natus neoBLUE, Руководство по обслуживанию

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Chapter 7 Electromagnetic Specifications
Table 7.3 Electromagnetic immunity
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
3 Vrms
3 V/m
Portable and mobile RF communications equipment
should be used no closer to any part of the neoBLUE
®
LED Phototherapy device, including cables, than the
recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.
Recommended separation distance:
d =
1.2
√
P 150 kHz to 80 MHz
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
transmitter in Watts (W) according to the transmitter
manufacturer and (
d ) is the recommended separation
distance in meters (m). Field strengths from fixed RF
transmitters, as determined by an electromagnetic site
survey1, should be less than the compliance level in each
frequency range2. Interference may occur in the vicinity of
equipment marked with the following symbol:
1. Field strengths from fixed transmitters, such as the base station for radio (cellular/cordless) telephones
and land mobile radios, amateur radio, AM and FM 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 neoBLUE
®
LED Phototherapy device is used exceeds the applicable RF compliance shown in the
table above, the neoBLUE
®
LED Phototherapy device should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orienting or
relocating the neoBLUE
®
LED Phototherapy device.
2. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
NOTE:
• At 80 MHz and 800 MHz, the higher frequency range applies.
• These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption
and reflection from structures, objects, and people.
The neoBLUE
®
LED Phototherapy device is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the neoBLUE
®
LED Phototherapy
device can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the neoBLUE
®
LED Phototherapy
device as recommended below, according to the maximum output power of the communications
equipment.
44
neoBLUE LED Phototherapy System Service Manual
PN 001320 Rev K