REFA FAMILY USER MANUAL
Page
22
of
27
Guidance and manufacturer’s declaration - electromagnetic immunity
The Refa is intended for use in the electromagnetic environment specified below. The customer or the user of the Refa should
assure that it is used in such an environment.
Immunity test
IEC 60601 test
level
Compliance
level
Electromagnetic environment - guidance
Power frequency (50/60 Hz)
magnetic field IEC 61000-4-
8
3 A/m
3 A/m
Power frequency magnetic fields should be at levels
characteristic of a typical location in a typical
commercial or professional environment.
NOTE U
T
is the a.c. mains voltage prior to application of the test level.
Guidance and manufacturer’s declaration – electromagnetic immunity
The Refa is intended for use in the electromagnetic environment specified below. The customer or the user of the Refa should
assure 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 Refa, including cables, than the
recommended separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance:
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to
80 MHz
3 V
𝑑 = 1.2√𝑃
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to
2.5 GHz
3 V/m
𝑑 = 1.2√𝑃
80 MHz to 800 MHz
𝑑 = 2.3√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 Refa is used exceeds the applicable RF compliance
level above, the Refa should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the Refa.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
