Welch Allyn VSM 6000 series Directions For Use Manual page 113

Directions for use
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
Note1: 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
monitor is used exceeds the applicable RF compliance level above, the monitor should be observed to verify
normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the monitor.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF
communications equipment and the monitor
The monitor is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or user of the monitor can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the monitor as recommended below, according to the maximum output power of the communications
equipment.
Electromagnetic immunity
3 Vrms 3 Vrms
150 kHz to 80 MHz
3 V/m 80 MHz to 1 3 V/m
GHz
Separation distance according to frequency of transmitter (m)
Guidance and manufacturer's declaration 107
Portable and mobile RF communications
equipment should be used no closer to any
part of the monitor, including cables, than
the recommended separation distance
calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance
d= (1.17)
d= (1.17) 80 to 800 MHz
d= (2.33) 800 MHz to 2,5 GHz
whereP is the maximum output power
rating of the transmitter in watts (W) andd
is the recommended separation distance
in meters (m). Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey
less than the compliance level in each
b
frequency range . Interference may occur
in the vicinity of equipment marked with
the following symbol:
a
, should be