Beurer FT 90 User Manual download pdf (Page 139)

139

Table 2

For all ME EQUIPMENT and ME SYSTEMS

Guidance and manufacturer’s declaration – electromagnetic immunity

The FT 90 is intended for use in the electromagnetic environment specied below.

The customer or the user of the FT 90 should assure that it is used in such an environment.

Immunity test IEC 60601 test

level

Compliance

level

Electromagnetic environment – guidance

Conducted RF

IEC 61000-4-6

Radiated RF

IEC 61000-4-3

3 Vrms

150 kHz to 80 MHz

3 V/m

80 MHz to 2.5 GHz

Not applicable

3 V/m

Portable and mobile RF communications equipment should

be used no closer to any part of the FT 90, including cables,

than the recommended separation distance calculated from

the equation applicable to the frequency of the transmitter.

Recommended separation distance

d = 1.2

d = 1.2 80 MHz to 800 MHz

d = 2.3

800 MHz to 2.5 GHz

where P is the maximum output power rating of the transmit-

ter in watts (W) according to the transmitter manufacturer and

d is the recommended separation distance in meters (m).

Field strengths from xed RF transmitters, as determined by

an electromagnetic site survey, a should be less than the

compliance level in each frequency range b.

Interference may occur in the vicinity of equipment

marked with the following symbol:

NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.

NOTE 2 These guidelines may not apply in all situations.

Electromagnetic propagation is aected by absorption and reection from structures, objects and people.

a. Field strengths from xed 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 xed RF transmitters, an electromagnetic site survey

should be considered. If the measured eld strength in the location in which the FT 90 is used exceeds the appli-

cable RF compliance level above, the FT 90 should be observed to verify normal operation. If abnormal perfor-

mance is observed, additional measures may be necessary, such as reorienting or relocating the FT 90.

b. Over the frequency range 150 kHz to 80 MHz, eld strengths should be less than 3 V/m.

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