KERN and SOHN MTA 400K-1M Notice D'utilisation page 67

Guidelines and manufacturer's declaration - electromagnetic noise immunity
The personal weighing scales MTA-M are designed for use in an electromagnetic environment that
meets the requirements stated below. The customer or user of the personal weighing scales MTA-M
must ensure that operation takes place in such an environment.
Noise immunity IEC 60601 test level
tests
Conducted HF 3
disturbance
150 kHz to 80 MHz
variables
acc to IEC 61000-4-
6
Emitted HF 3
disturbance
80 MHz to 2.5 GHz
variables
According to IEC
61000-4-3
NOTE 1 Higher frequency range applies to 80 MHz and 800 MHz.
NOTE 2 These guidelines may not be applicable in all cases.
The spread of electromagnetic variables is influenced by absorption and reflections in buildings,
objects and humans.
a
The field intensity of stationary radio transmitters such as base stations of wireless telephones and
mobile radio sets, amateur radio stations, AM and FM radio and television stations cannot be
reliably predicted in advance. To determine the electromagnetic environment in respect of
stationary transmitters, you should consider a study of electromagnetic phenomena at the location.
If the measured field intensity at the location where the personal weighing scale MTA-M is to be
used exceeds the conformity level above, you should observe the personal weighing scales MTA-
M in order to ensure normal operation. If you observe unusual features of performance you may
have to take additional measures such as a change in alignment or a different location for the
personal weighing scales MTA-M.
b
For a frequency range of 150 kHz to 80 MHz field intensity should be less than 3 V/m.
MTA-M-BA-e-1612
Conformity Electromagnetic environment -
guideline
3 V Do not use portable or mobile radio
sets nearer to the personal weighing
scales MTA-M or its wires than the
distance recommended as safety
distance which is calculated according
to the equation relevant for its
transmission frequency.
3 V/m
Recommended safety distance:
for 80 MHz to 800 MHz
for 800 MHz to 2.5 GHz
Use P as rated capacity of radio
transmitter in Watt (W) as per details
given by the radio transmitter
manufacturer and d as recommended
safety distance in metres (m).
The field intensity of stationary radio
transmitters should for all frequencies
be lower according to an in situ
examination than the conformity level.
Interference may occur near devices
bearing the symbol below.
a
b
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