GB/T 7247.1-2024Safety of Laser Products - Part 1: Equipment Classification and Requirements (English PDF)

National Standard of the People's Republic of China

ICS

31.260

Classification

L 51

Replacing

GB 7247.1-2012

Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China.

Contents

• Foreword4
• Introduction7
• 1 Scope10
• 2 Normative References12
• 3 Terms and Definitions12
• 4 Classification Principles30
• 4.1 General30
• 4.2 Classification responsibilities30
• 4.3 Classification rules30
• 4.4 Laser products designed to function as conventional lamps37
• 5 Determination of the Accessible Emission Level and Product Classification38
• 5.1 Tests38
• 5.2 Measurement of laser radiation39
• 5.3 Determination of the class of the laser product40
• 5.4 Measurement geometry52
• 6 Engineering Specifications57
• 6.1 General remarks and modifications57
• 6.2 Protective housing58
• 6.3 Access panels and safety interlocks58
• 6.4 Remote interlock connector60
• 6.5 Manual reset60
• 6.6 Key control60
• 6.7 Laser radiation emission warning60
• 6.8 Beam stop or attenuator61
• 6.9 Controls61
• 6.10 Viewing optics61
• 6.11 Scanning safeguard61
• 6.12 Safeguard for Class 1C products62
• 6.13 "Walk-in" access62
• 6.14 Environmental conditions62
• 6.15 Protection against other hazards63
• 6.16 Power limiting circuit63
• 7 Labelling64
• 7.1 General64
• 7.2 Class 1 and Class 1M66
• 7.3 Class 1C67
• 7.4 Class 2 and Class 2M68
• 7.5 Class 3R69
• 7.6 Class 3B70
• 7.7 Class 470
• 7.8 Aperture label71
• 7.9 Radiation output and standards information71
• 7.10 Labels for access panels72
• 7.11 Warning for invisible laser radiation73
• 7.12 Warning for visible laser radiation74
• 7.13 Warning for potential hazard to the skin or anterior parts of the eye74
• 8 Other Informational Requirements74
• 8.1 Information for the user74
• 8.2 Purchasing and servicing information76
• 9 Additional Requirements for Specific Laser Products77
• 9.1 Other parts of the standard series IEC 6082577
• 9.2 Medical laser products78
• 9.3 Laser processing machines78
• 9.4 Electric toys78
• 9.5 Consumer electronic products78
• Annex A (Informative) Maximum Permissible Exposure Values79
• A.1 General remarks79
• A.2 Limiting apertures84
• A.3 Repetitively pulsed or modulated lasers85
• A.4 Measurement conditions87
• A.5 Extended source lasers88
• Annex B (Informative) Examples of Calculations89
• B.1 Symbols used in the examples of this annex89
• B.2 Classification of a laser product - Introduction90
• B.3 Examples94
• C.1 General100
• C.2 Description of classes100
• C.3 Limitations of the classification scheme105
• C.4 References106
• Annex D (Informative) Biophysical Considerations107
• D.1 Anatomy of the eye107
• D.2 The effects of laser radiation on biological tissue108
• D.3 MPEs and irradiance averaging115
• D.4 Reference documents115
• Annex E (Informative) MPEs and AELs Expressed as Radiance117
• E.1 Background117
• E.2 Radiance values117
• E.3 Rationale118
• Annex F (Informative) Summary Tables121
• Annex G (Informative) Overview of Associated Parts of IEC 60825124
• Annex NA (Informative) Interpretation of Relevant Parts of IEC 60825126
• NA.1 Interpretation sheet 1126
• NA.2 Interpretation sheet 2133
• Bibliography135