Please read the following manual carefully before using your ...

14.0 Exposure limits
14.1 Limits for personal safety
There are internationally recognized limits for power wires and the appliances
connected to them, as well as various precautionary limits and recommendations.
Depending on country, professional sector or the various interest groups,
however, they can differ greatly among each other.
The german exposure limits are dictated by the Regulierungsbehörde für
Telekommunikation und Post (Reg TP, roughly: regulating body for telecommunications
and post), which is a subsidiary of the Bundesministerium für
Wirtschaft und Arbeit (BMWA, roughly: ministry of commerce and labour). Most
national and international bodies recognize these recommendations. They are
part of the German “26. BimSchV“ (ordinance for electromagnetic fields) and follow
the international ICNIRP recommendation.
The german exposure limits are intended for quadratic means of measurements
taken during intervals of 6 minutes and subdivided by frequency ranges.
Furthermore, there are seperate limits depending on the group of persons affected.
As an example, we will use the limit for the “generic population“:
Frequency E-field [V/m] H-field [µT] M-field [A/m]
Below 1 Hz - 40.000 32.000
1-8 Hz 10.000 40.000 / f 32.000 / f²
8-25 Hz 10.000 5.000 / f 4.000 / f
0,025-0,8 kHz 250 / f 5 / f 4 / f
0,8-3 kHz 250 / f 6,25 5
3-150 kHz 87 6,25 5
0,15-1 MHz 87 0,92 / f 0,73 / f
1-10 MHz 87 / f 0,92 / f 0,73 / f
10-400 MHz 27,5 0,092 0,073
The chart on the left graphically
represents, among others, the
aforementioned formulas for H
fields over a frequency range
from 0Hz to 400MHz. The curve
clearly indicates that the widely
used, cheap broadband
testers CANNOT determine
these exposure limits properly
as they do not take signal frequency
into account.
Firmware BETA50 / © 2005-2009 by Aaronia AG, DE-54597 Euscheid, www.aaronia.de 47