Mettler Electronics Corp. — Rev.I_09/23/19
24
Guidance and manufacturer’s declaration – electromagnetic immunity
The Sys*Stim 240 is intended for use in the electromagnetic environment specified below. The
customer or the user of the Sys*Stim 240 should assure that it is used in such an environment.
Immunity test
IEC 60601 test
level
Complianc
e 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 240, 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 240 is used exceeds the
applicable RF compliance level above, the Sys*Stim 240 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
240.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.