91518 Multigas Analyzer Service Manual
A-3
Appendix A — Electromagnetic Compatibility
Frequency Separation Distances
Note:
This equipment 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
2 Hz sine
80% AM
3 V r.m.s.
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
2 Hz sine
80% AM
3 V/m
* 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 monitoring devices are used exceeds the applicable RF compliance level
above, the monitoring devices should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating
the monitoring devices.
** 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
