03/313421 DC : DRAFT NOV 2003

1 Scope
2 Normative references
3 Definitions
4 General requirements
  4.1 Optical equipment
  4.2 Risk levels
5 Protection concepts
  5.1 General
  5.2 Requirements for inherently safe optical radiation
      5.2.1 General
      5.2.2 Continuous wave radiation
      5.2.3 Pulsed radiation
      5.2.4 Ignition tests
      5.2.5 Optical devices incorporating the inherently
            safe concept
  5.3 Requirements for protected optical radiation
      5.3.1 Radiation inside fibre etc. (No mechanical damage
            to be expected)
      5.3.2 Radiation inside enclosures
  5.4 Optical radiation interlock with optical fibre breakage
  5.5 Suitability of protection concepts
6 Type verifications and tests
  6.1 Test set-up for ignition tests with continuous wave
      radiation and pulses above 1s duration
      6.1.1 Test apparatus
      6.1.2 Test conditions
      6.1.3 Test mixture
      6.1.4 Reference test
  6.2 Test set-up for ignition tests with pulsed radiation
      6.2.1 Single pulses below 1 ms duration
      6.2.2 Tests for pulse trains and pulses between 1 ms
            and 1 s duration
  6.3 Safety factor
7 Marking
  7.1 General
  7.2 Marking Information
  7.3 Examples of marking
Annex A (Informative) Reference test data
Annex B (informative) Ignition mechanisms
Annex C (normative) Ignition hazard assessment
Annex D (informative) Typical optical fibre cable design
Annex E (informative) Literature