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    Table 16.  Electromagnetic Immunity

                   Guidance and manufacturer’s declaration – electromagnetic immunity
                   The electronics unit is intended for use in the electromagnetic environment specified below. The customer or the user of the
                   electronics unit should assure that it is used in such an environment.
                   Immunity Test    IEC 60601          Compliance level    Electromagnetic environment - guidance
                                    Test level
                                                                           the transmitter.

                                                                           Recommended separation distance

                                                                                      80 MHz to 800 MHz

                                                                                      800 MHz to 2.7 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 survey,
                                                                           should be less than the compliance level in each
                                                                           frequency range .
                                                                                      16
                                                                           Interference may occur in the vicinity of
                                                                           equipment marked with the following symbol:

                   Electromagnetic site survey- 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
                   measured field strength in the location in which the electronics unit is used exceeds the applicable RF compliance level above, the
                   electronics unit should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
                   necessary, such as reorienting or relocating the electronics unit.

                   Table 17.  Recommended separation distances between portable and mobile RF communications equipment and the electronics
                     unit
                   The electronics unit is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
                   customer or the user of the electronics unit can help prevent electromagnetic interference by maintaining a minimum distance
                   between portable and mobile RF communications equipment (transmitters) and the electronics unit as recommended below,
                   according to the maximum output power of the communications equipment.
                   Rated Maximum output   Separation distance according to frequency of transmitter
                                                                                  17
                   power of transmitter (W)
                                         150 kHz to 80 MHz      80 MHz to 800 MHz       800 MHz to 2,7 GHz
                                                                               18
                                         d = 1.2 √P             d = 1.2 √P              d = 2.3 √P
                   0.01                  0.12 m                 0.12 m                  0.23 m
                   0.1                   0.38 m                 0.38 m                  0.73 m
                   1                     1.20 m                 1.20 m                  2.30 m
                   10                    3.79 m                 3.79 m                  7.27 m
                   100                   12.00 m                12.00 m                 23.00 m
                   For transmitters rated at a maximum output not listed above, the recommended separation distance (d) in meters can be estimated
                   using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in
                   watts (W) according to the transmitter manufacturer.
                   For two electronics units operating simultaneously and in proximity test results indicate that the separation distance should be
                   greater than 4 meters (13 feet and 2 inches).

                   16  Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
                   17  These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects, and people.
                   18  At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.

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