Welch Allyn Connex Spot Monitor Directions For Use Manual page 155

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.
Rated max. output
power of transmitter
(W)
0.01
Electromagnetic immunity
3 Vrms 3 Vrms
150 kHz to 80 MHz
3 V/m 80 MHz to 1 GHz 3 V/m
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz 80 MHz to 800 MHz
d= (1.17) d= (1.17)
0.11667 0.11667
Guidance and manufacturer's declaration 149
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
a
survey , should be less than the compliance
level in each frequency range
may occur in the vicinity of equipment marked
with the following symbol:
800 MHz to 2.5 GHz
d= (2.23)
0.23333
b
. Interference