Gigahertz Solutions NFA 30M Operating Manual page 6

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Available options for the AC/DC Socket
Connecting cable for an HF-Analyser for data logging high-frequency
(KAB0053). Potentially falsifying LF- or RF-inductions can reliably be
suppressed by means of our suppression kit (EDY).
An AC signal being connected to the AC/DC socket will by default be
displayed as total RMS signal in CH4. For the analysis and mitigation
of dirty power it is useful to have the signal of a current sensor ("cur-
rent clamp") to be split into the frequency ranges of the NFA (FA1).
example for an adequate current sensor is the MiniFlex MA 200 from Chauvin Arnoux.
4.4 Evaluation of Signal
tRMS = "true Root Mean Square". The values displayed
Signal
and recorded can be compared directly to classifica-
tions recommended by building biologists. This is the
tRMS
correct standard setting of the NFA, even for logging
Hold
the peak values of a connected HF-Analyser.
Peak
Peak = Real peak value measurement: With this setting
the meter measures the highest culminating point of the
wave 2 . A new, still experimental measurement feature for building biol-
ogists which allows for a more detailed analysis of the LF world in a
way which has long since been considered essential in the analysis of
high frequencies. This option supplies important information for the
evaluation of "Dirty Power".
Hold = Hold maximum value ("Max hold"). Retains "tRMS" or "Peak" of
the signal, depending on the switch position from which "Hold" was
chosen. When setting the signal switch to "Hold", the reading on the
display will be held, but the value recorded on the SD-card will still be
the real time value.
4.5 SD Memory Card
This is the slot for the SD memory card. To prevent the
card from accidentally being ejected, slide it in beyond
the external surface of the casing until it snaps (use fin-
gernail, if necessary). To extract it press to undo the
snap mechanism.
Your PC will recognize the SD card as an external de-
vice when the NFA is connected by USB cable or when it is slid into a
card reading device.
Use SANDISK's standard SDHC-cards for best performance.
2 The resolution of the frequencies during the analysis of the (actually by their
nature broad banded) peak values does not take into account phase information, so it's
practically a worst-case consideration. Tolerances are much higher than when using
the tRMS analysis.
April 2020
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© Gigahertz Solutions GmbH
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