Citizen CH-453 Manuel D'instructions page 27

Guidance and manufacturer's declaration - electromagnetic immunity
The device (CITIZEN Blood Pressure Monitor) is intended for use in the electromagnetic environment
specifi ed below. The customer or the user of the device should assure that it is used in such an environment.
Conducted
RF
IEC 61000-
4-6
Radiated
RF
IEC 61000-
4-3
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 refl ection from structures, objects and people.
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 considered. If the measured
fi eld strength in the location in which the device is used exceeds the applicable RF compliance
level above, the deivce should be observed to verify normal operation. If abnormal performance
is observed, additional measures may be necessary, such as reorienting or relocating the device.
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 device (CITIZEN Blood Pressure Monitor)
The device is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the device can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment (transmitters) and the deivce
as recommended below, according to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter
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 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 refl ection from structures, objects and people.
00̲CH453̲all.indb Eng-27 00̲CH453̲all.indb Eng-27
Portable and mobile RF communications equipment should be used no closer to
any part of the device, including cables, than the recommended separation distance
calculated from the equation applicable to the frequency of the transmitter.
Recommended separation distance
3 Vrms 3 Vrms d = 1.2
150 kHz
to
80 MHz
3 V/m 3 V/m d = 1.2
80 MHz d = 2.3
to
2.5 GHz 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 metres (m).
Field strengths from fi xed RF transmitters, as determined
by an electromagnetic site survey,
compliance level in each frequency range.
Interference may occur in the vicinity of
equipment marked with the following symbol:
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
W
d = 1.2
0.01 N/A
0.1 N/A
1 N/A
10 N/A
100 N/A
80 MHz to 800 MHz
800 MHz to 2.5 GHz
a)
m
80 MHz to 800 MHz
d = 1.2
0.12
0.38
1.2
3.8
12
- Eng 27 -
should be less than the
b)
800 MHz to 2.5 GHz
d = 2.3
0.23
0.73
2.3
7.3
23
2012/09/18 18:43:55 2012/09/18 18:43:55