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Directions for use
Electromagnetic immunity
The CP 50 electrocardiograph is intended for use in the electromagnetic environment specified below. The customer or
user of the CP 50 electrocardiograph should assure that it is used in such an environment.
Immunity test
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
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 CP 50 electrocardiograph is used exceeds the applicable RF compliance level above, the electrocardiograph
should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such
as reorienting or relocating the electrocardiograph.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
IEC 60601
Compliance
test level
level
3 Vrms
3 Vrms
150 kHz to 80 MHz
3 V/m
3 V/m
80 MHz to 2.5 GHz
EMC guidance and manufacturer's declarations
Electromagnetic environment - guidance
Portable and mobile RF communications equipment
should be used no closer to any part of the CP 50
electrocardiograph, including cables, than the
recommended separation distance calculated from
the equation applicable to the frequency of the
transmitter.
Recommended separation distance
d = (1.17)
P
d = (1.17)
P
80 MHz to 800 MHz
d = (2.33)
800 MHz to 2.5 GHz
P
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 metres (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,
should be less than the compliance level in each
b
frequency range.
Interference may occur in the vicinity of equipment
marked with the following symbol:
45
a
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