15.8 Computers, monitors and accessories
An ever increasing number of employees nowadays use a
PC at work. However, more then one out of two German
households today owns a PC. PCs (not as much the moni-
tors) create large amounts of EMFs. Particularly the CPU
and various expansion cards emit high doses of high-fre-
quency EMFs. Also, various PC accessories like monitors,
printers, scanners etc. emit
low-frequency
EMFs through
their mains cords. We recommend replacing these cables
and
possible power strips with our screened cables and
power strips to avoide EMFs. This is a quick and easy task
and provides a very good protection efficiency.
15.09 Microwave ovens
The “microwave”, loved by almost everyone, actually is
just a high-frequency transmitter with extremely high trans-
mitting power. While authoritative exposure limits for cell-
phones try to avoid warming up of tissue in the head, exac-
tly this effect is utilized in a microwave oven. The electro-
magnetic waves generated in the oven excite vibrations in
the water molecules. The energy from these vibrations in
turn causes warming up of food, etc. The transmitting
power used is so extremely high that food heats up in a
matter of only a few seconds. Microwave ovens use high
frequencies of about 2,45GHZ. A bit higher than UMTS,
but
one thousand times
as much power. These devices
are screened badly against the inside RF radiation The
“radiation leakage” is very well measurable at large
distances without problems using SPECTRAN.
The radiation load cau-
sed by the mains supply
is often as high as the
high-frequency load
from CPU or insert
cards. Because of this,
computers and auxiliary
equipment should be
operated with screened
cables (see Aaronia
price list and cable bro-
chure).
Microwave Ovens:
Although the appliances
are well shielded by
their steel housing the
residual-radiation emis-
sion can still be detected
by SPECTRAN even at
big distance.
15.0 RF exposure in practice
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