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Guidance and manufacturer’s declaration – electromagnetic immunity
Immunity test IEC 60601
test level
Compliance
level Electromagnetic environment
– guidance
Conducted RF
IEC 61000-4-6 3 Vrms
150 kHz
to 80 MHz
3 V
150 kHz to
80 MHz
Portable and mobile RF communications
equipment should be used no closer to any
part of the The Emfit Tonic-Clonic Seizure
Monitor, including cables, than the
recommended separation distance calculated
from the equation applicable to the frequency
of the transmitter.
Recommended separation distance:
Radiated RF
IEC 61000-4-3 3 V/m 80
MHz to
2,5 GHz 3 V/m
80 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 metres
(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
[EQUIPMENT or SYSTEM] is used exceeds the applicable RF compliance level above,
the [EQUIPMENT or SYSTEM] should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the [EQUIPMENT or SYSTEM].
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than
3 V/m.