55
Guidelines and manufacturer‘s declaration - electromagnetic immunity
The 7835 series scale is designed for operation in the ELECTRICAL MAGNETIC ENVIRONMENT specified below. The
customer or the user of the 7835 scale should ensure that it is used in such an environment.
Interference immunity
test
IEC 60601 test level Compliance level
Electromagnetic environment -
Guidelines
Conducted HF disturban-
ce variables
according to IEC 61000-
4-6
Radiated HF disturbance
variables to IEC 61000-
4-3
3 Veff
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
10 Veff
150 kHz to 80 MHz
10V/m
26 MHz to 2,7 GHz
Portable and mobile radios are used at
no less distance from the 7835 scale,
including cables, than the
recommended separation distance
calculated according to the equation
appropriate to the transmission
frequency.
Recommended safety 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
where P is the rated power of the
transmitter in watts (W) as specified by
the transmitter manufacturer and d is
the recommended safety distance in
metres (m).
The field strength of stationary radio
transmitters is lower than the
compliance level at all frequencies
according to an on-site study.
Interference may occur in the vicinity of
equipment that bears the following
symbol.
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
Sizes are influenced by absorptions and reflections of buildings, objects and people
a) The field strength of stationary transmitters, such as base stations of radio telephones and mobile land radios, amateur radio sta
-
tions, AM and FM radio and television transmitters cannot be predicted theoretically with any accuracy. To determine the electromag-
netic environment with regard to stationary transmitters, a study of the site should be considered. If the measured field strength at the
site where the equipment is used exceeds the above compliance level, the equipment should be observed to verify that it is functioning
as intended. If unusual performance characteristics are observed, additional measures may be necessary, such as changing or reloca-
ting the equipment.
b) Over the frequency range from 150 kHz to 80 MHz, the field strength should be less than 3 V/m.
NO
TES
ON
ELEC
TROM
AGNE
TIC
COMP
ATIBILI
TY
12
12. Notes on electromagnetic compatibility
Summary of Contents for 7835.01.001
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