Gigahertz Solutions NFA 1000 User manual

© Gigahertz Solutions GmbH - 1 - 350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
NFA 1000
NFA 400
3D Low Frequency
Analyzer
with Data Logger
NFAsoft
Analysis and Configu-
ration Software
Operating Manual
(Version 6.2)

350-027_NFA1000400-6-2_EN-von-susanne as of October 2011 - 2 - © Gigahertz Solutions GmbH
Thank you!
We thank you for the confidence you have shown by buying this product. It allows
for a professional analysis of AC electric and AC magnetic fields according to inter-
nationally recognized guidelines and the recommendations of the building biology.
In addition to this manual you can watch the tutorial videos on our website con-
cerning the use of this meter.
Please note:
The only significant difference between the NFA 1000 and the NFA 400 in this man-
ual is the fact that the NFA 1000 allows a three-dimensional potentialfree measure-
ment of the E-field, while the NFA 400 can only be used for one-dimensional poten-
tialfree measurements of the E-field. This distinction is specified in detail in the rele-
vant chapters.

© Gigahertz Solutions GmbH - 3 - 350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
Contents
1 Quick Start Guide ............................................................................................ 4
2 NFA 1000 Front Cover..................................................................................... 5
3 LEDs / Display / Audio Signals ........................................................................ 6
4 Switches / Push-Buttons / Connectors........................................................... 9
5 How to Measure and Data-Log ......................................................................15
6 Power Supply .................................................................................................18
7 „NFAsoft“........................................................................................................20
8 Firmware-Update............................................................................................27
9 What if… (FAQ)...............................................................................................28
This manual is based on the firmware version 48 and NFAsoft version 109.
The firmware and software of the NFA will be continuously improved and made available via e-mail or download
from our homepage.
Features not yet implemented, but under development, are printed in GREY in this manual.

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1 Quick Start Guide
The instructions below refer to the factory default settings. These settings can easily
be customized with the help of the supplied software „NFAsoft“.
When you switch on the instrument the LCD will briefly show “batt” and the remain-
ing operation time in the log.-mode with the current capacity of the batteries.
Set all switches to their top position! (Auto, tRMS, M3D and On)
With these settings and the mode button, one can quickly and easily begin the con-
ventional measurement process, without detailed knowledge of the instrument´s fea-
tures.
The LCD display will now indicate the isotropic (3D) AC magnetic field strength as
the primary measurement.The coloured frequency LEDs above the LCD display
show the active frequencies, the red LED indicating the dominant one. The dominant
axis x, y or z is indicated by a red LED on the right of the LCD display. That’s it – no
further switches or steps needed.
NFA 1000:
To measure the E-field with ground-reference (1D) simply connect the grounding
cable. The NFA detects the attached cable and automatically shows the corre-
sponding AC electric field strengths and frequencies. The E-field measurement will
now be displayed as the primary measurement and the 3D magnetic field as the
secondary. By depressing the ‘mode’ button you can easily switch from this to the
3D magnetic field on the display.
To measure the three dimensional potential-free AC electric field, switch to E3D
and fix the instrument onto a potential-free rod or onto a support. By pressing the
‘mode’ button you can easily switch from this to the Z-axis of the AC magnetic field
on the display.
NFA 400:
For an E-field measurement simply switch to Ey. You now have two possibilities:
If the grounding cable is plugged in and connected to the ground potential,
you are measuring “against ground”.
If you attach the meter to a potentialfree rod or place it onto a support, you
are measuring “potential free”.
Press the ‘mode’ button to switch from this to the 3D magnetic field on the display.
Should the meter not do what you expect, please turn to the chapter on FAQs (fre-
quently asked questions) at the end of this manual (Chapter 9)!
Note: For potential-free e-field-measurements the highest accuracy will be reached when used without the
yellow silicone holster.

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2 Front Cover NFA 1000 and NFA 400
Analogous front cover for NFA 1000 and NFA 400
NFA 400: „Ey“
12-15 V
Y
X
Z
Power
Signal
Made in Germany R
GIGAHERTZ
Mode
NFA 1000
3D-NF-Analyser
5 Hz - 1000 kHz
Freq.
AC/DC
Peak
Rec.
Mode
mV
nT
mG
V/m
Band
E3D
M3D
tRMS
Auto
XYZ
On
Off
Log
I/O
X
Y
Z
Hold
/
TCO-Band I II

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3 LEDs / Display / Audio Signals
3.1 LEDs and Display
The measured value shown on the display ...
… is the unit adjacent to the solid green LED (primary measurement).
A flashing LED indicates the unit of the secondary measurement, which
can be selected by depressing the “Mode>” button .
In fields of very high magnetic intensity, the value will be displayed in uT
(microTesla), indicated by the red LED “X 1000”. Also the green LED will
then turn red indicating a change of scale. Both LEDs will start flashing red when the
measured values are higher than the instrument can display. Similarly, when meas-
uring body voltage, a change from mV to V for higher values is indicated.
Special LCD Display Messages
“Low Batt“: The rechargeable battery is low – please charge the battery
“Err.“: Short for ‘Error’. Indicates an erroneous configuration. This can occur when a
grounding cable or mains adapter is connected and potential-free E-field measure-
ment is selected. Select a different setting!
„----“: Instrument is in the process of determining the measurement, or the value is
too small to be measured.
„CHAr“: Instrument is being charged.
(For technical reasons “FULL” will be shown shortly before this, which is to be ignored)
„FULL“: During the charging process, with the mains adaptor connected, this indi-
cation means: charging process completed, battery loaded. During normal opera-
tion, however, “FULL” means the SD memory card is full.
The time indications are set up as follows:
„XXXd“: XXX days or
„Xd.XX“: X days and XX hours or
„XX.XX“: XX hours and XX minutes.
„XX.XX“: (with blinking dot): XX minutes und XX seconds.
It will be shown upon switching on the NFA and when logging (see chapter 5.4).
Due to the increased power consumption (LEDs, sound signal, etc), the remaining
battery life in the operating mode “ON” is reduced by up to 30%.

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Status and Frequency LEDs
The “Status” LED indicates the current mode of operation
“Red” means “instrument is being charged”.
“Yellow” means “measurement in progress, NO recording”.
“Green” means “measurement in progress WITH recording”,
however with the switch set to “log.” the “Status”-LED is switched off to extend battery life.
LEDs to indicate the applicable frequency bands:
The frequency-LEDs change their colour in propor-
tion to their contribution to the total field strength.
See below for details on LED display modes.
”16.7 Hz“: In use for railway lines in some Europe-
an countries. The reading also includes the 2nd
harmonic.
”50/60 Hz“
1
:Mains frequency. The bandwidth only
covers individual frequencies of 50 Hz and 60 Hz with their respective lock-in rang-
es.
”100/120 Hz“1:This LED indicates the contribution of the second through fifth
“even” harmonics. The strongest frequency can be numerically displayed when using “Freq” mode.
”150/180 Hz“1:This LED indicates the contribution of the third through fifth “une-
ven” harmonics. The third harmonics will presently be found in many homes and most offices as a signifi-
cant portion of the total measurement. The frequency of the strongest source can be numerically displayed when
using “Freq”.
”R < 2kHz“: Means “Remainder of frequencies below 2 kHz”.
This LED does not show the whole band, but only the sum of all frequencies below 2 kHz which are not covered
by the LEDs on the left.
”> 2kHz“: Comprises frequencies within the upper TCO-band of 2 KHz up to 1 MHz.
“x 1000”-LED
Turns red when the measurement scale increases.
1
The NFA automatically detects the mains frequency and adjusts the indication of its harmonics. With “Freq.”
the actual mains frequency can be determined exactly. The LED’s for 16.7 Hz, mains frequency and its harmon-
ics up to 2 kHz have a suitable lock-in range to cover mains fluctuations.

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There are two display modes for the frequency-LEDs:
“Simple/Steady“: (= preset)
2
The red LED represents the strongest frequency , and the yellow LED the second
strongest. The green LEDs indicate the total frequency range in the current setting.
“Full Information/Volatile”: This makes the LEDs rather unsteady/volatile. (To be
configured with NFAsoft)
The proportion of the respective frequency band in relation to the total signal is be-
ing displayed. These proportions are shown as follows
3
:
RED = DOMINANT (> 50%)
YELLOW = MEDIUM (< 50%)
GREEN = SMALL (< 10%)
3.2 Audio Signal
The acoustic signal is always linked to the respective measured value and has a
„Geiger Counter” characteristic, i. e. an increasing signal intensity will in turn cause
an accelerated rattling sound.
If the “Mode”-switch is set to „
/
“ , press the ‘Mode >’ button to turn the volume
up and the ‘Rec. >’ button to turn the volume down (and finally: off), as long as no
grounding cable is connected to the instrument.
Please note: For extra-precise measurement requirements turn the acoustic signal
volume down or even switch it off completely.
2
In order to allow for less fluctuations in this mode an internal high pass filter is switched on. With NFAsoft it can
be configurated to 16.7 and 50 Hz. Experience has shown that the best combination for a freehand measure-
ment is a filter set to 16.7 Hz for magnetic fields and to 50 Hz for electric fields. Electric fields of the 16.7 Hz
railway line power frequency (in some European countries) are quite rare indoors and can still be evaluated in the
“band” mode. They can still be separately evaluated with NFAsoft.
3
To make it more ergonomic for the user, frequencies below the nominal display resolution (that is < 0.1 V/m or
< 1 nT) are not indicated by an LED-signal but will still be recorded down to the noise level. Hysteresis: 9/12%
resp. 45/50%.

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4 Switches/Push-Buttons/Connectors
4.1 On / Off switch (“Power“)
“On” = Standard Measurement Setting
LEDs and acoustic signal remain activated for manual measurements
“Log” = Logging / long term recording
All LEDs and the acoustic signal are deactivated to save battery life during data log-
ging. This is the mode in which the instrument is most precise.
“Off” = Device is off
4.2 Field Selection for 3D Measurement
M3D = Magnetic field measurement (3D)
The isotropic point or magnetic field sensors are below the coordinate
system printed on the meter faceplate. The dominating axis is indicated
by a red LED next to the display.
XYZ = Axis indication
Here, the NFA 1000 will show either the magnetic or the electric field in its three in-
dividual components depending on the field type from which the switch was set to
“XYZ”, whereas the NFA 400 will only show the individual components of the mag-
netic field. Press the ‘Mode >’ button to switch from one axis to the other. Please
see chapter 4.9 for details to this or to the automated scrolling.
E3D(NFA1000) / Ey(NFA400) = Potential-free E-field measurement
The field sensor pairs for the X-, Y- and Z-axis (directions correspond to the imprint)
are situated within the meter close to the housing. For a proper measurement the
meter has to be set up more than 12 inches away from any metal objects on an in-
sulated “holder” (accessory PM1) or held with an insulated rod (accessory PM4s).
Also cables or probes must not be connected during this measurement setting. In
the case of an erroneous configuration, the display will indicate “Err.” until the con-
figuration is corrected or the setting is changed to magnetic field measurement. The
measuring person should avoid hectic movements and keep a distance of at least
1.5 m to the object of measurement.
Y
X
Z

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For E-field measurements against earth potential, please plug in the grounding cable
and
-switch to “M3D” (automatic adjustment) on the NFA 1000
-switch to “Ey” on the NFA 400.
4.3 Sockets for Inputs and Grounding
AC/DC = Combined AC/DC-Input
The moment you connect an external sensor, its signal will automatically
be displayed in mV and recorded, if required. For recording, make sure
the “Mode” switch is set to “Auto”.
AC: A displayed value of 2000 corresponds to “1Vpeak-peak“
4
.
DC: +/- 0.1 to 1500 mV, i.e. with an HF59B connected in the
coarse measuring range (scaled to 1.5 V DC), the device plots
measurement values from 1 to 15,000 µW/m²; the displayed val-
ue in mV is 10 times less than the actual reading in µW/m².
5
This input can also be used for the connection of an optionally available magneto-
static and electrostatic sensor (in preparation).
= Input socket for body voltage hand probe
Input for the connection of a hand probe for the measurement of body voltage in
mV. The connector is a 4 mm banana jack. For displaying and recording, set the
“Mode”-switch to
/
and plug in the grounding cable.
This is the only input which cannot be recognized automatically (being single-pole).
= Socket for the grounding cable
Allows the connection of a grounding cable for an E-field measurement with refer-
ence to ground (in compliance with TCO). This will be detected automatically by the
instrument and the display will change to E-field with reference to ground corre-
spondingly.
Socket for the TCO-conformed probe at the front end of
the meter
This is for the TCO-conformed probe available as an optional accessory from Giga-
hertz Solutions.
4
Note: The information produced by the frequency decomposition of a demodulated pulsed HF signal will, of
course, not provide any really useful data.
5
For other measuring ranges just compare the position of the comma and convert accordingly. Readings below
0.1µW/m² cannot be displayed or recorded because of noise-issues.

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4.4 Mode = Selection of Measurement Mode
Selects all measurement and display options of the instrument with
the field selector switch and the “Mode >” button. Configuration
errors will be detected and indicated by “Err.” on the display until
resolved.
When set to the NFA recognizes probes connected to it,
and shows the corresponding values. If there is no external probe
connected to the instrument, it will show the selected 3D field type.
By pressing the mode button, you can “toggle” between the prima-
ry and secondary display measurements. The secondary meas-
urement field is indicated by a short flashing of the corresponding
unit-LED.
and = Display of the individual frequency
bands resp. the exact frequency of the frequency bands
Selection of the individual frequency bands is possible by clicking the “Mode” but-
ton
6
. Please see chapter 4.9 for more details on this feature or on automated scroll-
ing.
/
= Capacitive body coupling / volume
In this setting, the display will show the signal generated by connecting a hand
probe. The grounding cable needs to be connected in order to assure proper meas-
urements. For volume regulation please see chapter 3.3.
6
If the 50 Hz high pass filter has been set with the help of the configuration part of the NFAsoft (maybe even as pre-setting), the
16.7 Hz LED will remain unlit. However, the filter only applies to the display in the “Auto”-mode and to loggings in the “All3D”-
channel. The aim is to tranquilize the display. Nevertheless, possible frequency components up to 16.7 Hz can be displayed by
using “Band” and “Freq.”.
Mode
Freq.
Band
Auto
/

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4.5 Evaluation of Signal
tRMS
= true RMS value
tRMS = “true Root Mean Square”. The values displayed and rec-
orded can be compared directly to classifications recommended
by building biologists.
peak
= Peak value
Real peak value measurement: With this setting the meter
measures the highest culminating point of the wave
7
. A new measurement feature
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).
Hold
= retain maximum value
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
8
.
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.
8
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.
Signal
Peak
tRMS
Hold

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4.7 USB-Socket
USB 1.0 computer interface connection: Used for meter configuration
with NFAsoft. Please take care to have the NFA switched off when
connecting or disconnecting the USB-cable!
4.8 Charging Socket
For the connection of external DC sources:
External supply: 12 V battery or 12 V DC power supply unit is sufficient
to keep the instrument operational for long term data logging, but will
not recharge the battery.
Charging: 15 to 18 V DC battery or AC adaptor is required to charge the instrument.
The instrument comes with an AC adaptor (Euro mains plug!), which can be
switched either to 12 or to 15 V. Measurements or recordings parallel to the charg-
ing procedure are technically possible, but not specified, therefore not to be rec-
ommended.
4.9 „Mode“ and „Rec.“ - Buttons for
Navigation and Voice Recording
In connection with the “Mode”-switch and the switch for selecting the field type, the
“Mode” and “Rec.” keys form part of the many special functions of this device.
They are not needed for a simple measurement of the 3D magnetic field.
“Mode” = Change of display mode or “Step ahead”
The configuration of the “Mode”-button is context sensitive.
If the “Mode”-button on the left is on “Auto”, the NFA recognizes external probes
connected to it, and displays their corresponding values. If a probe is not connected
to the instrument, it displays the selected (“primary”) field type.
Press and release the “Mode>” button to switch from the primary to secondary
measurement fields. The secondary or background measurement field is indicat-
ed by a quick flashing LED corresponding to the unit-LED.
1
2
-
1
5
V

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If the “Mode”-button on the left is on “Band” or “Freq.”,
Press and release the “Mode>” button to select the next frequency band (indi-
cated by the corresponding LEDs), and also the axis per band in the “XYZ”
mode.
Press and release the “Mode>” and “Rec>” buttons at the same time to display
the individual axis one after the other in an infinite loop until one of the buttons is
pressed again.
“Rec” = Record an audio note
Keep this button pressed and so activate the internal microphone to accept your live
comments. The microphone is positioned above the “Rec.” button (marked by the
hole in the casing lid). It is sufficiently sensitive to pick up audio comments from a
few metres distance.
While the “Rec.” button is pressed for taking your notes, these will be recorded in a
standard WAV file parallelly to logging value recordings. These audio notes will then
be directly allocated by NFAsoft to the corresponding recording times in the graph-
ic.
4.10 I/O - Microphone / Headset
Allows the connection of a mono headset for dictating or listening to the audio anal-
ysis.

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5 How to Measure and Data-Log
5.1 “Live”-Measurement
Of course the meter can be used the “conventional” way: simply switch it on, set the
required measurement parameters, and read the values recorded. When operating
in the conventional mode, the “Status-LED” will be yellow.
In addition, the device is capable of logging all settings as well as the measurement
values of all four channels at once (i.e. the three field axis values plus one additional
channel). This data is stored onto an SD-card for future analysis. This function can
be activated by temporarily switching the “Power” switch to “Log.” until the status
LED turns yellow. Then switch the “Power” switch back to “On”. Please note: When
logging with the power switch set to ”LOG” and changing the field of measurement
and recording (for instance from M3D to E3D), this will cause the recording session
to be closed and a new log file to be created.
These recordings can be annotated by real-time audio recordings which will be as-
signed automatically to the respective measurement for replay.
The following chapters 5.2 and 5.3 are only relevant for the NFA 1000.
5.2 Guided 9 Point Measurement
of Sleeping Areas
For alternating electric fields, the guidelines issued by the VDB
e.V., Germany, require a detailed analysis of the floating potential
electrical field in sleeping areas, specifying nine points (three
each in the head-, torso- and foot area, with the outer edge of the
instrument located 10 cm off the bed’s edge). The NFA in combi-
nation with NFAsoft allows for a “guided measurement” in order
to efficiently accomplish data collection and evaluation.
Preparation and start of the measurement:
Use the potential-free rod PM4s or the holder PM1 (stabilized by, for instance, a
stiff piece of cardboard or a plywood panel).
Switch the “Power”-button to “On” and choose “E3D”, “Auto” and “tRMS”
(choose M3D for magentic fields).
Press the “Mode”-button until 9Pt is indicated on the LCD and then let go. A
beep will indicate the activation of the 9 point measurement.

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The NFA guides the user through the nine points by means of short audio signals
(“beeps”). These nine points shall always be processed in the same order, head ar-
ea: left, middle, right, followed by torso area: left, middle, right and finally feet area:
left, middle, right.
The beeps are not time controlled but the NFA will adjust itself to your personal
work rhythm by “sensing” whether it is being moved or it is lying still
9
. This way
you can finish the nine point measurement within less than a minute or – if you
prefer to take it a bit slower – you need not let yourself “be rushed through the
measurement by the beeps”.
The algorithm is as follows: after the activation (see above) the NFA “waits pa-
tiently” to be moved (… that is being moved to the first measurement position:
top left) and it will not beep to confirm the next measurement before the instru-
ment has been left still in that position for a couple of seconds
10
(… in order to
pick up a valid measurement). After the beep – and in your speed – you can pro-
ceed to the next measurement position
11
.
PLEASE NOTE: In order to support this algorithm move the NFA more or less
rapidly from one measurement position to the next, and “bump” it onto the bed’s
surface with a little impact in order to give the transition movement a clear end
12
.
For an analysis of the collected data use NFAsoft.
5.3 Guided 6-Point-Measurement
of Working Places
The NFA and the NFAsoft also support the measurement of
working places. In this case six measuring positions are to be
collected, as shown in the drawing. For a selection of the work-
ing place measurement on the NFA keep the “Mode” button
pressed until “6Pt” is displayed on the LCD. For the further pro-
cedure 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, and
this as tRMS. Why only the magnetic field? Only AC Magnetic Fields are subject to
large fluctuations, as they depend on the actual current flow which is variable. The
interval for recording data is set to 10 data sets/sec.
9
The interval from beep to beep can vary between 3 and up to 20 seconds according to your work rhythm and
movement pattern.
10
This time delay is user-definable with NFAsoft.
11
After the beep the NFA will wait up to 20 seconds for a movement
12
This way the NFA can distinguish more reliably whether it is in motion or kept still. If you use the potential-free
rod PM4s then try not to move the instrument after you have “hit“ the measurement point, if you use a holder
then withdraw quickly to a minimum distance of 1.5 m and keep still there in order to avoid movement-induced
"pseudo-fields”.

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Initiating Long Term Logging of the Meter
For a long term recording of several hours or days, set the “Power” switch to “Log”.
In this mode the LEDs and the sound are turned off to extend the battery life. The
recording will start automatically after some seconds. The display will show the log-
file number (“L999”), the elapsed time of recording as well as the remaining time of
use in an infinite loop until the battery is empty or the SD-card full. For information
on the display format please see chapter 3.2.
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 con-
nected to the AC/DC socket, it will automatically record the output of this external
device.
“Locking” of the Instrument
“Locking” ensures that the instrument exclusively executes the predefined tasks
when left at the customer's place for long-term recordings. To lock, remove the SD
memory card from the instrument after predefining the measurement settings, set
the micro switch on the top left of the SD-card to “lock” or “write protect” and rein-
sert it. Note: The data will still be recorded!
IMPORTANT: Don't forget to unlock the SD memory card finishing the longterm
recording!

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6 Power Supply
6.1 Internal Rechargeable Battery
The instrument features high performance Lithium Ion rechargeable batteries
(2 x 3.7 V). When fully charged, they will last for up to 36 hours of continuous data
logging
13
.
6.2 Charging
To charge the battery set the AC adapter switch to 15 Volts. If the device is
switched off while charging, the display will show “CHAr” and the potential runtime
of the instrument with the current capacity status in an infinite loop. Measurements
or recordings during the charging process are technically possible, but not speci-
fied, and therefore not recommendable.
With a completely discharged battery only about one hour of charging time is suffi-
cient to operate the instrument for a couple of hours. To achieve the maximum op-
eration time, charging will take 12 to 15 hours. Once the full capacity is reached, the
instrument will stop charging automatically and will show "FULL" on the LCD.
6.3 External Power Supply
Switch the AC adaptor to 12 Volts. With a 32 GB SD card and an external power
supply (AC adaptor) you can continuously log at full speed for over two months.
Longterm recordings of the 3D magnetic field and the AC entry can also be done
using external power from an AC adapter. In this case, the adapter should be placed
as far as possible from the instrument and turned in such a way that the resulting
magnetic field is as low as possible, as it can influence the readings.
14
13
Please note that Li-Ion batteries, even when treated with care, will lose some of their original capacity within
one or two years and their typical life expectancy is 250-500 complete charge cycles. In this case please always
replace both batteries. For initialisation of the indication of the remaining battery life of the instrument please fully
unload and recharge the instrument once. If possible store in a cool place..
14
To determine the emission created by the AC adapter at the location of the NFA, proceed as follows:
-Place the instrument and adaptor into their measurement location
-Plug the AC adapter into the wall and to the NFA. Wait until the readings on the display stabilize.
-Disconnect the adapter from the NFA without changing its position and orientation; wait for the display to
stabilize.
This procedure will also be logged, and should be marked with an audio note. This will be accessible when
evaluating the logged data on the PC. Now potential disturbances can be noted on each axis and corrections
be made, if necessary.

© Gigahertz Solutions GmbH - 19 - 350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
6.4 Operation from a Standard 9 V
Alkaline Battery
If you run out of battery power while measuring, one can temporarily operate the
NFA from a standard 9 V alkaline battery. To change the battery, remove the NFA
from its protective holster, and open the battery compartment. Carefully pull off the
cables of the integrated lithium ion batteries from the PCB-connector and remove
the batteries. Make sure to remember their exact position, as they fit tightly! The
plugs are keyed so they cannot be connected incorrectly. Connect the 9 V alkaline
battery to the battery clip, insert it into the meter, and close the lid.
DO NOT TRY TO CHARGE A 9 VOLT BATTERY, whether rechargeable or alkaline,
INSIDE THE METER!

350-027_NFA1000400-6-2_EN-von-susanne as of October 2011 - 20 - © Gigahertz Solutions GmbH
7 „NFAsoft“
The provided software allows ...
for the analysis of the data logged by the NFA
for the configuration of the NFA according to your preferences and habits.
A double-click on the program-icon opens the window
shown on the left. Here you can chose between the tool for
the analysis of the data and the tool for the user-specific
configuration of your NFA .
The software is subject to continuous upgrade. The most
current revision can always be found for download on our
homepage.
System requirements
NFAsoft is compatible with Windows XP and above, or LINUX. NFAsoft requires no
installation – just double-click and start!
In some cases, it might be necessary to temporarily disable your anti-virus
software. Anti-virus software may interpret NFAsoft as a threat and hence might
disable or even erase it. It may be necessary to repeat this upon loading an upgrad-
ed version of NFAsoft. NFAsoft can be loaded and executed directly form the SD
memory card through a card reader or through the USB interface cable. The NFA is
supplied with a “Class 6 SDHC”-SD memory card (appropriate readers have been
available since 2008, adapters are available for older computers).
7.1 Data Analysis: File Types
A click on the button opens the program and a Windows-box for file selection.
The following file types are available (the consecutive numbering is independent
from the file type)
LOG00001.TXT log file (long time recording)
LOG00002.9PM 9-Point-Measurement (sleeping area)
LOG00003.6PM 6-Point-Measurement (workplace)
REC00004.WAV audio file (recorded note).