2.4 Dangers from electromagnetic fields
Narda NBM-550 9
2.4 Dangers from electromagnetic fields
Strong Fields
Very high field strengths can occur in the vicinity of
some radiation sources.
Do not cross or ignore safety barriers or markings.
Persons with electronic implants (e.g. heart
pacemakers) must avoid danger zones.
Measurement Errors
Metallic labels (stickers) affixed to the yellow sensor
area of the probe can lead to measurement errors,
usually an underestimation of the electromagnetic field
strength.
Affix labels of any type only to the black probe shaft.
If the instrument malfunctions, take it out of service and
contact your Narda Service Center. The addresses are
listed at the end of this operating manual and on the
Internet at http://www.narda-sts.com.
Probe is not operating properly
Possibly present high radiation values are not
recognized.
Check probes for proper operation with a signal source
before using this measuring instrument. This is
especially important for thermocouples because the
sensors can be affected by various mechanical and
environmental stressors.
Narda offers portable sources to accomplish this impor-
tant step (see “Accessories” on page 135).
Before beginning any RF radiation measurement, always
inform yourself of the frequencies and field strengths that
you could expect to encounter.
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