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HFW59D
High Frequency Analyser
For frequencies from 2.4 GHz to 10 GHz
Instruction Manual
Revision 1.5
This manual is subject to continuous updates, amendments and
adjustments. The most current version can always be found for
download on your local distributor’s homepage or under
www.gigahertz-solutions.de
Due to the rapid expansion of the sources of high frequency
radiation, we strongly recommend to repeat measurements at
regular intervals!
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Thank you!
We appreciate the confidence you have shown in purchasing this
HF Analyser. It will allow a professional analysis of the exposure
with high frequency (HF) radiation corresponding to the building
biology recommendations.
If you should encounter any problems, please contact us immediately. We are here to help.
For your local distributor please check:
www.gigahertz-solutions.com
Contents
Functions & Controls 2
Getting Started 1
Properties of HF Radiation and … 3
… Consequences for Measurements 5
Step-by-Step-Instruction to HF-Measurement 6
Guidelines, Limiting and Precautionary Values 12
Audio Analysis of Modulation 12
Use of Signal Outputs 13
Battery Management 14
Warranty 15
Service Address 16
Conversion Table outside back cover
Safety Instructions:
The HF analyser should never come into contact with water or be used outdoors
during rain. Clean the case only from the outside, using a slightly moist cloth. Do
not use cleaners or sprays.
Due to the high sensitivity level, the electronics of the HF analyser are very sensitive to heat, impact as well as touch. Therefore do not leave the instrument in the
hot sun, on a heating element or in any other damaging environment. Do not let it
drop or try to manipulate its electronics inside when the case is open.
The antenna entry is protected against overload. No damage can be caused by
especially mobile phones, wireless LAN routers or similar devices, no matter how
close they are to the antenna.
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Functions & Controls
The HF component of the testing instrument is shielded
against interference by an internal metal box at the antenna
input (shielding factor ca. 35 – 40 dB)
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1) Volume control for the audio analysis (on/off switch . ).
2) Jack, 3.5 mm: AC output for the modulated part of the signal,
for audio analysis via PC or headset.
3) Calibrated AC output 1 Volt peak-peak, proportional to the
field strength.
4) Jack, 12-15 Volt DC for charging the battery. AC adapter for
230 Volt/50 Hz and 60 Hz is included. For other Voltages/Frequencies please get an equivalent local AC adaptor with
the output parameters 12 – 15 Volt DC / >100mA.
Caution: If an alkaline battery is used, under no circumstances should the power adapter be connected at the same time,
otherwise the battery may explode.
5) Measurement ranges
max = 19.99 mW/m²
(= 19,990 µW/m²)
min = 1999 µW/m²
Scaling differs when applying the optionally available amplifier or damper!
6) Selector switch for signal evaluation. In the peak hold mode
you can choose a time setting for the droop rate (Standard =
“+”). The peak hold value can be manually reset by pressing
(13) “clear”.
7) A little bar on the very left of the LCD indicates the unit of the
numerical reading:
bar on top = mW/m² (Milliwatts/m²)
bar on bottom = µW/m² (Microwatts/m²)
8) DC output, allows you to connect additional instruments, e.g.
data logging devices for longterm recordings. Scalable to 1 V
DC full scale
.
9) Connecting socket for antenna cable. The antenna is inserted
into the cross slot at the front tip of the instrument.
10) Power Level Adapter Switch for external optional amplifier or
attenuator only
(not part of the standard scope of supply). For regular
use of the instrument the switch should be in pos. “0 dB”.
(Any
other position will shift the decimal point to an incorrect position).
11) ON/OFF switch. Using the top switch-position activates the
audio analysis mode.
12) Load indicator
13) Push button to reset peak hold.
(Push and hold for 2 seconds or until
the readings no longer drop)
14) Switch for selecting the Video Bandwidth.
Switches for rarely used functions are recessed in the casing of
the instrument.
Contents of the package
Meter, attachable antenna incl. cable, rechargeable battery pack
(in the meter), mains adapter, manual.
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Getting Started
Connecting the Antenna
Screw the SMA angle connector of the antenna connection into
the uppermost right socket of the HF analyser. It is sufficient to
tighten the connection with your fingers. (Do not use a wrench or
other tools because over tightening may damage the threads).
Normally, the sources of radiation in the frequency range subject
to measurement are vertically polarised. Therefore, the antenna
should ideally be aligned as shown in the photo below:
Important: Please do not bend or twist either of the antenna
cables.
For a horizontal antenna alignment please do not twist the cable
itself, but turn the whole measurement device into the right direction. With the help of the LED at the antenna tip you can control
the connection of the antenna cable to the device.
Please do not touch the antenna cable during measurement.
Further notes to the antenna
The SMA connection between the antenna and the meter is the
highest quality industrial HF connection of this size. Furthermore,
the semi-rigid antenna cable implied has excellent parameters for
the frequency range in question. It is designed for several hundred
bending cycles without causing losses to the quality of the measurements. The special implementation of a second “dummy” antenna cable is the subject matter of one of our pending patents,
and compensates the internal weakness of the “simple-log-perantenna” which is based on conductor plates. These are also
sensitive to frequencies below the specified bandwidth, thus possibly falsifying measurements in the principal direction. The antenna supplied with the meter can suppress these disturbances
by approx. 15 to 20 dB (in addition to the 40 dB of the internal
high pass filter).
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Checking Battery Status
If the “Low Batt” indicator appears in the center of the display,
measurement values are no longer reliable. In this case, the battery needs to be charged.
If there is no display at all upon switching the analyser on, check
the connections of the rechargeable battery. If that does not help
try to insert a regular 9 Volt alkaline, (non-rechargeable) battery.
If a non-rechargeable battery is used, do not connect the analyser to a charger / AC-adaptor!
Note
Each time you make a new selection (e.g. switch to another
measurement range), the display will systematically overreact for
a moment and show higher values which will, however, droop
down within a couple of seconds.
The instrument is now ready for use.
In the next chapter you will find the basics for
true, accurate HF-measurement.
Properties of HF Radiation…
This instruction manual focuses on those properties that are particularly relevant for measurements in residential settings.
Across the specified frequency range (and beyond), HF radiation
causes the following effects in materials exposed to it:
1. Partial Permeation
2. Partial Reflection
3. Partial Absorption.
The proportions of the various effects depend, in particular, on the
exposed material, its thickness and the frequency of the HF radiation. Wood, drywall, roofs and windows, for example, are usually
rather transparent spots in a house.
Minimum Distance
In order to measure the quantity of HF radiation in the common
unit “power density” (W/m²), a certain distance has to be kept
from the HF source.
For measurements in the lower frequency limits of the HFW59D,
the minimum distance between the antenna tip and the object of
measurement should be half a meter.
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Polarization
When HF radiation is emitted, it is sent off with a “polarization”. In
short, the electromagnetic waves propagate either vertically or
horizontally. Therefore, both planes of polarization ought to be
checked in order to identify the one applying to the object in
question. Please note that the antenna supplied with this instrument measures the vertically polarized plane if the upper surface
of the meter is held horizontically.
… and Consequences for the Execution of Measurements
When testing for HF exposure levels in an apartment, home or
property, it is always recommended to record individual meas-
urements on a data sheet. Later this will allow you to get a better
idea of the complete situation.
It is important to repeat measurements several times: First,
choose different daytimes and weekdays in order not to miss any
of the fluctuations, which sometimes can be quite substantial.
Second, once in a while, measurements should also be repeated
over longer periods of time, since a situation can literally change
“overnight”.
Even if you only intend to test indoors, it is recommended first to
take measurements in each direction outside of the building.
This will give you an initial awareness of the “HF tightness” of the
building and also potential HF sources inside the building (e.g.
WLAN access points, also from neighbours).
Furthermore, you should be aware that taking measurements indoors adds another dimension of testing uncertainties to the
specified accuracy of the used HF analyser due to the narrowness
of indoor spaces. According to the “theory”, quantitatively accurate HF measurements are basically only reproducible under socalled “free field conditions”, yet we have to measure HF inside
buildings because this is the place where we wish to know exposure levels. In order to keep system-immanent measurement uncertainties as low as possible, it is imperative to carefully follow
the measurement instructions.
As mentioned earlier in the introduction, even slight changes in
the positioning of the HF analyser can already lead to rather substantial fluctuations in measurement values. (This effect is even
more prevalent here than in the ELF range). It is suggested that
exposure assessments are based on the maximum value
within a locally defined area even though this particular value
might not exactly coincide with a particular point of interest in, for
example, the head area of the bed.
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The above suggestion is based on the fact that slightest changes
within the environment can cause rather major changes in the
power density of a locally defined area. The person who performs
the HF testing, for example, affects the exact point of the maximum value. It is quite possible to have two different readings
within 24 hours at exactly the same spot. The maximum value
across a locally defined area, however, usually only changes if the
HF sources are subject to change. This is why the latter value is
much more representative for the assessment of HF exposure.
Preliminary Notes Concerning the Antenna
The supplied logarithmic-periodic antenna (or aerial), has exceptional directionality. Thus it becomes possible to reliably locate
or “target” specific emission sources in order to determine their
contribution to the total HF radiation level. To know exactly the
direction from where a given HF radiation source originates is a
fundamental prerequisite for effective shielding.
The readings from the instrument’s display always reflect the integral power density at the measurement location coming from the
direction the antenna is pointing at (i.e. based on the spatial integral of the “antenna lobe”).
The LogPer antenna supplied is optimised for a frequency range
of 2.4 to 10 GHz. It covers the frequencies of both WLAN bands,
bluetooth, zigbee, various radar frequencies (especially also the
densely used frequency band from 8.5 to 9.5 GHz which includes
radar for the control and survey of the air and shipping traffic, as
well as further frequency bands used commercially or for military
purposes, especially for the directional radio. Critical medicals
consider these pulsed or spread spectrum modulated signals as
biologically especially harmful.
In order to avoid measurement values to be falsified by the often
dominant radiation sources from frequencies below, such as
DECT or GSM, the HFW59D is equipped with an internal high
pass filter at 2.4 GHz, causing these lower frequencies to be suppressed.
Step-by-Step-Instruction to
HF-Measurement
Procedure for the Quick Overview Measurement:
The HF analyser and antenna are to be checked following the instructions under “Getting Started”.
First set the measurement range (“Range”) switch to “max”. Only
if the displayed measurement values are persistently below approx. 0.10 mW/m², change to the measurement range “min”
(199.9µW/m²).
Set the “Signal” switch to “Peak”
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HF radiation exposure can differ at each point and from all directions. Even though the HF field strength of a given space changes
far more rapidly than in the lower frequencies, it is neither feasible
nor necessary to measure all directions at any given point.
Since there is no need to look at the display during an overview
measurement, you only need to listen to the audio signal. It is
very easy to walk slowly through in-door or out-door spaces in
question. In doing so, constantly move the antenna or the HF analyser with attached antenna in each direction. This will provide you
with a quick overview of the situation. In in-door spaces, antenna
movements towards the ceiling or the floor will reveal astonishing
results.
As already mentioned above, the aim of the quick overview
measurement is to identify the zones of local peaks, not to
supply exact data.
Quantitative Measurement
Once the relevant measurement points have been identified following the instructions in the previous section, the quantitative
and precise measurements can be started.
Setting: “Range”
Select the appropriate switch settings as described under “Quick
Overview Measurements“: First switch the Range switch to
“max”. Only switch to “min” if you’re constantly shown very low
values. Basic rule for measurement range selection:
Basic rule for measurement range selection:
As coarse as necessary, as fine as possible
Power densities beyond the designed range of the instrument
(display shows “1” on its left side with the range set to “max”) can
still be measured by inserting the attenuator DG20_G10, available
as an optional accessory. By setting the “ext. adapt.” switch to 20
dB on your instrument, you will ensure a correct display of the
measurement value (i.e. indication of unit and correct decimal
point).
The optional HF preamplifier HV20_2400G10, to be used as plugin into the antenna input socket, increases the sensitivity by a factor of 100. With the help of this, the meter reaches a theoretical
minimum resolution of 0.01 µW/m². The realistic minimum resolution is slightly lower due to the noise margin.
Measurement ranges of the HFW59D
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Range
Bar on LCD
Instrument as delivered,
i.e. without preamplifier or attenuator
("ext. adapt." to "0 dB")
Displayed value & unit
max
0.01 - 19.99 mW/m²
min
1 - 1999 µW/m²
Simply read out, no correction factor
Range
Bar on LCD
With ext. Attenuator DG20,
(“ext. adapt.” to “-20 dB")
Displayed value & unit
max
1 - 1999 mW/m²
min
0.1 - 19.99 mW/m²
Simply read out, no correction factor
Range
Bar on LCD
With ext. Preamplifier HV20,
(“ext. adapt.” to “+20 dB")
Displayed value & unit
max
0.1 - 199.9 µW/m²
min
0.01 - 19.99 µW/m²
Simply read out, no correction factor
Setting:
“Signal”
Peak / RMS
The following illustration shows the difference in the evaluation of
a pulsed signal if displayed as an average value reading or a peak
value reading (“RMS” and “Peak”):
HF-energy in µW/qm
peak value: 10
avg. value: 1
e.g. 1 pulse every 10 µS
With the switch set to “Peak”, the meter will display the full power
flux density of the pulse (10 µW/m² in the graph). With the switch
set to “RMS”, the meter will take the mean of the power flux density over the total period of time, for instance 1 µW/m² in the
above graph (=((1x10)+(9x0))/10).
With the switch set to “Peak” or “Peak hold”, the display will show
the “RMS value during the pulse”, which is a common practice in
the building biology.
Nevertheless, the “true” mean value is of great interest, too:
The “official” limit values are always based on mean value ex-
aminations. When analysing “official” measurement results,
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therefore, such as those for instance done for cell phone operators, it may be useful to have a possibility of comparison.
Users of professional spectrum analysers please note:
The value for pulsed radiation shown on the display of the Gigahertz Solu-
tions HF Analysers with the signal switch set to “Peak” corresponds to the
equivalent value in µW/m² resulting from the “Max. Peak” function of a modern spectrum analyser (elder spectrum analysers had a similar function mostly called “positive peak”).
The switch setting “RMS” corresponds the “true RMS” setting of a modern
spectrum analyser (elder spectrum analysers have a similar function mostly
called “normal detect”, as well as a setting for the video bandwidth adapted
to match the pulse).
Peak Hold
In the interior, local peak values are mostly subject to strong fluctuations (caused by multiple reflections). In order not to overlook
any local maxima (so called hot spots), indoor measurements
should, therefore, preferably be done with the “Peak hold” setting.
Switching impulses can cause “pseudo peaks” which will appear
on your display. These can be deleted by pressing and holding
the “clear” button for several seconds (while keeping the “clear”
button pressed, the measurement will turn into a regular peak
measurement). Releasing the “clear” button will trigger the period
during which the maximum value is to be determined.
In the “Peak hold” mode, the sound signal remains proportional to
the currently measured power flux density. This helps finding the
absolute maximum within the measured area.
The droop rate, at which the held peak value decreases over time can be controlled with the “+” and “-” switch. Even after several minutes, the value displayed is still within the specified tolerance. Nevertheless, the display should be
checked frequently in order to obtain the most accurate readings. In the case of
very high and short signal peaks, the holding capacity of the “Peak hold” function needs several recurrences (less than a second) to fully load.
Setting:
“VBW”
For the HFW59D, “VBW Maximum” is the standard setting with
which the most common sources of radiation within the meter
frequency range, i.e.
Radar (a short beep every few seconds) as well as
Wireless LAN in standby mode (a very quick “tuc-tuc-tuc-…”)
are displayed directly, without the need of any conversion factors.
In the process of up- and downloading data via wireless LAN or
within the upper LTE band, the so called crest factors need to be
additionally taken into consideration. In this case, the displayed
value needs to be taken by 4 (or doubled twice). With the help of
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the audio analysis, these signals can easily be distinguished from
the radar signals
1
.
Information on radar measurements:
For air and sea navigation, a radar antenna slowly rotates around
its own axis, thereby emitting a tightly bundled “radar ray”. Even
with sufficient signal strength, this ray can only be detected every
couple of seconds, for a few milliseconds. This requires special
measurement technology.
To be on the safe side, we recommend the following procedure
for the acoustic identification of a radar signal (a short “beep”
which will recur every few seconds, in extreme cases only every
12 seconds, in the case of reflections maybe also at shorter intervals):
Switch meter settings to “VBW Maximum” and “Peak hold” and
take several measurements of the radar signal from varying
measurement points in order to be able to identify the main direction of emission and to record the quantitatively correct measurement value.
If the location of the radar base is not known, the quasi isotropic
UBB antenna is particularly useful for the determination of the
maximum exposure values.
Quantitative Measurement:
Determination of Total Exposure
Hold the HF analyser from its rear side with a slightly outstretched arm.
In the area of a local maximum, the positioning of the HF analyser should be changed until the highest power density (the most
important measurement value) can be located. This can be
achieved as follows:
By scanning “all directions” with the LogPer to locate the di-
rection from which the major HF emission(s) originate. In
apartment houses also scan from top to bottom.
By rotating the HF analyser around its longitudinal axis up to
90°, thus taking into account the polarization plane of the HF
radiation.
By changing the measurement position and avoid measuring
exclusively in one spot, in order to avoid measuring exclusively
at a point of local or antenna-specific cancellation effects.
Some manufacturers of field meters propagate the idea that the
effective power density should be obtained by taking measurements of all three axes and calculating the result. Most manufacturers of professional testing equipment, however, do not share
this view.
1
Users of HF59B please note the different recommendations regarding the VBW settings
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In general, it is well accepted that exposure limit comparisons
should be based on the maximum value emitted from the di-
rection of the strongest radiation source.
To be on the safe side with exposure limit comparisons, it might
be useful to multiply the displayed value by a factor of 2, and take
the result as a basis for your comparison. This method is often
applied by building biologists in order to avoid to be assuming a
far lower exposure than realistically existent should the meter be
measuring in the lower tolerance field, taking into account, however, that this may lead to far too high values if the meter was to
be measuring in the higher tolerance area.
Quantitative Measurement:
Identification of HF inflow
As a first step eliminate sources from within the same room (e.g.
wireless LAN). Once this is completed, the remaining radiation will
originate from outside. For remedial shielding it is important to
identify those areas of all walls (including doors, windows and
window frames!), ceiling and floor, which are penetrated by the
radiation. To do this one should not stand in the centre of the
room, measuring in all directions from there, but monitor the permeable areas with the antenna (LogPer) directed and positioned
close to the wall
2
. That is because the antenna lobe widens with
increasing frequency. In addition reflections and cancellations
inside rooms make it difficult and often impossible to locate the
“leaks” accurately. See the illustrating sketch below!
wall
antenna
wall
antenna
potentiell
durchlässiger
Bereich
wrong!
right!
potentially HF-permeable
part of the wall
The uncertainty of loca lization with HF-antennas
The shielding itself should be defined and surveyed by a specialist
and in any case the area covered by it should be much larger than
the leak.
2
Please note: In this position the readings on the LCD only indicate relative highs
and lows that cannot be interpreted in absolute terms.
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Guidelines, Limiting and
Precautionary Values
The official regulations in many countries specify limits far beyond
the recommendations of environmentally oriented doctors, “building biologists” and many scientific institutions and also those of
other countries. They are vehemently criticised, but they are nonetheless “official”, and often the basis for authorization procedures.
The limit value is frequency-dependent and in the HF range of
interest here lies between 4 and 10 W/m² (1 W/m² = 1,000,000
µW/m²). It is based on an average value evaluation, which building
biologists consider far too low. The same point of criticism also
applies to the official limit values of other countries, as well as of
the ICNIRP (International Commission on Non-Ionizing Radiation
Protection) – the so-called non-thermal effects of EMF are neglected. This is also “officially” described in a commentary published by the Swiss Federal Office for Environment, Forest and
Landscape dated Dec. 23, 1999. These “official” limits are far beyond the range of this instrument, which is optimized for accurate
measurement of power densities targeted by the building biologists.
The building biology guideline SBM 2015 classifies the following
steps:
Building biology guideline acc. to SBM-2015
© Baubiologie Maes / IBN
Anomaly none slight strong extreme
(µW/m²) < 0,1 0,1-10 10-1000 > 1000
The "Bund fuer Umwelt und Naturschutz Deutschland e. V."
(BUND) proposes 100 µW/m² outside buildings. In view of the
shielding properties of normal building materials, far lower values
exist inside buildings.
In February 2002 the Medical Authority of the Federal State of
Salzburg, Austria, recommends to reduce its “Salzburger Precautionary Recommendation” from 1,000 µW/m² to 1 µW/m² inside
buildings and 10 µW/m² outside. These limits are based on empirical evidence over the past few years.
In summary it confirms the justification of precautionary limits
well below the present legal limits.
Users of mobile phones and Wifi please note: Even at signifi-
cantly lower power flux densities than the strict values recommended by the SBM for pulsed radiation, i.e. at values of approx.
0.01 µW/m², you will always have excellent cell phone and wireless LAN reception.
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Audio Analysis of Modulation
The audio analysis of the modulated portion of the HF signal helps
to identify the source of a given HF radiation signal. There is a
selection of audio samples on our homepage (high frequency meters).
How to proceed:
For audio analysis, simply turn the volume knob of the speaker at
the top of the case all the way to the left (“-”). If you are switching
to audio analysis while high field strength levels prevail, high volumes can be generated quite suddenly. This is especially true for
measurements which are to be taken without audio analysis. The
knob is not fastened with glue to prevent over winding. However,
if by accident you should turn the knob too far, simply turn it back
again. No damage will be caused.
The volume can be controlled with the “audio” knob. Note: The
power consumption of the speaker is directly proportional to the
volume.
Use of Signal Outputs
AC output:
The AC output “PC/head-set”, 3.5 mm jack socket, is meant for
in-depth analysis of the AM/pulsed content of the signal by headset.
DC output (2.5 mm jack socket):
For a (longterm) recording of the display value. When “Full Scale”
is displayed, it has 1 VDC output.
The normal auto power off function is automatically deactivated
as soon as external devices are connected, and is only automatically reactivated if a total discharge is imminent.
Further Analysis /
Optional Accessories:
Available from Gigahertz Solutions:
For increasing the measurement range of the HFW59D:
Preamplifier HV10 for measuring very weak HF signals with a
higher resolution.
Attenuator DG20_G3 for measuring extra strong HF signals.
HF-Analysers < 2,4 GHz
Meters for the low frequencies: Also for this frequency range,
Gigahertz Solutions offers a broad range of professional measurement technology. The new NFA series, for instance, which
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allows a three-dimensional measurement of alternating electrical and magnetic fields.
Data loggers: All NFA-meters, starting from the NFA30M, can
equally be applied as data loggers for long-term recordings
with our HF analysers (only those with DC output).
Battery Management
The instrument comes with a rechargeable, high quality internal
NiMH-Battery. The quality of these high-capacity NiMH batteries
(far better than NiCd batteries, for instance) can be best maintained if they are almost totally discharged (i.e. used) before being
fully recharged (for > 13 hours or until the green charging LED
turns off). The loading procedure is started by switching the meter
on and off once only after connecting it to the power supply unit.
Changing the rechargeable Battery
The battery compartment is at the back of the analyser. To remove the lid, press on the grooved arrow and pull the cap off.
Insert only rechargeable batteries. If you use regular alkaline
(non – rechargeable) batteries do not use a charger or ACadapter!
Auto-Power-Off
This function conserves energy and extends the total operating
time.
1. In case you have forgotten to turn OFF the HF analyser or it
has been turned ON accidentally during transport, it will shut
off automatically after 40 minutes.
2. If “low batt” appears vertically between the digits in the center of the display, the HF analyser will turn OFF after 3 min in
order to avoid unreliable measurements. In that case charge
the rechargeable battery.
3. The built-in function, Auto-Power-Off, will automatically be
de-activated by plugging in a 2.5 mm DC. The function will
also automatically be re-activated to prevent a total discharge
of the battery by further operation.
Mains operation
The HF analyser can also be supplied with power by using the
mains adapter (for instance for long-term measurements in combination with the NFA). When doing so, please take care to turn
the volume button right down to zero (“-”), otherwise you might
hear the 50 Hertz noise of the mains voltage.
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Interferences may, however, also be caused by high frequency
couplings through the power supply unit. This can easily be tested
by unplugging the power supply
unit from the meter while in use.
If the measurement value now
shows a significant drop, this is
a sign of an unwanted coupling.
For long-term measurements,
the more reliable solution is to
use a car battery with short cable to the power supply jack, or
alternatively to apply ring ferrites onto the power supply cable (please see photo).
Warranty
We provide a two year warranty on factory defects of the HF analyser, the antenna and accessories.
Antenna
The antenna is made of a highly durable FR4 based material that
can easily withstand a fall from table height. The luminous diodes
at the antenna tip serve as additional proof of functionality, as
they signalise a continous contact of all antenna elements while
the meter is switched on. Any mechanical damage will cause either one or even both diodes to go out. The warranty will cover
any damages caused by falls, should this ever occur.
HF Analyser
The analyser itself is definitely not impact proof: Due to the comparatively heavy battery pack and the large number of delicate
components, damages caused by shock cannot be ruled out. Any
damage as a result of misuse or shock is therefore excluded from
this warranty.
Our silicone holsters have proven to be rather helpful for the protection of the meters.
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For questions or service contact the vendor of your instrument.
Manufacturer:
Gigahertz Solutions GmbH
Am Galgenberg 12
90579 Langenzenn
Germany
Telefon 09101 9093-0
Telefax 09101 9093-23
www.gigahertz-solutions.com / .fr / .de
info@gigahertz-solutions.de
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Conversion Table
( µW/m² to mV/m )
µW/m² mV/m µW/m² mV/m µW/m² mV/m
0,01 1,94 1,0 19,4 100 194
- - 1,2 21,3 120 213
- - 1,4 23,0 140 230
- - 1,6 24,6 160 246
- - 1,8 26,0 180 261
0,02 2,75 2,0 27,5 200 275
- - 2,5 30,7 250 307
0,03 3,36 3,0 33,6 300 336
- - 3,5 36,3 350 363
0,04 3,88 4,0 38,8 400 388
0,05 4,34 5,0 43,4 500 434
0,06 4,76 6,0 47,6 600 476
0,07 5,14 7,0 51,4 700 514
0,08 5,49 8,0 54,9 800 549
0,09 5,82 9,0 58,2 900 582
0,10 6,14 10,0 61,4 1000 614
0,12 6,73 12,0 67,3 1200 673
0,14 7,26 14,0 72,6 1400 726
0,16 7,77 16,0 77,7 1600 777
0,18 8,24 18,0 82,4 1800 824
0,20 8,68 20,0 86,8 2000 868
0,25 9,71 25,0 97,1 2500 971
0,30 10,6 30,0 106 3000 1063
0,35 11,5 35,0 115 3500 1149
0,40 12,3 40,0 123 4000 1228
0,50 13,7 50,0 137 5000 1373
0,60 15,0 60,0 150 6000 1504
0,70 16,2 70,0 162 7000 1624
0,80 17,4 80,0 174 8000 1737
0,90 18,4 90,0 184 9000 1842
DRU0197
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