E
LECTRICAL
I
NFORMATION
Blanket Warmer
▪
Operator’s Manual
▪
MN-39924
▪
Rev 3
▪
3/20
53
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Electromagnetic
emissions
The warmer is intended for use in the electromagnetic environment specified
below.
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Immunity test
IEC 60601 test level
Compliance level
Electromagnetic environment - guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 V/m
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
3 V/m
Portable and mobile RF communications
equipment should be used no closer to any
part of the warmer, including cables, than
the recommended separation distance
calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance
d = [3.5/3] √P
d = [3.5/3] √P 80 MHz to 800 MHz
d = [7/3] √P 800 MHz to 2.5 GHz
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
1
, should be less than the compliance
level in each frequency range
2
.
Interference may occur in the vicinity of
equipment marked with the following
symbol:
NOTE:
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.
1. 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 warmer is used exceeds
the applicable RF compliance level above, the warmer should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the warmer.
2. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [VI] V/m.
