Puritan Bennett KnightStar 330 User Manual download pdf (Page 59)

EMC information

Y-500009-00 Rev. J (6/06) KnightStar 330 User’s Manual

6-5

Field strengths from fixed

RF transmitters as

determined by an

electromagnetic site

survey

, should be less

than the compliance level

in each frequency range

Interference may occur in

the vicinity of equipment

marked with the following

symbol:

• 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.

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 asses 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 KnightStar 330 is used exceeds the applicable RF compliance level above,

the KnightStar 330 should be observed to verify normal operation. If abnormal performance is

observed, additional measures may be necessary, such as reorienting or relocating the KnightStar 330.

Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

† 80 MHz to 800 MHz

‡ 800 MHz to 2.5 GHz

Table 6-3: Electromagnetic immunity –

conducted and radiated RF (continued)

The KnightStar 330 is intended for use in the electromagnetic environment specified

below. The customer or the user of the KnightStar 330 should assure that it is used in

such an environment.

Immunity

test

IEC 60601

test level

Compliance

level

Electromagnetic

environment –

guidance

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