Mettler Electronics Corp.—
Rev.F_09/13/17
16
Guidance and manufacturer’s declaration – electromagnetic immunity
The Sys*Stim 294 is intended for use in the electromagnetic environment specified below. The customer or
the user of the Sys*Stim 294 should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Compliance
level
Electromagnetic environment – guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80 GHz
3 V/m
80 MHz to 2,5 GHz
3 V
3 V/m
Portable and mobile RF communications
equipment should be used no closer to any part
of the Sys*Stim 294, including cables, than the
recommended separation distance calculated
from the equation applicable to the frequency of
the transmitter.
Recommended separation distance
d
= 1,2
√
P
d
= 1,2
√
P
80MHz to 800 MHz
d
= 2,3
√
P
800MHz to 2,5 GHz
where
P
is the maximum output power rating of
the transmitter in watts (W) according 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 the vicinity of
equipment marked with the following symbol:
NOTE 1
At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2
These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and
land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted
theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in the location in which
the Sys*Stim 294 is used exceeds the applicable RF compliance level above, the Sys*Stim 294 should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the Sys*Stim 294.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
