14.3 “Construction-biological limits” & “Precautionary limits”
The
countless
“construction-biological limits“ are vastly different from the offici-
al limits for personal safety - they are mostly
significantly
lower. To one’s great
surprise, however, they often do not have
any
“frequency component“ (in con-
trast to the highly complex official ICNIRP limits, which are also legally binding
in Germany). In other words, they are completely
identical
, for instance, at
16.7Hz (traction power) as well as 50Hz (mains).
Hence, technicians in professional measurement technology are astounded at
this rather “strange“ way to evaluate exposure limits, predominantly used by
construction biologists. However, there is a simple explanation for this relatively
simple way of evaluating exposure limits:
The “measurement equipment“ used in this sector is predominantly based on the
so-called “broadband/diode detector“ technology. However, it is physically
impossible
to conduct
frequency-selective
measurements with these devices.
Hence,
frequency-selective
construction-biological limits would simply not be
manageable. In any case, this might change very soon thanks to SPECTRAN,
as frequency should really not be swept under the carpet.
Even if supporting such trivial “precautionary limits“ in a real measurement devi-
ce, such as SPECTRAN, does bother us intensely, we decided to support at
least the ECOLOG-institute and BUND “precautionary limits“.
The following limits
can all be called up in “Exposure limits“ mode by using
the right/left cursor keys - they will be displayed instantly
:
ECOLOG
= ECOLOG institute precautionary limit*
0,1µT or 20V/m
BUND
= BUND precautionary limit for relaxation areas
0,01µT or 0,5V/m
Please note that these values could change at any time. Thus, please consult
the respective entities when in doubt.
*Only applicable to 50Hz
14.0 Exposure limits
Firmware V 1.0 / © 2005-2013 by Aaronia AG, D-54597 Euscheid, www.aaronia.com
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