Beurer FT 90 - Manual (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 specified 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 fixed 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 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 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, field strengths should be less than 3 V/m.