nox A1 - Page 48

Nox A1 Manual
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Guidance and Manufacturer’s Declaration – Electromagnetic Immunity (Continued)
Guidance and manufacturer’s declaration – electromagnetic immunity
The Nox A1 recorder is intended for use in the electromagnetic environment specified below. The customer or
the user of the device 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 device, 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 V
rms
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
3V/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 Nox A1 recorder is used
exceeds the applicable RF compliance level above, the device should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the
device.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.