25
Guidance and manufacturer’s declaration – electromagnetic immunity
The Laerdal Suction Unit (LSU) is intended for use in the electromagnetic environment specified
below. The customer or the user of the LSU should assure that it is used in such an environment.
Immunity test
IEC 60601-1-2
test level
Compliance
level
Electromagnetic environment - guidance
Conducted RF
IEC/EN 61000-4-6
Radiated RF
IEC/EN 61000-4-3
3 Vrms
150 kHz to 80
MHz
3 V/m
80 MHz to 2,5
GHz
3 Vrms
10 V/m
Portable and mobile RF communications
equipment should be used no closer to any
part of the LSU, including cables, than the
recommended separation distance
calculated from the equation applicable to
frequency of the transmitter.
Recommended separation distance
d=1.2 •
P
d=0.35•
P
80 MHz to 800 MHz
d=0.7•
P
800 MHz to 2,5 GHz
where
P
is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter manufacturer
and d is the recommended separation
distance in meters (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site
survey, a should be less than the compliance
level in each frequency range.b
Interference may occur in the vicinity of
equipment marked with the following
symbol:
NOTE 1. At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2. These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a.
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV
broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be considered.
If the measured field strength in the location in which the LSU is used exceeds the applicable
RF compliance level above, the LSU should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or
relocating the LSU.
b.
Over the frequency range 150 kHz to 80 MHz, field strength should be less than 3 V/m.
LSU DfU US 6791 rev H.indd 25
30.09.2016 14:39:53