51
Voltage dips, brief
interruptions and
fluctuations in the
supply voltage
According to
IEC 61000-4-11
‹
5% U
T
for 1/2 cycle
(
›
95% drop)
40% U
T
for 5 periods
(60% drop)
70% U
T
for 25 periods
(30% drop)
‹
5% U
T
for 5 s
(
›
95% drop)
Same as the
test level
The quality of the supply voltage should correspond to
that in a typical business and/or hospital.
The CardioMessenger is powered by a battery. An inter-
ruption in the supply voltage to the power supply unit will
not impair the functioning of the CardioMessenger.
Magnetic field at the
supply frequencies
(50/60 Hz)
According to
IEC 61000-4-8
3A/m
Same as the
test level
The magnetic field strength should correspond to the
typical value in business and hospital environments.
Comment: U
T
is the mains alternating voltage before applying the test levels.
Checking
immunity to noise
Test level according to
IEC 60601-1-2
Conformance level
Guidelines for the electromagnetic environment
CardioMessenger.book Page 51 Monday, March 4, 2013 6:07 PM