KERN MPE-HM Betriebsanleitung Seite 78

Guidelines and manufacturer's declaration - electromagnetic noise immunity
The floor scales MPC/MPE is designed for use in an electromagnetic environment that meets the
requirements stated below. The customer or user of the medical electrical device must ensure that
operation takes place in such an environment.
Noise immunity tests IEC 60601 test
level
Conducted HF
3
disturbance variables
150 kHz to 80 MHz
as per IEC 61000-4-6
Emitted HF
3
disturbance variables
80 MHz to 2.5 GHz
as per 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 floor scales MPC/MPE is to be used exceeds the
conformity level above, you should observe the floor scales MPC/MPE 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 floor scale MPC/MPE.
b
For a frequency range of 150 kHz to 80 MHz field intensity should be less than 3 V/m.
20
Conformity Electromagnetic environment -
guideline
3 V Do not use portable or mobile radio sets
nearer to the floor scales MPC/MPE or
its wires than the distance
recommended as safety distance which
is calculated according to the equation
3 V/m relevant for its transmission frequency.
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.
MPC_M / MPE_HM / MPE_PM-BA-e-1414
a
b