Electromagnetic emissions
Harmonic emissions
IEC 61000-3-2
voltage power supply network that supplies buildings used for domestic
purposes.
WARNING The Welch AllynCP 50™ and CP 50
Plus™ 12-lead resting electrocardiograph should not
be used adjacent to or stacked with other equipment
and that if adjacent or stacked use is necessary, the
Welch AllynCP 50™ and CP 50 Plus™ 12-lead resting
electrocardiograph should be observed to verify
normal operation in the configuration in which it will
be used.
Class A
Voltage fluctuations/
flicker emissions
IEC 61000-3-3
Complies
Electromagnetic immunity
The Welch AllynCP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph is intended for use in the electromagnetic
environment specified below. The customer or the user of the Welch AllynCP 50™ and CP 50 Plus™ 12-lead resting
electrocardiograph should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidance
Electrostatic discharge
(ESD)
IEC 61000-4-2
±6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be wood, concrete or ceramic
tile. If floors are covered with synthetic
material, the relative humidity should be at
least 30%.
Electrical fast
transient/burst
IEC 61000-4-4
±2 kV for power supply
lines
±1 kV for input/output
lines
±2 kV for power supply
lines
±1 kV for input/output
lines
Mains power quality should be that of a typical
commercial or hospital environment.
Surge
IEC 61000-4-5
± 1 kV line(s) to line(s)
± 2 kV line(s) to earth
± 1 kV line(s) to line(s)
± 2 kV line(s) to earth
Mains power quality should be that of a typical
commercial or hospital environment.
Voltage dips, short
interruptions and
voltage variations on
power supply input
lines
IEC 61000-4-11
<5 % U
T
(>95 % dip in
U
T
) for 0.5 cycle
40 % U
T
(60 % dip in
U
T
) for 5 cycles
70 % U
T
(30 % dip in
U
T
) for 25 cycles
<5 % U
T
(>95 % dip in
U
T
) for 5 s
<5 % U
T
(>95 % dip in
U
T
) for 0.5 cycle
40 % U
T
(60 % dip in
U
T
) for 5 cycles
70 % U
T
(30 % dip in
U
T
) for 25 cycles
<5 % U
T
(>95 % dip in
U
T
) for 5 s
Mains power quality should be that of a typical
commercial or hospital environment. If the user
of the Welch AllynCP 50™ and CP 50 Plus™ 12-
lead resting electrocardiograph requires
continued operation during power mains
interruptions, it is recommended that the
Welch AllynCP 50™ and CP 50 Plus™ 12-lead
resting electrocardiograph be powered from an
uninterruptible power supply or a battery.
Powerfrequency (50/60
Hz) magnetic field
IEC 61000-4-8
3 A/m 3 A/m Power frequency magnetic fields should be at
levels characteristic of a typical location in a
typical commerical or hospital environment.
Note
NOTE U
T
is the a.c. mains voltage prior to application of the test level.
48 Guidance and manufacturer’s declarations CP 50™ and CP 50 Plus™ 12-lead resting electrocardiograph
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