Electro Magnetic Compatibility 93
When the Flowmaster system is exposed to electromagnetic (EM)
disturbances, the system may show abnormal behavior. For instance, the
measured traces may be become obscured, the software may crash or, in
case of very high level transient voltage events like for instance ESD, parts of
the system may even become defective.
Electromagnetic
environment ā guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80
MHz
6Vrms for ISM
bands
3 V/m
80 MHz to 2,7
GHz
27 V/m
385 MHz
28 V/m
450 MHz
9 V/m
710/745/780
MHz
28 V/m
810/870/930
MHz
28 V/m
1720/1845/1970
MHz
28 V/m
2450 MHz
9 V/m
5240/5500/5785
MHz
Portable and mobile RF
communications equipment
should be used no closer to
any part of the Flowmaster,
including cables, than the
recommended separation
distance calculated from the
equation applicable to the
frequency of the transmitter.
Recommended separation
distance
d = 0,58
80 MHz to 800
MHz
d = 1,75
800 MHz to 2,7
GHz
where P is the maximum
output power rating of the
transmitter in watts (W) in
accordance to the transmitter
manufacturer and d is the
recommended separation
distance in meters (m).
Field strengths from fixed RF
transmitters, as determined by
an electromagnetic site
survey,
a
should be less than
the compliance level in each
frequency range.
b
Interference may occur in
vicinity of equipment marked
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