Guidance and MANUFACTURER’S declaration –
electromagnetic IMMUNITY
Immunity test
Guidance and manufacturer’s declaration – electromagnetic immunity
The TT-CL016 is intended for use in the electromagnetic environment
specified below. The customer or the user of the TT-CL016 should assure
that it is used in such an environment.
IEC 60601 test level Compliance level
3 Vrms
150 kHz to 80 MHz
6 Vrms 150 kHz to 80 MHz
outside ISM bandsa
10 V/m
Electromagnetic environment - guidance
3 Vrms
150 kHz to 80 MHz
6 Vrms 150 kHz to 80 MHz
outside ISM bandsa
10 V/m
80 MHz to 2.7 GHz
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
Portable and mobile RF communications equipment should be used no closer to
any part of the Models TT-CL016, including cables, than the recommended
separation distance calculated from the equation applicable to the frequency of
the transmitter.
Recommended separation distance
P
E
d
=
1
5.3
P
E
d
=
7
P
V
d
=
1
5.3
80MHz to 800MHz
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 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.
frequency ranges.
c. 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 TT-CL016 is used exceeds
the applicable RF compliance level above, the TT-CL016 should be observed to
verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the TT-CL016.
d. Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3 V/m.
a. The ISM (industrial, scientific and medical) bands between 0,15 MHz and 80
MHz are 6,765 MHz to 6,795 MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz to
27,283 MHz; and 40,66 MHz to 40,70 MHz. The amateur radio bands between
0,15 MHz and 80 MHz are 1,8 MHz to 2,0 MHz, 3,5 MHz to 4,0 MHz, 5,3 MHz
to 5,4 MHz, 7 MHz to 7,3 MHz, 10,1 MHz to 10,15 MHz, 14 MHz to 14,2 MHz,
18,07 MHz to 18,17 MHz, 21,0 MHz to 21,4 MHz, 24,89 MHz to 24,99 MHz, 28,0
MHz to 29,7 MHz and 50,0 MHz to 54,0 MHz.
b. The compliance levels in the ISM frequency bands between 150 kHz and 80
MHz and in the frequency range 80 MHz to 2,7 GHz are intended to decrease the
likelihood that mobile/portable communications equipment could cause
interference if it is inadvertently brought into patient areas. For this reason, an
additional factor of 10/3 has been incorporated into the formulae used in
calculating the recommended separation distance for transmitters in these
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