Keeler PSL Classic, Инструкция по эксплуатации

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15. Specifications and electrical ratings
Guidance and manufacturer’s declaration – electromagnetic immunity
The Keeler Portable Slit Lamp is intended for use in the electromagnetic environment specified below. The customer or user should assure
that it is used in such an environment.
Immunity test IEC 60601 Test level Compliance level Electromagnetic environment - guidance
Portable and mobile RF communications equipment should be used
no closer to any part of the Keeler Portable Slit Lamp, including
cables, than the recommended separation distances calculated
from the equation applicable to the frequency of the transmitter.
Recommended separation distance
Conducted RF 3 Vrms 3 V d = 1.2
√
p
IEC 61000-4-6
Radiated RF 3 V/m 3 V/m d = 1.2
√
p 80MHz to 800 MHz
IEC 61000-4-3
80MHz to 2.5GHz
d = 2.3
√
p 800MHz to 2.5GHz
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 fixed RF transmitters, as determined by an
electromagnetic site survey¹, should be less than the compliance
level in each frequency range.²
Interference may occur in the vicinity of
equipment marked with the following symbol:
Note 1 At 80MHz and 800MHz, the higher frequency range applies.
Note 2 These guide lines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures,
objects and people.
¹ Field strengths from fixed transmitters, such as base stations ( 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 Keeler Portable Slit
Lamp is used exceeds the applicable RF compliance level above, the Keeler Portable Slit Lamp should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orientating or relocating the Keeler Portable Slit Lamp.
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² Over the frequency range 150kHz to 80 MHz, field strengths should be less than 3 V/m.