18 MCC-M-BA-e-12116.3.1 Crucial features of performanceNote:The chair scale MCC-M does not have any crucial features of performanceas per IEC 60601-1. The system may be subject to interference by otherdevices even if these devices conform to current emission requirements asper CISPR.6.4 Minimum distancesRecommended safety distances between portable and mobile HFtelecommunication devices and the medical deviceThe chair scale MCC-M is designed for use in an electromagnetic environment in which HFdisturbance variables are controlled. The customer or user of the medical electrical device can helpavoiding electromagnetic disturbances by keeping the minimum distance between portable and mobileHF telecommunication devices (transmitters) and the chair scale MCC-M – depending on the outputperformance of the communication device, as stated below.Rated capacity oftransmitterWThe safety distance depends on the transmission frequencym150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2.5 GHz0.01 0.12 0.12 0.230.1 0.38 0.38 0.731 1.20 1.20 2.3010 3.80 3.80 7.30100 12.00 12.00 23.00For transmitters with a maximum rated capacity not stated in the table above you can calculate therecommended safety distance in metres (m) yourself by using the equation belonging to each column,whereby P equals the maximum rated capacity of the transmitter in Watt (W) as per details providedby the transmitter manufacturer.NOTE 1 Higher frequency range applies to 80 MHz and 800 MHz.NOTE 2 These guidelines may not be applicable in all cases.The spread of electromagnetic variables is influenced by absorption and reflections inbuildings, objects and humans.