M4735A Service Manual 7-19
Electromagnetic Compatibility
7
Electromagnetic Compatibility
When using the M4735A HeartStart XL Defibrillator/Monitor, electromag-
netic compatibility with surrounding devices should be assessed.
A medical device can either generate or receive electromagnetic interference.
Testing for electromagnetic compatibility EMC with and without the appro-
priate accessories has been performed according to the international standard
for EMC for medical devices (IEC 60601-1-2). This IEC standard has been
adopted in Europe as the European Norm (EN 60601-1-2).
The EMC standards describe tests for both emitted and received interference.
Emission tests deal with interference generated by the device being tested.
WAR NI NG Radio frequency (RF) interference from nearby transmitting devices may degrade
performance of the M4735A HeartStart XL Defibrillator/Monitor. Electromagnetic
compatibility with surrounding devices should be assessed prior to using the
defibrillator.
Reducing Electromagnetic Interference
The M4735A HeartStart XL Defibrillator/Monitor and associated accessories
are susceptible to interference from other RF energy sources and continuous,
repetitive, power line bursts. Examples of other sources of RF interference are
medical devices, cellular products, information technology equipment and
radio/television transmission. Should interference be encountered, as demon-
strated by artifact on the ECG or dramatic variations in SpO
2
values, attempt
to locate the source. Assess:
z Is the interference intermittent or constant?
z Does the interference occur only in certain locations?
z Does the interference occur only when in close proximity to certain
medical devices?
z Does the SpO
2
value change dramatically when the AC line cord is
unplugged?
Once the source is located, attempt to attenuate the EMC coupling path by
distancing the defibrillator from the source as much as possible. If assistance
is needed, call your local service representative.
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