I.S. EN 50444:2008
Withdrawn
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Hardcopy , PDF
09-16-2019
English
04-14-2008
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Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
1 Scope
2 Normative references
3 Terms and definitions
3.1 General
3.2 Specific for arc welding and similar applications
4 Physical quantities, units and constants
4.1 Quantities and units
4.2 Constants
5 Assessment procedures
5.1 Arc welding equipment components to be tested
5.2 Assessment conditions
5.3 Averaging
5.4 Pulsed or non-sinusoidal welding current
5.4.1 General
5.4.2 Summation for basic restriction assessment
5.4.2.1 Summation of current density components
without phase information
5.4.2.2 Summation of currents density components
including phase information
5.4.2.3 Summation of specific absorption rate (SAR)
components
5.4.3 Summation for reference level assessment
5.4.3.1 Summation for stimulation effects without
phase information
5.4.3.2 Effective reference level method
5.4.3.3 Summation for stimulation effects including
phase information
5.4.3.4 Summation for thermal effects
5.4.4 Equivalent frequency of induced current density
waveforms
5.5 Conductivity of living tissue
5.6 Frequency range limitations
5.7 Application of assessment procedures
5.8 Measurements
5.8.1 Measuring equipment
5.8.2 Static field measurements
5.8.3 Time domain field measurements
5.8.4 Broadband field measurements
5.8.5 Frequency selective field measurements
5.8.6 Time domain weighted field measurements
5.9 Analytical calculations
5.9.1 General information
5.9.2 Derivation of magnetic field based on welding current
5.9.3 Derivation of induced current density based on magnetic
field
5.10 Numerical calculations
5.10.1 General information
5.10.2 Derivation of magnetic field
5.10.3 Derivation of current density using conductive disc
models
5.10.4 Simulations based on anatomical body models
5.10.4.1 General information
5.10.4.2 Anatomical body models
5.10.4.3 Calculation methods
5.10.4.4 Position of the body model in relation to the
welding cables
6 Uncertainty of assessment
6.1 Including uncertainty
6.1.1 General information
6.1.2 Shared uncertainty budget
6.1.3 Using uncertainty in comparison against limit values
6.2 Evaluation of uncertainties
6.2.1 Introduction
6.2.2 Individual uncertainties
6.2.3 Combined uncertainties
6.3 Reasonable overall uncertainties
6.4 Examples of typical uncertainties
7 Assessment report
7.1 General principles
7.2 Items to be recorded in the assessment report
Annex A (normative) Assessment parameters
Annex B (informative) Examples for exposure assessment
Annex C (informative) Numerical simulation using anatomical body
models
Annex D (informative) Geometry factor and field gradients
Annex E (informative) Welding current ripple assessment
Annex F (informative) Summation using first order filter weighting
functions
Annex G (informative) Example for an uncertainty budget
Bibliography
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