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GB English
Declaration – electromagnetic immunity - continued
The 3M™ Littmann® Electronic Stethoscope Model 3200, is intended for use in the electromagnetic environment
specified below. The customer or the user of Model 3200 should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Compliance level
Electromagnetic environment –guidance
Portable and mobile RF communications equipment
should be used no closer to any part of the Model
3200, including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance:
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
Not applicable
d = 1,2
√
P
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m
80 MHz to 2.5 GHz
d = 1,2
√
P 80 MHz to 800 MHz
d = 2,3
√
P 800 MHz 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 Model 3200 is used exceeds the applicable RF
compliance level above, the Model 3200 should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the Model 3200.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
