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The Welch Allyn Green Series IV, 300, 600, and 900 Exam Lights are intended for use in the electromagnetic
environment specified below. The customer or the user of the Welch Allyn Green Series IV, 300, 600, and 900 Exam
Lights should assure that it is used in such an environment.
Immunity test
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
Note1: 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 Welch Allyn Green Series IV, 300, 600, and 900
Exam Lights are used exceeds the applicable RF compliance level above, the Welch Allyn Green Series IV, 300, 600, and
900 Exam Lights should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the Welch Allyn Green Series IV, 300, 600, and 900 Exam
Lights.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Electromagnetic immunity
IEC 60601 test level
Compliance level
3 Vrms
3 Vrms
150 kHz to 80 MHz
6Vrms in ISM and
6Vrms .
amateur radio bands
between 150 kHz and
80 MHz.
10 V/M, 80 MHz to 2.7
10 V/M
GHz
Welch Allyn Green Series IV, 300, 600, and 900 Exam Lights
Electromagnetic environment - guidance
Portable and mobile RF communications
equipment should be used no closer to any part
of the Welch Allyn Green Series IV, 300, 600,
and 900 Exam Lights, including cables, than the
recommended separation distance calculated
from the equation applicable to the frequency
of the transmitter.
Recommended separation distance
800 MHz to 2.7 GHz
80 MHz to 800 MHz
where P is the maximum output power rating of
the transmitter in watts (W) and d is the
recommended separation distance in meters
(m). Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
a
survey
, should be less than the compliance
level in each frequency range
may occur in the vicinity of equipment marked
with the following symbol:
b
. Interference
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