User's Manual

Guidance and manufacturer’s declaration – electromagnetic immunity
The SF-371 body fat scale is intended for use in the electromagnetic environment specified below. The customer
or the user of the SF-371 body fat scale 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 %.
Electrostatic
transient / burst
IEC 61000-4-4
± 2 kV for power
supply lines
± 1 kV for input/output
lines
N/A
Mains power quality should be that of
a
typical commercial or hospital
environment.
Surge
IEC 61000-4-5
± 1 kV differential
mode
± 2 kV common mode
N/A
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 sec
N/A
Mains power quality should be that of
a
typical commercial or hospital
environment. If the user of the
SF-371 body fat scale requires
continued operation during power
mains interruptions, it is
recommended that the SF-371 body
fat scale be powered from an
uninterruptible power supply or a
battery.
Power frequency
(50/60 Hz)
magnetic field
3 A/m
3 A/m
Power frequency magnetic fields
should be at levels characteristic of a
typical location in a typical
commercial or hospital environment.