Operation Manual

61Electromagnetic compatibility
IREGB
Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidance
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 dis- tance in metres (m). Field strengths from fixed RF transmitters, as determined 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 mar- ked 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 measu- red field strength in the location in which the Sphygmomanometer (MD4000) is used exceeds the applicable RF compliance level above, the Sphygmomanometer (MD4000) should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the Sphygmomanometer (MD4000). b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.