Covidien Valleylab LS10 Service Manual page 32

Electromagnetic Compatibility (IEC 60601-1-2 and IEC 60601-2-2)
NOTE 1 At a 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 generator is used exceeds the
applicable RF compliance level above, the generator should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the generator.
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 communication
equipment and the generator
The generator is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the system can help prevent
electromagnetic interferences by maintaining a minimum distance between portable and mobile
RF communications equipment (transmitters) and the system as recommended below, according
to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter (W)
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be estimated using the equation applicable to the
frequency of the transmitter, where P is the maximum output power rating of the transmitter in
watts (W) according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
2-16
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz
d=1.2 x √P
0.01 0.12
0.1 0.37
1 1.2
10 3.7
100 12
Valleylab LS10, LS Series Single Channel Vessel Sealing Generator Service Manual
80 MHz to 800 MHz 800 MHz to 2.5 GHz
d=1.2 x √P
0.12
0.37
1.2
3.7
12
d=2.3 x √P
0.23
0.74
2.3
7.4
23