BodyMedia SenseWear Operating Manual page 5

Important Information About the SenseWear
Guidance and Manufacturer's Declaration - Emissions
®
The BT-2.4-WS (SenseWear biotransceiver) is intended for use in the electromagnetic environment specifi ed below.
The customer or user of the BT-2.4-WS should ensure that it is used in such an environment.
IEC 60601
Immunity Test
Test Level
Conducted RF 3 Vrms N/A
IEC 61000-4-6 150 kHz to 80 MHz
3 V/m
3 V/m
Radiated RF 80 MHz to 2.5 GHz
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
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biotransceiver
Compliance Electromagnetic
Level Environment - Guidance
Portable and mobile communications equipment
should be separated from BT-2.4-WS by no less
than the distances calculated/listed below:
• D=(3.5/V1)(Sqrt P)
• D=(3.5/E1)(Sqrt P) 80 to 800 MHz
• D=(7/EI)(Sqrt P) 800 MHz to 2.5 GHz
where P is the max power in watts and D is the
recommended separation distance in meters.
FIeld strengths from fi xed transmitters, as
determined by an electromagnetic site survey,
should be less than the compliance level in each
frequency range b .
Interference may occur in the vicinity of equip-
ment containing a transmitter symbol:
Important Information About the SenseWear
Field strenghts 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, and electromagnetic site survey should be considered. If the
measured fi eld strength in the location in which the BT-2.4-WS is used exceeds the applicable RF compliance level above,
the BT-2.4-WS should be observed to verify normal operation. If abnormal performance is observed, additional measures
may be necessary, such as re-orienting or relocationg the BT-2.4-WS.
Over the frequency range 150 kHz to 80 MHz, fi eld strengths should be less than 3 V/m.
Recommended Separations Distances for the BT-2.4-WS
®
The BT-2.4-WS (SenseWear biotransceiver) is intended for use in the electromagnetic environment in which radiated
disturbances are controlled. The customer or user of the BT-2.4-WS can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF Communications Equipment and the BT-2.4-BG as
recommended below, according to the maximum output power of the communications equipment.
Max Output Power Separation (m)
(Watts) 150kHz to 80MHz
D=(3.5/V1)(Sqrt P)
0.01 0.1166
0.1 0.3689
1 1.1666
10 3.6893
100 11.6666
For transmitters rated at a maximum output power not listed above, the recommended seperation distance d in meters (m)
can be determined 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 seperation distance for the higher frequency range applies.
NOTE 2 These guideleines may not apply in all situations. Electromagnetic propogation is affected by absorption and
refl ection from structures, objects and people.
®
biotransceiver
Separation (m) Separation (m)
80 to 800MHz 800MHz to 2.5GHz
D=(3.5/V1)(Sqrt P) D=(7/E1)(Sqrt P)
0.1166 0.2333
0.3689 0.7378
1.1666 2.3333
3.6893 7.3786
11.6666 23.3333
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