Stryker SERFAS, Operation And Maintenance Manual

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Guidance and Manufacturer's Declaration: Electromagnetic Immunity
SERFAS Energy Systemis intended for use in the electromagnetic environment specified below. The customer or
the user of SERFAS Energy Systemshould ensure that it is used in such an environment.
Immunity Test IEC 60601 Test Level
Compliance
Level
Electromagnetic Environment: Guidance
Portable and mobile RF
communications equipment should be
used no closer to any part of the SERFAS
Energy Systemsystem, including its
cables, than the recommended
separation distance calculated from the
equation applicable to the frequency of
the transmitter.
Conducted RF
IEC 61000-4-6 3 Vrms
150 kHz to 80 MHz
3 V Recommended Separation Distance
Radiated RF
IEC 61000-4-3 3 V/m
80MHz to 2.5 GHz 3 V/m
80 MHz to 800 MHz
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 SERFAS Energy
Systemsystem is used exceeds the applicable RF compliance level above, the SERFAS Energy Systemsystem should
be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the SERFAS Energy Systemunit.
(b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
d 1.17 P =
d 1.17 P =
d 2.33 P =