IEC 62479:2010 pdf free download Assesment of the compliance of low-power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz)
1 Scope
This International Standard provides simple conformity assessment methods for low-power electronic and electrical equipment to an exposure limit relevant to electromagnetic fields (EMF). If such equipment cannot be shown to comply with the applicable EMF exposure requirements using the methods included in this standard for EMF assessment, then other standards, including IEC 6231 1 or other (EMF) product standards, may be used for conformity assessment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 62311，Assessment of electronic and electrical equipment related to human exposurerestrictions for electromagnetic fields (0 Hz – 300 GHz)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
available antenna power
the maximum power，averaged over a time interval equal to the averaging time，supplied tothe antenna feed line that can be theoretically delivered by a source having an impedance ofpositive real part to a directly connected load when the impedance of the load is widely varied
NOTE1The available antenna power is obtained when the resistance of the load is equal to that of the sourceand its reactance is equal in magnitude but of opposite sign. However, other scenarios are possible e.g. if the PAmonitors the current rather than the actual power, a changing antenna impedance (when DUT is operated close tothe body) might actually cause a higher output power than the matched load.Then, a push-pull analysis with variedrealistic loads (according to antenna impedance in the vicinity of the body) should be performed.
NOTE 2 ln some cases,conditions such as overheating or overvoltage prevent the available antenna power frombeing obtained.
NOTE 3 Time average shall be taken during continuous or maximum duty cycle transmission at maximum powerto the extent possible for a given technology.
NOTE 4Adapted from IEC 60050-702:1992 [11]1),702-07-10.
NOTE 5 Antenna feed line is defined by IEC 60050-712:1992[12],712-06-01.
3.2
average total radiated power
the time average of the total radiated power over a time interval equal to the averaging time.
This time average is taken during continuous or maximum duty cycle transmission at maximum power to the extent possible for a given technology
NOTE If the user is in the reactive near field of the antenna, the presence of the user may result in a change in the total radiated power due to a change in the antenna impedance. In this case, the average total radiated power must be the maximum possible power in the presence of the user.
3.3
averaging time
t avg
the appropriate time over which exposure is averaged for purposes of determining compliance with exposure limits
3.4
basic restriction
restriction(s) on exposure to time-varying electric, magnetic, and electromagnetic fields that are based directly on established health effects
NOTE Depending upon the frequency of the field, the physical quantities used to specify these restrictions are current density, specific absorption rate (SAR), and power density.
IEC 62479:2010 pdf free download
