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19. 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 electrodes other than those listed in section 16 may affect
EMC performance.
Guidance and manufacturer’s declaration - electromagnetic emissions
The Sports TENS 2 is intended for use in the electromagnetic environment specified below. The customer or the user of the Sports
TENS 2 should assure that it is used in such an environment.
Emissions test Compliance Electromagnatic environment - guidance
RF emissions Group 1 The Sports TENS 2 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 Sports TENS 2 is suitable for used in
domestic establishment and in establishment
directly connected to a low voltage power
supply network which supplies buildings used
for domestic purposes.
Harmonic emissions
IEC61000-3-2 Not applicable
Voltage fluctuations/
flicker emissions
IEC 61000-3-3 Not applicable
The Sports TENS 2 is intended for use in the electromagnetic environment specified below. The customer or
the user of the Sports TENS 2 should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level Electromagnetic
environment guidance
Electrostatic ±6 kV contac ±6 kV contact Floors should be wood,
discharge (ESD) ±8 kV air ±8 kV air concrete or ceramic tile
IEC 61000-4-2
If floors are covered with synthetic material, the relative humidity should be at least 30%.
Electrical fast
transient/burst ±2 kV for power supply lines Not applicable Not applicable
IEC 61000-4-4 ±1 kV for Input/output lines
Surge
IEC 61000-4-5 ±1 kV differential mode Not applicable Not applicable
±2 kV common mode
Voltage dips, short <5 % UT (>95 % dip in UT) for 0,5 cycle
interruptions and 40 % UT(60 % dip in UT ) for 5 cycles
voltage variations 70 % UT (30 % dip in UT ) for 25 cycles
on power supply <5 % UT (>95 % dip in UT ) for 5s
input lines
IEC 61000-4-11
Power frequency (50/60 3 A/m Not applicable Not applicable
Hz) magnetic field
IEC 61000-4-8
NOTE UT is the a.c. mains voltage prior to application of the test level
The Sports TENS 2 is intended for use in the electromagnetic environment specified below. The customer or
the user of the Sports TENS 2 should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level Electromagnetic environment guidance
Conducted RF 3 Vrms 3 Vrms
IEC 61000-4-6 150 kHz to 80 MHz
Radiated RF 3 Vrms 3 Vrms
IEC 61000-4-3 80 MHz to 2,5 GHz
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 Sports TENS 2 is used exceeds the applicable RF compliance level above, the model
Sports TENS 2 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 Sports TENS 2.
b.Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Portable and mobile RF communications
equipment should be used no closer to any part
of the Sports TENS 2, 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
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,
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
Recommended separation distances between portable and mobile RF communications equipment
and the Sports TENS 2
The Sports TENS 2 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the model Sports TENS 2 can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and the model Sports TENS 2
as recommended below, according to the maximum output power of the communications equipment.
Rated maximum Separation distance according to frequency of transmitter M
output power of
transmitter W 150kHz to 80MHz 80 MHz to 800 MHz 800MHz to 2.5GHz
d=1.2√P d=2.3√P d=2.3√P
0.01 0.12 0.12 0.23
0.1 0.38 .38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be
estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.