Soehnle Professional 7752 Instrucciones De Uso página 48

8. Notes on electromagnetic compatibility
Guidelines and manufacturer's declaration - electromagnetic immunity
The scale of type series 7752 is intended for operation in the ELECTROMAGNETIC ENVIRONMENT indicated below.
The customer or the user of the 7752 scales should ensure that it is used in such an environment.
Immunity test
Conducted RF interfe-
rence according to IEC
61000-4-6
Conducted RF interfe-
rence according to IEC
61000-4-3
NOTE 1: At 26 MHz and 800 MHz the higher frequency range applies
NOTE 2: These guidelines may not be applicable in all cases. The propagation of electromagnetic quantities is influenced by
absorption and reflections of buildings, objects and people.
a) The field strength of stationary transmitters, e.g. base stations of radio telephones and mobile land radios, amateur radio stations,
AM and FM radio and television transmitters cannot theoretically be precisely predicted. To determine the electromagnetic environ-
ment with respect to the stationary transmitters, a study of the location should be considered. If the measured field strength at the
location where the instrument is used exceeds the above compliance levels, the instrument should be observed to demonstrate its in-
tended function. If unusual performance characteristics are observed, additional measures may be necessary, e.g. a change or another
location of the device.
b) Over the frequency range 150 kHz to 80 MHz the field strength should be less than 3 V/m.
48
IEC 60601 test level Compliance level
3 Veff 10 Veff
150 kHz to 80 MHz 150 kHz to 80 MHz
3 V/m 10V/m
80 MHz to 2,5 GHz 26 MHz to 2,7 GHz
Electromagnetic environment -
guidelines
Portable and mobile radios shall be
used at no distance from the scale
7752, including the lines, less than the
recommended protective distance,
calculated according to the equation
suitable for the transmitting frequency.
Recommended protective distance:
d = 0,4 √P
d = 0,4 √P
for 80 MHz to 800 MHz
d = 0,7 √P
for 800 MHz to 2,7 GHz
with P as the rated power of the
transmitter in watts (W) as specified by
the transmitter manufacturer and d as
the recommended protective distance
in meters (m).
The field strength of stationary radio
transmitters is lower than the matching
level at all frequencies according to an
on-site investigation.
Interference may occur in the vicinity of
devices bearing the following symbol.