Download User Manual - EMF Detector

The European Comunity provided gerteral guidelines in its Council Reconunendation of
July 1999.t ICNIRP published similar guidelines in April 199E.'zTabl€ I giv€s a sampling
of the international and national lield-strength limit values for the general public and
continuous exposure
950Mhz
lntemational
EDl5SA
can be used to monitor the RF radiation level for safety purpose. Mmy 2.4GHz band
applications have high RF transmit power. For WiFi WLAN the maximum trmsmitter power output is
100mw which is 20dBm. For several WiFi device operated at the same time in the same lmation area it is
possible that the RF radiation level will exceed the maximum safety level standrd. The WiFi AccessPoint lmation is importmt since it is busy most of the time and transmits a lot of RF power. Try to move
the Access-Point to the location that is far from where the people stay most of the time. The 2.4 GHz
DECT cordless phone base mit is also could be a problem. DECT phone base unit will poll all the satellite
units (hand set) all the tim€ to make sure it can communicate to each other. It will transmit RF signal all
the time. Therefore Do Not places the DECT cordless phone base unit on the night stild next to your
bed! EDI5SA can be used to measure the RF radiation level for each frequency radiated from the device
in the 2.4GHz band. Or broadbmd in 100MHz to 3GHz mnge. Microwave oven leakage can be
monitoredtoo. Table.lshowstheconversiontableforpowerlevel(dBm)measuredbyEDISSAtopower
density level (w/m2) which is used for maximum radiation safety standard. The Three RED color area is
the National safety standrd used by three different country. Try not to exceed these radiation levels if
possible. @elocate the device, use shielding, etc.,)
Field streneth,/Dower densitv table:
RED3
5
dBm up
Safetyreg€#3 Italystand{d (o.lvm-sq)
O.l8 w,tn2
RED2
-10 dBm
0.058
w/m'
Safety
rmg€#2
Swiss
REDI
-15 dBm
0.01E w/m2
Safety
rege#l
Russian
YELLOW3
-20 dBm
O.fi)58
YELLOW2
-25 dBm
1.8
YELLOWI
-30 dBm
O.5E
mdm2
GREEN3
-35
dBn
0. I 8
mdmz
WLeless I-AN, WiFi typically in this rangc
GREEN2
-40 dBm
0.06
mdm'
So@ sigdl source
doM
stsded (0.04ilm-sq)
smdnd (0.02vcsq)
dm2
I
Crution
I
t999t5t9rE0 :'].;:ii
kltemational
IO,MRP Guidelines;,:April 1 998
Austria
oNoRM
S1120
42vt^
59:Y/m,, :,''
.
(4:7Jwm?)
(4.xw;5
42Ylm
59-V/m ".'
,
14,75w/m?)
49 Vlm
f6 1qw/m2\
21,:V1,m
::
Belgium----
Belgisphr Staatsblad F,2001;;1365
{t:lswi#)
Gliinsny
26. Dcutsche Veiol{nung
*r4
Italy
Decreto n; 381; 1998
Ihe
14r?sw/m?l
o, Ylm'
(0;lw/#)
Nbtherlands
Y/m
iA,3tW7di
(g
l
25Wm')
6 iV,/m
20 V/m
riw#r
zl V/m:
6.til/lm
V.eidrdnwg 1999
United States
IEEE C95JT
rr
China
Draft: Natimal Quality Technology
*v v/m
'
io,naw-h
49 Vr/rn
iaw;,t
(631Wtm',).
Radio-Radiation:P,rotectibn
49 Vftn
Guidelines,1990:,
ioraiw*?1
:
30 v1m
E3iV/m
(f 8w/rn?)
Switrerlmd
Japan
^
(10W1m1
(6.92w/m?)
51
Monilorins Bureau
61 V/m
(O;lwlm'l
20Ylm
HalthComcil
(9'25W'm'z)
5gVfin
,vlgt
(1w/m?l
Caulion!
Caution
Courtcil RCco;q1,4.e4*ation
l850Mhz
(0,1Wm2)
68 VTrn
nt.w/ft2l
9l v/m
liOW;m?t
6lvlm
(Iowlml)
safe
milmz
arcud
safe
A sampling of international and national field-strength limits for mobile comunications
safe
frequencies.
sfe
safe
power
Note:
* Electromagnetic wave field strength/power density decades very fast with distance (distance squre),
keep a gmd distmce from the high frequency RF signal source can reduce the high frequency radiation
effect. Relocate the radiation source ifpossible, Alumina foil or window sun reflector film (silver color)
cm be used as an effective and cheap shielding material for most of RF radiations.
* The power density table is for RF radiation evaluation and reference only. Official RF safety radiation
measurement procedure is complicate and should be handled by trained technical person with lab
instruments. Safety range standard are listed here as a reference only. ED15SA is not a medical
instrument, Please do not use it in medical, legal or other related applications.
p2007 CORNET Miqosystero lnc., 1400 Coleman Ave #C28 Santa Clara, CA 95050 USA Tel: (408)9690205 M.@rn6tmicro.@m
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