Sanitas SBM 52 Instructions For Use Manual page 32

Guidance and manufacture's declaration – electromagnetic immunity
a
Field strengths from fi 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 fi xed RF transmitters, an electromagnetic site survey should be con-
sidered. If the measured fi eld strength in the location in which the SBM52 blood pressure monitor is used exceeds the
applicable RF compliance level above, the SBM52 blood pressure monitor should be observed to verify normal opera-
tion. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the
SBM52 blood pressure monitor.
b
Over the frequency range 150 kHz to 80 MHz, fi eld strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment and the
EQUIPMENT or SYSTEM – for EQUIPMENT or SYSTEM that are not LIFE-SUPPORTING
Recommended separation distances between portable and mobile RF communications equipment and the SBM52
blood pressure monitor
The SBM52 blood pressure monitor is intended for use in an electromagnetic environment in which radiated RF distur-
bances are controlled. The customer or the user of the SBM52 blood pressure monitor can help prevent electroma-
gnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the SBM52 blood pressure monitor as recommended below, according to the maximum output
power of the communications equipment.
Rated maximum output
power of transmitter
(W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
metres (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maxi-
mum 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 aff ected by absorption and
refl ection from structures, objects and people.
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d =
0.117
0.370
1.170
3.700
11.7
32
(m)
80 MHz to 800 MHz
d =
0.117
0.370
1.170
3.700
11.7
800 MHz to 2.5 GHz
d =
0.234
0.740
2.340
7.400
23.4