Interference Immunity - Schulte U-3003-E Gebrauchsanweisung

Other electrical / electronic equipment should not be operated in the immediate vicinity of the U-3003 or be
included in an equipment stack with the latter. If such an arrangement is unavoidable, this equipment should be
monitored for correct function. Because of the variety of equipment functions, the effects can vary considerably
and can be difficult to detect. Examples:
Equipment
Radio and TV equipment
Monitoring systems e.g.
b aby monitors
Cordless telephones
Radio thermometer
Radio weather stations
General electronic equipment
Guidelines and manufacturer's explanations - electromagnetic interference immunity
The U-3003 is intended for operation in the electromagnetic environment described below. The customer or user
of the U-3003 should ensure that it is used in this type of environment.
Interference
immunity
Electrostatic
discharge (ESD)
according to
IEC 61000-4-2
Rapid transient
electrical
disturbance / bursts
according to
IEC 61000-4-4
Impulse voltage
(Surges acc. to
IEC 61000-4-5
Voltage drops, short
power outages and
fluctuations of the
supply voltage
according to
IEC 61000-4-11
Magnetic fields with the
supply frequency
(50/60 Hz) according
to IEC 61000-4-8
Note: UT is the a.c. supply voltage before application of the test level
Guidelines for the avoidance, detection and rectification of
electromagnetic interference with other equipment
Malfunction
- Noise / crackling in the audio
- Horizontal lines in the picture
- Noise / crackling in the audio
- Interference with data
transmission, missing or erroneous
display
- Malfunction e.g. stop or change
from the intended mode
IEC 60601
Conformity level Electromagnetic
Test level
±8 kV contact ±8 kV contact
discharge discharge
±15 kV ±15 kV
air air
discharge discharge
±2kV ±2kV
for power cords for power cords
±1kV ±1kV
Normal modes Normal modes
voltages voltages
±2kV ±2kV
in-phase voltages in-phase voltages
70% UT for 10 ms 70% UT for 10 ms
40% UT for 100ms 40% UT for 100ms
0% UT for 100ms 0% UT for 100ms
0% UT for 5s 0% UT for 5s
30 A/m 30 A/m
page 21
Remedy
- Increase distance
- Change arrangement
- Change alignment
- Change reception channel
environment --
The floor should be wood or
concrete or provided with ceramic
tiles. If the floor is
provided with synthetic material,
the relative air humidity must be
at least 30%.
The quality of the supply voltage
should correspond to a typical
business or hospital environment.
The quality of the supply voltage
should correspond to a typical
business or hospital environment.
The quality of the supply voltage
should correspond to a typical
business or hospital environment.
If the user of the U-3003-E / S
requires it to continue in operation
also during interruptions to the
power supply, it is recommended
that the U-3003-E / S be supplied
from an uninterruptible power
supply or a battery.
Magnetic fields with the supply
frequency should correspond to,
typical values, as can be found in
a business or hospital environment.