User's Manual Part 10

182 EMC Compliance Welch Allyn Propaq LT Vital Signs Monitor
Guidance and manufacturer’s declaration—electromagnetic immunity
The battery-operated Propaq LT Series monitor is intended for use in the electromagnetic environment specified below.
The customer or the user of the monitor should assure that it is used in such an environment.
Immunity test IEC 60601 test
level
Compliance
level
Electromagnetic environment—guidance
Portable and mobile RF communications equipment should
be used no closer to any part of the battery-operated Propaq
LT Series monitor, including cables, than the recommended
separation distance calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance
Conducted RF
IEC 61000
-4-6
3 V
rms
150 kHz to 80 MHz
3 V
rms
d = 1.2
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m d = 1.2 80 MHz to 800 MHz
d = 2.3 800 MHz to 2.5 GHz
where P is the maximum output power rating of the
transmitter in watts according to the transmitter
manufacturer and d is the recommended separation distance
in meters.
Field strengths from fixed RF transmitters, as determined by
an electromagnetic site survey
a
, should be less than the
compliance level in each frequency range
b
.
Interference may occur in the vicinity of equipment marked
with the following symbol:
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
reflection from structures, objects and people.
a 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 battery-operated Propaq LT Series monitor is used exceeds the applicable RF compliance
level above, the battery-operated Propaq LT Series monitor should be observed to verify normal operation. If abnormal performance
is observed, additional measures may be necessary, such as reorienting or relocating the battery-operated Propaq LT Series monitor.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
P
P
P