biodex 950-401 Application/Operation Manual page 99

Immunity
Test
NOTE 1: UT is the a.c. mains voltage prior to application of the test level.
NOTE 2: At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 3: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflections from structures, objects and people.
Field strength from mixed transmitters, such as base stations for radio telephones and land
mobile radios, amateur radio, AM or FM 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 Gait Trainer 3 is used exceeds the applicable RF
compliance levels above, the Gait Trainer 3 should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as reorienting
or relocating the Gait Trainer 3. Over the frequency range 150 KHz to 80 MHz, field strengths
should be less than 3 V/m.
GAIT TRAINER 3 (v3.X SOFTWARE)
IEC 60601-1-2
Test Level
IEC 60601-1-2
Compliance
Level
frequency of the transmitter.
Recommended separation
distance:
d = 1.2√ P 150 KHz to 80 MHz
d = 1.2√ P 80 MHz to 800 MHz
d = 2.3√ P 800 MHz to 2.5 GHz
Where P is the maximum
output power rating of the
transmitter in watt (W)
according to the transmitter
manufacturer, and 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 following symbol:
Electromagnetic
Environment -Guidance
b
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