At EMC-Test NRW GmbH (Dortmund, 23/11/2004) and EMCC Dr. Rasek
(Ebermannstadt, 16/02/2005) – both accredited EMI testing
labs – the shielding effectivity of Cuprotect®Spezial
was tested under practice conditions including the comparison of
the effects of different connection techniques for the individual
Cuprotect® sheets.
A double-layer of Cuprotect®Spezial met the high
US-standard MIL-STD-188-125, part 1+2. This high aim was
exceeded several times under different basic conditions during
the tests.
The high testing requirements of the US military standard MIL-STD-188-125, part 1 and 2, were accomplished by using two layers of Cuprotect®Spezial.
More than 30 measurements of the shielding effectivity of double-layered Cuprotect®Spezial were taken with differing construction surfaces and details, achieving at least 80 dB shielding attenuation in the frequency range of 1 MHz to 3 GHz.
In addition, expert Prof. Dipl.-Ing. P. Pauli from Universität
der Bundeswehr, Munich, verified the excellent shielding properties
of Cuprotect®, Cuprotect®Spezial and Cuprotect®A1.
According to normal practice conditions an area of 4 single sheets
of Cuprotect®, Cuprotect®Spezial and Cuprotect®A1 respectively
was pieced together. Subsequently, its shielding attenuation within
different embedding materials (plaster, bitumen thick coating,
hot bitumen, lime mortar, cement mortar) was measured:
Cuprotect® products for all areas of use (timber frame, plaster
etc.):


Cuprotect®A1 for roofs and timber
frame construction:

Legende: |
Frequency Range: |
Long & Medium Frequencies
High Frequencies
Radio Services
UKW radio stations
VHF TV-stations, T-DAB (digital radio)
Paging services
UHF & digital TV-stations
GSM 900 mobile communication
Radar for air traffic control
GSM 1800 mobile communication
DECT indoor telephones
UMTS mobile communication
WLAN / Bluetooth
Radar, airport radar
WLL
Hyper-LAN
Weather radar
Radar
Radar
|
100kHz - 1,5 MHz
3- 26 MHz
40 - 80 MHz
86 - 108 MHz
174 - 223 MHz
465 MHz
470 - 840 MHz
935 - 960 MHz
1.240 - 1.400 MHz
1.820 - 1.875 MHz
1.880 - 1.900 MHz
2.110 - 2.170 MHz
2.400 - 2.484 MHz
2.700 - 3.400 MHz
3.500 Mhz
5.150 - 5.255 MHz
5.600 and 9.400 MHz
8.500 - 10.500 MHz
17.000 - 18.000 MHz
|
Frequency Range: |
Cuprotect® |
Shielding Attenuation Factor* |
100
kHz to 3 GHz |
up
to
100 dB |
up
to
100.000 |
3
GHz to 10 GHz |
up
to
40 dB |
up
to
10.000 |
10
GHz to 18 GHz |
up
to27
dB |
up
to 500 |
Frequency Range: |
Cuprotect®Spezial |
Shielding Attenuation Factor* |
100
kHz
to 3 GHz |
up
to 120
dB |
up
to 1,000,000,000 |
3 GHz
to 10 GHz |
up
to 48
dB |
up
to 158,500 |
10
GHz to 18 GHz |
up
to 40
dB |
up
to 10,000 |
Frequency Range: |
Cuprotect®Spezial
double layer |
Shielding Attenuation Factor* |
100
kHz to 3 GHz |
up
to 145 dB |
up
to 1,000,000,000,000 |
Frequency Range: |
Cuprotect®A1 |
Shielding Attenuation Factor* |
10
MHz to 3 GHz |
up
to 110
dB |
up
to 1,000,000,000 |
3 GHz
to 6 GHz |
up
to 58
dB |
up
to 1,000,000 |
|
|
(*
means by which factor the shielding effectivity improved
comparing to the initial condition |
Practice example:
A
shielding effectivity of 30 dB reduces the electromagnetic flux
density by a factor of 1,000. If the measured value lies around
10,000 µW/m², a shielding material with a shielding effectivity
of 30 dB reduces the electromagnetic radiation on the back side
of the shielding to a building-biologically acceptable value
of 10 µW/m².
Conclusion:
Choosing Cuprotect® for your shielding measures guarantees
a factor of 1,000 for the attenuation of electromagnetic
waves under practice conditions, provided that other elements
such as windows and doors are integrated into the shielding
concept designed by a shielding expert.
At EMC-Test NRW GmbH (Dortmund, 23/11/2004) and EMCC Dr.
Rasek (Ebermannstadt, 16/02/2005) – both accredited
EMI testing labs – the shielding effectivity of Cuprotect®Spezial
was tested under practice conditions including the comparison
of the effects of different connection techniques for the
individual Cuprotect® sheets.
A double-layer of Cuprotect®Spezial met the high US-standard
MIL-STD-188-125. In addition, expert Prof. Dipl.-Ing. P.
Pauli from Universität der Bundeswehr, Munich, verified
the excellent shielding properties of Cuprotect®, Cuprotect®Spezial
and Cuprotect®A1:
Review Cuprotect®:
"Our
tests showed that Cuprotect® is outstandingly suitable
for shielding electromagnetic waves – particularly
within the interesting frequency ranges of mobile communication."
Review Cuprotect®Spezial:
"Our
tests showed that Cuprotect®Spezial is outstandingly
suitable for shielding electromagnetic waves of any polarisation
within the whole UHF frequency range and up to 18 GHz."
Review Cuprotect®A1
"The
measurements give evidence that Cuprotect®A1 has an excellent
shielding effectivity for shielding electromagnetic waves
of any polarisation within the whole examined frequency range."
(Prof.
Dipl. Ing. Pauli, reports from 03/07/2002, 24/01/2003,
14/01/2005) |

EUROPAEM EMF Guideline 2016 for the prevention, diagnosis and treatment of EMF-related health problems and illnesses
Precautionary guidance values for selected RF sources
In areas where people spend extended periods of time ( > 4 h per day), minimize exposure to radio-frequency radiation to levels as low as possible or below the precautionary guidance
values specified below. Frequencies to be measured should be adapted to each individual case. The specific guidance values take the signal characteristics of risetime
(ΔT) and periodic ELF “pulsing” into account (258). Note:
Rectangular signals show short risetimes and consist of a broad spectrum of frequencies. The current density induced in the human body increases with increasing frequency in an approximately linear relationship (266).s.
>> Download of the full Guideline / 2016
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