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May 2017 - 18 - © Gigahertz Solutions GmbH
5.3 Guided 6-Point-Measurement
of Working Places
The NFA and the NFAsoft also support the measure-
ment of working places. In this case six measuring
positions are to be collected, as shown in the draw-
ing. For a selection of the working place measurement
on the NFA keep the “Mode” button pressed until
“6Pt” is displayed on the LCD. For the further proce-
dure follow the instructions of the 9-Point-
Measurement in the order: head, elbow, bottom,
hands, knees, feet.
5.4 Long Term Data Logging
The normal approach in building biology is to record only the
AC magnetic field as tRMS. Recording the E-field usually
gives little additional insight but often causes confusion.
Recording the E-field leads to little or no additional insight
but often returns confusing or meaningless results. Record-
ing E-fields with external power supply is completely sense-
less for obvious reasons.
The interval for recording data is set to 10 data sets/sec.
Initiating Long Term Logging of the Meter
For a long-term recording of several hours or days, set the
“Power” switch to “Log”. (The status LED will turn green and
long-term recording will start off after a few seconds. In this
mode the LEDs and the sound are turned off to extend the
battery life, after a while also the green status LED.). The
display will show the logfile number (“L…”), the elapsed time
of recording as well as the remaining time of use in an infi-
nite loop until the battery is empty or the SD-card full. For
information on the display format please see chapter 3.1.
When switching back to “On”, recording will be continued
without interruption.
The instrument records all data corresponding to its field
selection switch. The fourth channel will automatically record
the E-field if the field selection switch is set to M3D and the
AC/DC socket is not connected. However, if an HF analyzer
is connected to the AC/DC socket, it will automatically rec-
ord the output of this external device.
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