File No.: QR-HC21-C-C09
Xiamen Linktop Technology Co., Ltd.
Page 14 of 17
are covered with
synthetic material,
the relative humidity
should be at least
30%.
Electrostatic transient
/ burst
IEC 61000-4-4
±2kV for power
supply lines
±1kV for input/output
lines
Not applicable
(Battery operated
device)
Mains power quality
should be that of a
typical commercial or
hospital environment.
Surge
IEC 61000-4-5
±1kV differential
mode
±2kV common mode
Not applicable
(Battery operated
device)
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% UT
(>95% dip in UT)
for 0.5 cycle
40% UT
(60% dip in UT)
for 5 cycles
70% UT
(30% dip in UT)
for 25 cycles
<5% UT
(>95% d i p in UT)
for 5 sec
Not applicable
(Battery operated
device)
Mains power quality
should be that of a
typical commercial or
hospital environment.
If the user of the
Electronic
Stethoscope requires
continued operation
during power mains
interruptions, it is
recommended that
the Electronic
Stethoscope be
powered from an
uninterruptible power
supply or a battery.
Power frequency
(50/60 Hz) magnetic
field
IEC 61000-4-8
30 A/m
30 A/m
Power frequency
magnetic fields
should be at levels
characteristic of a
typical location in a
typical commercial or
hospital environment.
NOTE
U
T
is the a.c. mains voltage prior to application of the test level.
Manufacturer’s declaration – electromagnetic
The Electronic Stethoscope is intended for use in the electromagnetic environment specified
below. The customer or the user of the Electronic Stethoscope should assure that it is used in
such an environment.
Immunity test
IEC 60601
test level
Compliance
level
Electromagnetic environment - guidance