NARDA FieldMan, Руководство пользователя

Страница: 83 / 126

8.6 Shaped Time Domain
Narda FieldMan
83
8.6 Shaped Time Domain
In the
SHAPED TIME DOMAIN
operating mode, an evaluation method is used in the
time domain, which ensures gapless recording of the weighted peak or RMS values
related to a selectable personal protection standard. The result is displayed as an expo -
sure index in %.
The applied measurement method is described in international standards and is gener
-
ally referred to as
Weighted Peak Method
or
Weighted RMS Method
respectively.
In addition to the numerical result display, a logarithmically scaled bar display shows the
exposure index graphically over the entire measurement range of the probe. Instead of
the bar display, a time curve graph can also be displayed.
8.6.1 Measurement settings
The
SHAPED TIME DOMAIN
operating mode is only available for the EHP-50F/G and
BFD-400-1 probes.
The
MEASUREMENT SETTINGS
menu provides quick access to the most important
measurement settings for the selected operating mode.
Function
1)
Description
Reset Results
Reset measurement results
Field
Electric or magnetic field
Range
Measuring range
Low Cut Filter
(BFD-400-1 only)
Selection of the lower cutoff frequency, e.g. to reduce the
influence of the earth's magnetic field
Method
Method for weighting:
• WPM-TD (IEC/EN 62311): Weighted Peak Method
(fixed for the EHP-50F/G probe)
• WRM-TD (IEC/EN 62233): Weighted RMS Method
Weighting
Displays a selection list of standards according to whose
limits the evaluation is performed.
Time Curve
Graphic display:
• Bar display:
Time Curve
=
Off
• Time curve graph:
Time Curve
=
On