NEN EN 50444 : 2008

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

Applicable to equipment for arc welding and allied processes designed for use in industrial or domestic environments, including welding power sources, wire feeders and ancillary equipment, e.g. torches, liquid cooling systems and arc striking and stabilising devices.