It isn't appropriate to refer to the ICNIRP publications. The correct
reference (for Europe) is to EN 50527-1 and EN 50527-2-1. Unfortunately,
these are not available free of charge. However, they are available at
reasonable prices (in English) at https://www.evs.ee/shop.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2018-07-06 09:52, Dürrer Bernd wrote:
Hello Andy,
Thank you for pointing out the ICNIRP limits: Actually, I recently had a
request concerning a service technician with a pacemaker and exposure to static
magnetic fields when handling permanent magnet rotors.
However, when I check ICNIRP resources, I do not find any publication to
justify higher limits. On the contrary, the “ICNIRP GUIDELINES ON LIMITS OF
EXPOSURE TO STATIC MAGNETIC FIELDS”
(https://www.icnirp.org/cms/upload/publications/ICNIRPstatgdl.pdf) contain the
statement:
“Electromagnetic interference from low-intensity static magnetic fields has been
observed to affect the operation of pacemakers, particularly those with magnetic
switches, and other types of medical electronic devices, including cardiac
defibrillators, hormone infusion pumps (e.g., for insulin), neuromuscular
stimulation devices (e.g., for the sphincter muscle of the bladder),
neurostimulators, and electronically operated prosthetic devices (e.g., for the
limbs and inner ear). In general, the operation of these devices is not adversely
affected by static magnetic fields below 0.5 mT."
The "ICNIRP GUIDELINES FOR LIMITING EXPOSURE TO TIME-VARYING ELECTRIC AND MAGNETIC
FIELDS (1 Hz TO 100 kHz)"
(https://www.icnirp.org/cms/upload/publications/ICNIRPLFgdl.pdf) contain the following
statement:
"Compliance with the present guidelines may not necessarily preclude interference
with, or effects on, medical devices such as metallic prostheses, cardiac pacemakers and
implanted defibrillators and cochlear implants. Interference with pacemakers may occur at
levels below the recommended reference levels. Advice on avoiding these problems is
beyond the scope of the present document but is available elsewhere (IEC 2005b)."
(IEC2005b refers to IEC 60601-1-2)
Kind regards,
Bernd
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