Welch Allyn 300 Series Vital Signs Monitor - User Manual - Manual (Page 76)

72 Chapter 7 Reference Welch Allyn Vital Signs Monitor 300 Series
Guidance and manufacturer’s declaration—electromagnetic immunity
The VSM 300 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 VSM 300 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 Vital Signs Monitor 300 Series monitor is used exceeds the applicable RF
compliance level above, the Vital Signs Monitor 300 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 Vital Signs Monitor 300 Series monitor.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
P
P
P