NARDA ELT-400, Operating Manual

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5-1
5 Operation and use
5.1 Operating modes
Direct numerical display of:
•
Safety margin compared with the exposure limit values specified in
standards (“Exposure STD” mode)
•
Field strength (“Field strength” mode)
•
Also for specialized analysis using an oscilloscope or FFT analyzer
(Active Probe).
Exposure STD mode
In “Exposure STD” mode, the level of the magnetic field (B field) is displayed
directly as a percentage of the reference value, regardless of the signal
shape and frequency. The user simply selects the desired standard. The
required frequency response for the limit values is emulated by means of
internal filters.
Advantages of the ELT-400:
•
Instant display of current situation and safety margin without needing to
refer to the standards.
•
Automatic allowance for various signal shapes as well as for pulsed
fields without need for in-depth knowledge of the field, the instrument or
the device under test.
•
Continuous monitoring of the field with any change being evaluated
immediately.
•
Default setting takes RMS and peak values into account simultaneously.
The appropriate detector is selected continuously and automatically,
depending on the test signal and the selected standard. The detectors
can also be selected independently to provide more information about
the signal.
Field strength mode
“Field strength” mode is useful if the field to be measured only contains a
relevant frequency component. The result is displayed in mT or
µ
T.