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4-6 Making measurements
Important:
The following effect will be noted with all field strength meters:
If move the sensor quickly, excessive field strength values will
be displayed which do not reflect the actual field conditions.
This effect is caused by electrostatic charges.
Recommendation:
Hold the meter steady during the measurement.
4-6-1 Short-term measurements
Application:
Use either the “Instantaneous” or the “Max. instantaneous”
mode, if the characteristics and orientation of the field are
unknown when entering an area exposed to electromagnetic
radiation.
Procedure
1. Hold the meter at arm’s length.
2. Make several measurements at various locations around
your work place or the interested areas as described above.
This is particularly important if the field conditions are unknown.
3. Pay special attention to measuring the vicinity of possible
radiation sources. Apart from active sources, those
components connected to a source may also act as
radiators. For example, the cables used in diathermy
equipment may also radiate electromagnetic energy. Note
that metallic objects within the field may locally concentrate
or amplify the field from a distant source.
4-6-2 Long-term exposure measurements
Location
Place the meter between yourself and the suspected source
of radiation. Make measurements at those points where
parts of your body are nearest to the source of radiation.
Note: Use the “Max average” modes only when the
instantaneous measurement values are fluctuating
greatly.
You may fix the meter to a wooden or plastic tripod.
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