Notes on electromagnetic interference immunity
49
Overvoltage
IEC 61000-4-5
± 1 kV
Differential
mode
± 1 kV
Differential mode
The quality of the mains power
supply should be equivalent to
a typical commercial or hospital
environment.
Voltage drops, short
interruptions and fluc-
tuations in voltage of
the supply voltage feed
lines in accordance with
IEC 61000-4-11
< 5 % UT (> 95 %
drop of UT) for
0.5 cycles 40 %
UT (60 % drop of
UT) for 5 cycles
70 % UT (30 %
drop of UT) for 25
cycles < 5 % UT
(> 95 % drop of
UT) for 5 s
< 5 % UT (> 95 % drop of
UT) for 0.5 cycles
< 40 % UT (60 % drop of
UT) for 5 cycles
< 70 % UT (30 % drop of
UT) for 25 cycles
< 5 % UT (> 95 % drop of
UT) for 5 s
The quality of the mains power
supply should be equivalent to
a typical commercial or hospital
environment. If the user of the
wrist blood pressure monitor
BDH 612 wishes to continue op-
eration during interruptions to
the mains power supply, it is rec-
ommended to connect the wrist
blood pressure monitor BDH 612
to an interruption-free power
supply or battery.
