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8.1
Electrical Safety
Guidance and Manufacturer's Declaration - Electromagnetic Immunity
DUO is intended for use in the electromagnetic environment specified below. The user of the Eko DUO should assure that it is used in such an environment.
Immunity Test
IEC 60601 Test Level
Electrostatic Discharge
+/- 8 kV contact
(ESD) IEC 61000-4-2
+/- 15 kV air
Electrical Fast Transient/
+/- 2 kV for supply lines
Burst
+/- 1kV for input/output lines
IEC 61000-4-4
Surge
+/- 1 kV line to line
IEC 61000-4-5
+/- 2 kV line to earth
Voltage dips, short
5% U
(95% dip in U
T
interruptions and voltage
40% U
(60% dip in U
T
variations on power supply
70% U
(30% dip in U
T
input lines
<5% U
(>95% dip in U
T
IEC 61000-4-11
Power frequency (50/60
30 A/m
Hz) magnetic field
IEC 61000-4-8
Conducted RF
3 Vrms
IEC 61000-4-6
150kHz - 80 Mhz
Radiated RF
3 V/m
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 is affected by absorption and reflection from structures, objects and people.
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
a
accuracy. To address 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 DUO is used exceeds the applicable RF
compliance level above, DUO should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating DUO.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
b
Compliance Level
+/- 8 kV contact
+/- 15 kV air
+/- 2 kV for supply lines
+/- 1kV for input/output lines
+/- 1 kV line to line
+/- 2 kV line to earth
) for 0.5 cycles
5% U
(95% dip in U
) for 0.5 cycles
T
T
T
) for 5 cycles
40% U
(60% dip in U
) for 5 cycles
T
T
T
) for 25 cycle
70% U
(30% dip in U
) for 25 cycle
T
T
T
) for 5 sec
<5% U
(>95% dip in U
) for 5 sec
T
T
T
30 A/m
3 Vrms
150kHz - 80 Mhz
3 V/m
80 Mhz to 2.5 Ghz
Electromagnetic Environment-Guidance
Floors should be wood, concrete, or ceramic tile. If floors are covered with synthetic material, the relative humidity should be at
least 30%
Mains power quality should be that of a typical commercial or hospital environment
Mains power quality should be that of a typical commercial or hospital environment
Mains power quality should be that of a typical commercial or hospital environment.
Power frequency magnetic fields should be at levels characteristic of a typical location in a typical commercial magnetic field or
hospital environment.
Portable and mobile RF communications equipment should be used no closer to any part of DUO, including cables, than the
recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
Recommended separation distance:
d = [ 3.5 / V
] √P
1
d = [ 3.5 / E
] √P 90 MHz to 800 MHz
1
d = [ 7 / E
] √P 800 Mhz to 2.5 GHz
1
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 determxined by an
electromagnetic site survey,
should be less than the compliance level in each frequency range.
a
vicinity of equipment marked with the following symbol:
P.
20
Interference may occur in the
b
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