Service manual

Appendix A — Electromagnetic Compatibility
A-3
Frequency Separation Distances
!
• The 90387 bedside monitor is intended for use in an electromagnetic environment
in which radiated RF disturbances are controlled. The customer or user of the
equipment can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment
(transmitters) and this equipment, as recommended in the table below, according
to the maximum output power of the communications equipment.
Recommended Separation Distances Between Portable and Mobile RF Communications Equipment and
the Monitor (always evaluate electronic equipment on site before use)
Immunity Test
IEC 60601
Test Level
Compliance
Level
Electromagnetic Environment
Conducted RF
IEC 61000-4-6
150 kHz to
80 MHz
3 V r.m.s.
150 kHz to
80 MHz
3 V r.m.s.
1 kHz sine
80% AM
150 kHz to
80 MHz
3 V r.m.s.
2 Hz sine
80% AM
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:
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,* should be less than the
compliance level in each frequency range.**
Interference may occur in the vicinity of equipment
marked with the following symbol.
IEC 60417-5140: Non-ionizing electromagnetic
radiation
Radiated RF
IEC 61000-4-3
80 MHz to
2.5 GHz
3 V/m
80 MHz to
2.5 GHz
20 V/m
1 kHz sine
80% AM
80 MHz to
2.5 GHz
3 V/m
2 Hz sine
80% AM
* 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 monitors are used
exceeds the applicable RF compliance level above, the monitors should be observed to verify normal operation.
If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating
the monitors.
** Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [ V
1
] V/m.
d =
[
3.5
V
1
]
P
150 kHz to 80 MHz
d =
[
3.5
E
1
]
P
80 MHz to 800 MHz
d =
[
7
E
1
]
P
800 MHz to 2.5 GHz