Oakworks 300 Series Procedure Chair Rev.D - Manual (Page 20)

17
SPECIFICATIONS
Guidance and manufacturer’s declaration - electromagnetic immunity
The chair is intended for use in the electromagnetic environment specified below. The customer or the user of the
chair 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
3Vrms
3V/m
Portable and mobile RF communications equipment
should be used no closer to any part of the chair, includ-
ing cables, than the recommended separation distance
calculated from the equation applicable to the frequency
of the transmitter.
Recommended separation distance
d = 1.2 √ P
d = 1.2 √ P 80 MHz to 800 MHz
d = 2.3 √ P 800 MHz to 2,5 GHz
Where P is the maximum output power rating of the trans-
mitter in watts (W) according to the transmitter manufac-
turer and d is the recommended separation distance in
meters (m).
Field strengths from fixed RF transmitters, as deter-mined
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 chair is used exceeds the applicable RF compliance level above, the chair should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-
orienting or relocating the table
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 1 V/m.