BS 7570:2000

Committees responsible
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Validation accuracies
5 Consistency
6 Frequency of validation and calibration
7 Validators of welding equipment
8 Validation
8.1 General
8.2 MMA
8.3 TIG
8.4 MIG/MAG and FCW
8.5 Auxilliary components
9 Validation techniques
9.1 General
9.2 Safety precautions
9.3 Instrumentation
9.4 Power source loads
9.5 Method
10 Validation labels and certificates
10.1 Validation labels
10.2 Validation certificate
Annex A (informative) Proposed accuracies for precision
        grade power sources
Annex B (informative) Wire feed equipment
Annex C (informative) Slope, pulse and synergic controls
Annex D (informative) Precautions to be taken with TIG
        welding equipment
Annex E (informative) The validation of ancillary
        components in a welding system
Annex F (informative) Voltage drops in the welding
        circuit
Figure F.1 - Example of a welding circuit
Table 1 - Validation accuracies for standard grade power
          sources
Table A.1-Validation accuracies for precision grade power
          sources
Table B.1-Validation accuracies for wire feed equipment
Table F.1-Voltage drop in copper and aluminium welding
          cables at normal and elevated temperatures

Recommends validation procedures for welding equipment constructed and used to the accuracy defined in BS EN 60974-1 or other standards equivalent to it. The equipment is designated as standard grade. Equipment covered includes welding power sources, wire feeders and welding instrumentation. Also gives a guide on the validation and calibration of ancillary equipment capable of affecting the weld quality, for example, thermocouples, flow gauges, manipulators and robots.