Gigahertz Solutions HF32D Mode D'emploi page 14

Made in Germany
Smart meters transmit data to the respective providers very ir-
regularly and in pulses, by using the locally available cell phone
services. Additionally there may be pulsed in-house wireless con-
nections. Therefore, it makes sense to keep measuring until you
pick up some pulses, and if necessary, apply correction factors.
Limiting values, recommendations and
precautions
The "Standard der baubiologischen Messtechnik" (Standard for
Building Biology Measurements), SBM 2008, classifies measure-
ments (per radio communication service), with a note of caution
"pulsed signals to be taken more seriously than continuous ones",
as follows:
Building Biology Recommendations as per SBM-2008
Peak
un- moderately very extremely
meas-
conspicuous conspicuous conspicuous
conspicuous
urements
< 0.1 0.1 - 10 10 - 1000 > 1000
µW/m²
© Baubiologie Maes / IBN
In fall 2008 the "Bund für Umwelt und Naturschutz Deutschland
e.V." (BUND) (environmental NGO) recommended a limiting value
of 1 µW/m² even for outdoor situations.
The Landessanitätsdirektion Salzburg (Austrian health authority)
proposed already in 2002 to lower the present "Salzburger
Vorsorgewert" (precautionary value) to 1 µW/m² for indoor situ-
ations.
Limiting values imposed by governments are mostly considerably
higher. There are indications of rethinking, though. The internet
provides large collections of recommendations and data.
Note for users of cellular phones and WLAN: Even below the
measurement range of the meters, even the highly sensitive
HF38B, a reliable communication is absolutely possible.
Identification of the sources of pollution
After determination of the total exposure the next step is to find
out where the radiation enters the examined room. As a first step
eliminate sources from within the same room (e.g. cordless
phones, wireless routers, etc.) Once this is completed, the re-
maining radiation will originate from outside. For remedial shield-
ing it is important to identify those areas of all walls (including
doors, windows and window frames!), of ceiling and floor, which
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