97
Guidance and manufacturer’s declaration-electroma
netic immunit
The TU101 is intended for use in the Electromagnetic environment specified below.
The customer or the user of the TU101 should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level
Electromagnetic
environment-
uidance
Conducted RF
IEC 61000-4-6
3Vrms (c)
150KHz to 80MHz
outside ISM bands
Portable and mobile RF
communications equipment should be
used no closer to any part of the
TU101, including cables, than the
recommend- ed separation distance
calculated from the equation applicable
to the frequen- cy of the transmitter.
Recommended separation distance
d = 1.17 ×√ P
d = 1.17 ×√ P 80MHz to 800MHz d =
2.33 ×√ P 800MHz to 2.7GHz
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
metre(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
3Vrms
150KHz to 80MHz
Radiated RF
IEC 61000-4-3
6Vrms (c)
150kHz to 80MHz
inside ISM bands
3V/m
80MHz to 2.7GHz
3V/m
80MHz to 2.7GHz
NOTE 1: At 80MHz 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 mobile radio, 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 TU101 is used exceeds the applicable RF compliance level above, the TU101 should be
observed to verify normal operation. If abnormal performance is observed, additional measures may
be necessary. Such as reorienting or relocating the TU101.
(b) Over the frequency range 150KHz to 80MHz. field strengths should be less than 3V/m.
(c) The ISM(industrial, scientific and medical) bands between 150kHz and 80MHz are 6.765MHz to
6.795MHz; 13.533MHz to 13567MHz; 26.957MHz to 27.283MHz; and 40.66MHz to 40.7MHz.
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