ELECTROMAGNETIC COMPATIBILITY (EMC)
20
NOTES:
•
Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey
a
, should be less than the
compliance levels in each frequency range
b
.
•
Interference may occur in the vicinity of equipment marked with the following symbol:
•
At 80 MHz and 800 MHz, the higher frequency range applies.
•
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) telephone 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
Zimmer®
UNIVERSAL power system or
Zimmer®
UNIVERSAL compact
battery charger is used exceeds the application RF compliance levels above, the
Zimmer®
UNIVERSAL power system or
Zimmer®
UNIVERSAL compact battery charger should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the
Zimmer®
UNIVERSAL power system or
Zimmer®
UNIVERSAL compact battery charger.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
RECOMMENDED SEPARATION DISTANCES
The
Zimmer®
UNIVERSAL power system and
Zimmer®
UNIVERSAL compact battery charger are intended for use in an
electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the
Zimmer®
UNIVERSAL power system or
Zimmer®
UNIVERSAL compact battery charger as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter in
watts (W)
Separation distance according to frequency transmitter in meters (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
0.01
0.12 m
0.12 m
0.23 m
0.1
0.38 m
0.38 m
0.73 m
1
1.2 m
1.2 m
2.3 m
10
3.8 m
3.8 m
7.3 m
100
12 m
12 m
23 m
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m)
can be determined 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.
NOTES
:
•
At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
•
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from
structures, objects and people.
Summary of Contents for Universal Power System
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