Sd Memory Card - Gigahertz Solutions NFA 1000 Operating Manual

4.5 Evaluation of Signal
Signal
tRMS = "true Root Mean Square". The values displayed and rec-
tRMS
orded can be compared directly to classifications recommended
Hold by building biologists.
Peak
Real peak value measurement: With this setting the meter
measures the highest culminating point of the wave
for building biologists 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 frequen-
cies. This option supplies important information for the evaluation of "Dirty Power"
(E-field > 2 kHz).
= retain maximum value
Hold
Retains „tRMS" or „Peak" of the signal, depending on the switch position from
which „Hold" was chosen. When the signal switch is set to „Hold" only the reading
on the display is held, the real time value will still be recorded onto the SD card, if
recording.

4.6 SD Memory Card

This is the slot for the SD card. To prevent it from being ejected inad-
vertently slide it in beyond the external surface of the casing until it
snaps (use fingernail or pencil, if necessary). To extract it press again
to undo the snap mechanism.
The high-speed SD memory card (4 GB, SDHC) supplied with the
instrument contains the current version of the NFAsoft software and enough
memory for a continuous long-term recording of more than one week.
Your PC will recognize the SD card as an external device when connected by USB
cable or slid into a card reading device. It can then be processed with the standard
Windows or Linux functionality. By inserting the SD memory card directly into a card
reader of the PC, data transfer will be 40 times faster than by using the USB cable
Please note: Do not remove the SD memory card while the NFA is running!
7 Not to be mixed up with the „Hold"-function, which, in case of fluctuating fields „freezes" the highest reading.
The resolution of the frequencies during the analysis of the (actually by their nature broadbanded) peak values
does not consider phase information that is being a worst-case consideration. Tolerances are much higher than
using the tRMS analysis. It cannot be used with the floating potential E-field measurement for the time being.
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In order to make use of this speed advantage, your SD card reader needs to be specified „SDHC" which is
standard for units built 2008 or later. For older units inexpensive adaptors are available. The SD-card reader is
included in the scope of supply of the NFA 1000 only.
350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
tRMS = true RMS value
peak = Peak value
7 . A new measurement feature
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© Gigahertz Solutions GmbH