User Manual

480836 V2.0 July 2007 13
4-5-7 Setting the backlight auto off function off
UNIT
1. Press
key to turn off the meter.
2. Press and hold key and turn on the meter again to disable the backlight
auto off function.
4-6 Making measurements
Important:
If the sensor is moved 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 the 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 neighboring vicinity for 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 “Average ” or “Max average” modes only when the instantaneous
measurement values are fluctuating greatly.
4-6-3 Alarm function
Use this feature in the “Instantaneous”, “Max. Instantaneous”, “Average” or “Max.
Average” modes.
When the instantaneous measured value exceeds the limit value, a sequence of
warning beeps will sound.