21. EMC PRECAUTIONS
Use special precautions regarding EMC according to the
information provided below.
Other portable and mobile RF communications equipment can
affect performance. Do not use when adjacent to or stacked with
other electrical equipment. Use of leads or probes other than
those listed in section 18 may affect EMC performance.
Guidance and manufacturer’s declaration - electromagnetic
emissions
The Touch TENS is intended for use in the electromagnetic
environment specified below.
The customer or the user of the Touch TENS should assure that it is
used in such an environment.
Emissions test
Compliance
Electromagnatic environment - guidance
RF emissions
Group 1
The model itouch uses RF energy only for its
CISPR 11
internal function. Therefore, its RF emissions
are very low and are not likely to cause any
interference in nearby electronic equipment
RF emissions
Class B
The model itouch is suitable for used in
CISPR 11
domestic establishment and in establishment
directly connected to a low voltage power
Harmonic emissions
Not applicable
supply network which supplies buildings used
IEC61000-3-2
for domestic purposes.
Voltage fluctuations/ flicker Not applicable
emissions IEC 61000-3-3
21
22
The Touch TENS is intended for use in the electromagnetic
environment specified below. The customer or the user of the
Touch TENS should assure that it is used in such an environment.
Immunity
IEC 60601 test Compliance Electromagnetic environment – guidance
test
level
level
Portable and mobile RF communications
equipment should be used no closer to any
part of the model itouch, including cables,
than the recommended separation distance
calculated from the equation applicable to
the frequency of the transmitter
Recommended separation distance 3V
d = 1.2√ P 80M Hz to 800MHz
Conducted 3 Vrms
3 Vrms
d = 2.3√ pt P 800MHz to 2.5GHz
RF
150 kHz to 80
where P is the maximum output power
IEC 61000- MHz
rating of the transmitter in watts (W)
4-6
according to the transmitter manufacturer
and d is the recommended separation
distance in meters (m).
Radiated RF 3 V/m
3 V/m
Field strengths from fixed RF transmitters,
IEC 61000-4 80 MHz to 2,5
as determined by an electromagnetic site
-3
GHz
survey, should be less than the compliance
level in each frequency range.
Interference may occur in the vicinity of
equipment marked with the symbol on the
left of this box
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 model itouch is used
exceeds the applicable RF compliance level above, the model itouch should be observed
to verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as re-orienting or relocating the model itouch.
b.Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
