118 Biodex Medical Systems, Inc. © 2017
Table 13.5. Immunity Test Tables
IEC 60601-1-2
Compliance level
Electromagnetic environment
– guidance
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.
a
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 Balance System SD is used exceeds the
applicable RF compliance levels above, the Balance System SD should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the
Balance System SD.
b
Over the frequency range 150 KHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended Separation Distances
Operating Temperature
Do not expose the equipment to a temperature change of more than 5° F (3° C) per hour. Limits
of low and high operating temperature ranges are 59° to 86° F (15° C to 30° C).
Recommended separation distances between portable and mobile RF communications equipment and the
Balance System SD.
The Balance System SD is intended for use in the electromagnetic environment in which radiated RF disturbance
are controlled. The customer or the user of the Balance System SD can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communication equipment
(transmitters) and the Balance System SD as recommended below, according to the maximum output power of
the communication equipment.
Rated maximum
output power of
transmitter [W]
Separation distance according to frequency of transmitter [m]
150 KHz to 80 MHz
d = 1.2" P
80 MHz to 800 MHz
d = 1.2" P
800 MHz to 2.5 GHz
d = 2.3" P
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.
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