Technical Committee106
Methods for the assessment of electric,
magnetic and electromagnetic fields
associated with human exposure
International Electrotechnical Commission
Michel Bourdages
Secretary
International Electrotechnical Commission Technical Committee 106
1
Summary
• Scope of Technical Committee (TC) 106
• The role of TC 106 in the assessment of
compliance with exposure limits
• Standards published since the last IAC
meeting
• Standards in progress
International Electrotechnical Commission Technical Committee 106
2
Scope of the IEC Technical Committee 106
TC 106 « Methods for the assessment of electric,
magnetic and electromagnetic fields associated
with human exposure » has been established at the
end of 1999.
TC 106 develops international standards on :
- Characterization of the electromagnetic
environments with regard to human exposure
- EMF measurement methods; instrumentation and
procedures
- Calculation methods
International Electrotechnical Commission Technical Committee 106
3
Scope of the IEC Technical Committee 106
• It covers the whole frequency range from
0 Hz to 300 GHz.
• It applies to basic restrictions and reference
levels (exposure limits).
Excluded are:
• The establishment of exposure limits
• Mitigation methods
International Electrotechnical Commission Technical Committee 106
4
The role of TC 106 in the assessment of
compliance with exposure limits
The ICNIRP 1998 Guidelines indicates that:
• “the reference levels are obtained from the basic
restrictions by mathematical modelling ….
They are given for the condition of maximum
coupling of the field to the exposed individual”.
• “If the measured or calculated value exceeds the
reference level, it does not necessarily follow
that the basic restriction will be exceeded.
However, whenever a reference level is
exceeded it is necessary to test compliance with
the relevant basic restriction”
International Electrotechnical Commission Technical Committee 106
5
Standard 62226-2-1: Method for calculating the
current density and internal electric field induced
in the human body
Low frequency exposure
limits have been established
in order to limit voltages or
currents induced in the human
body. These limits always
assume that the field in
uniform
Magnetic
field
International Electrotechnical Commission Technical Committee 106
6
Standard 62226-2-1: Method for calculating
the current density and internal electric field
induced in the human body
Current induced in a circular disk by a uniform
magnetic field
International Electrotechnical Commission Technical Committee 106
7
Standard 62226-2-1: Method for calculating
the current density and internal electric field
induced in the human body
Current
induced in
a circular
disk by a
uniform
magnetic
field
International Electrotechnical Commission Technical Committee 106
8
Standard 62226-2-1: Method for calculating
the current density and internal electric field
induced in the human body
Current induced in a circular disk by a non-uniform
magnetic field
International Electrotechnical Commission Technical Committee 106
9
Standard 62226-2-1: Method for calculating
the current density and internal electric field
induced in the human body
1,2
µA/m2)
1,0
0,8
Local
0,6
0,4
0,2
0,0
0
50
100
150
200
Current induced in a circular disk by a non-uniform
magnetic field
Position on disk diameter (mm)
International Electrotechnical Commission Technical Committee 106
10
Standards 62226-2-1: Method for calculating
the current density and internal electric field
induced in the human body
1,2
µA/m2)
1,0
3D
homogenous
model of the
human body
0,8
Local
0,6
0,4
0,2
0,0
0
50
100
150
200
Position on disk diameter (mm)
International Electrotechnical Commission Technical Committee 106
11
Standard 62209-1: Procedure to
determine the Specific Absorption Rate
(SAR) for hand-held mobile telephones
Phantom specification to measure SAR
produced by hand-held mobile telephones
International Electrotechnical Commission Technical Committee 106
12
Project 62233: Measurement methods for
electromagnetic fields of household appliances and
similar apparatus with regard to human exposure
International Electrotechnical Commission Technical Committee 106
13
Project 62233: Measurement methods for
electromagnetic fields of household
appliances and similar apparatus with regard
to human exposure
This standard address the following questions:
• How to test an appliance for compliance with
exposure limits?
• What type of measuring equipment can be
used?
• At what distance from the source the
measurement must be done?
• How to measure harmonics?
• How to deal with a non-uniform field?
International Electrotechnical Commission Technical Committee 106
14
Project 62369: Evaluation of human exposure to
electromagnetic fields from Short Range
Devices in the frequency range 0-300 GHz Part 1: Fields produced by devices used for
Electronic Article Surveillance, Radio
Frequency Identification and similar systems.
Electronic
Article
Surveillance
device
International Electrotechnical Commission Technical Committee 106
15
Project 62232:
Determination of RF
fields in the vicinity of
mobile communication
base stations used for
the purpose of
evaluating human
exposure
International Electrotechnical Commission Technical Committee 106
16
Project 62110: Measurement procedures for
electric and magnetic fields generated by AC
power lines with regard to human exposure
International Electrotechnical Commission Technical Committee 106
17
Conclusion
• TC 106 is developing standards to measure electric,
magnetic and electromagnetic fields and to test
compliance with exposure limits (conformity assessment).
• These standards will be general and applicable to any
exposure limits.
• In the low frequency range, TC 106 will develop:
– Tools to assess the effect of a non-uniform field
– Calculation method of induced currents using more
realistic 2D and 3D human model
International Electrotechnical Commission Technical Committee 106
18
Conclusion
In the high frequency range, TC 106 is
developing standards on:
• Measurement methods of electromagnetic
fields and Specific Absorption Rate (SAR)
• Calculation methods of induced currents and
SAR
• Procedures to test compliance with exposure
limits (conformity assessment).
International Electrotechnical Commission Technical Committee 106
19