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Guidance and Manufacturer’s Declaration - Electromagnetic Immunity
The NSI-III is intended for use in the electromagnetic environment specified below.
The customer or user of the NSI-III 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 NSI-III, 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
3Vrms
150kHz to 80MHz
10Vrms
ｄ＝
1.2√𝑃
150
ｋ
Hz to 80MHz
Radiated RF
IEC 61000-4-3
3V/m
80MHz to 2.5GHz
10V/m
ｄ＝
1.2√𝑃
80MHz to 800MHz
ｄ＝
2.3√𝑃
800MHz to 2.5GHz
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 80MHz and 800MHz, the higher frequency range applies.
NOTE 2: These guidelines may not apply in all situation. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a) Filed 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 NSI-III is used exceeds the applicable RF compliance level above, the NSI-III
should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the NSI-III.
b) Over the frequency range 150kHz to 80MHz, field strengths should be less than 3V/m.
