NARDA NBM-550, Operating Manual

Page: 59 / 156

5.3 Measuring the spatial average
Narda NBM-550
49
Setting the averaging time
You can set the time used to form the average for
Average
and MaxAvg
display types in the range 4 s to 30 min in
2 second steps.
Setting the time and resolution
1. Open the
Averaging Time
function
(MAIN/MEASUREMENT SETTINGS/...).
2. Select the digit using the
<
/
>
function keys.
3. Change the value using the arrow keys
▲
/
▼
.
4. Press the
OK
key to confirm the settings.
5.3 Measuring the spatial average
You can determine the spatial average of the field strength
using the Spatial Average function. This function is used to
determine the exposure to electromagnetic radiation of the
human body, for example.
Two measurement methods are available:
•
Discrete
Individual results are recorded and averaged. You can
measure at specific locations using this method.
•
Continuous
Results are recorded and averaged continuously during
the time that the probe is moved around the area of
interest. You can measure the field strength affecting a
particular space using this method.
Selecting the measurement method
1. Open the
Spatial AVG Mode
function
(MAIN/MEASUREMENT SETTINGS/Next/...).
2. Use the arrow keys
▲
/
▼
to select the method and press
the
OK
key.