an output from the
sensor at a frequency corresponding to the movement and this
will usually include frequency components greater than 5 Hz.
Consequently, during such movement, the meter will typically
show significant upscale indications. The 5 Hz frequency cutoff
setting is primarily useful for measurements at fixed coil
positions such as near VDTs, in which case the sensor is not
being moved. For area surveys of ELF fields, the 30 Hz cutoff
will be more useful.