EN 181000:1994

Foreword
SECTION ONE - GENERAL
1 General
  1.1 Scope
  1.2 Related documents
  1.3 Definitions
SECTION TWO - REQUIREMENTS
2 Requirements
  2.1 Classification
      2.1.1 Type
      2.1.2 Style
      2.1.3 Variant
      2.1.4 Climatic category
      2.1.5 Assessment level
  2.2 Minimum mandatory test sequence
  2.3 Documentation
      2.3.1 Symbols
      2.3.2 Specification system
               Blank detail specifications
               Detail specifications
      2.3.3 Drawings
               Projection system
               Dimensional system
               Intermountability
      2.3.4 Measurements
               Measurement method
               Reference components
               Gauges
      2.3.5 Test data sheets
      2.3.6 Instructions for use
  2.4 Design and construction
      2.4.1 Materials
      2.4.2 Workmanship
  2.5 Quality
  2.6 Performance requirements
  2.7 Identification and marking
      2.7.1 Variant identification number
      2.7.2 Component marking
      2.7.3 Package marking
  2.8 Packaging
  2.9 Ordering information
SECTION THREE - QUALITY ASSESSMENT PROCEDURES
3 Quality assessment procedures
  3.1 Primary stage of manufacture
  3.2 Structural similarity
  3.3 Qualification approval procedures
      3.3.1 Fixed sample procedure
      3.3.2 Lot-by-lot and periodic procedure
      3.3.3 Sample size
      3.3.4 Preparation of specimens
      3.3.5 Qualification testing
      3.3.6 Qualification failures
      3.3.7 Maintenance of qualification approval
      3.3.8 Qualification report
  3.4 Quality conformance inspection
      3.4.1 Lot-by-lot inspection
               Formation of inspection lots
               Rejected lots
      3.4.2 Periodic inspection
               Sample size
               Preparation of specimens
               Periodic inspection
               Periodic inspection failures
               Periodic inspection report
  3.5 Certified records of released lots
  3.6 Delayed deliveries
  3.7 Delivery release before completion of group B4
      tests
  3.8 Alternative test methods
  3.9 Unchecked parameters
SECTION FOUR - MEASUREMENT AND ENVIRONMENTAL TEST
                PROCEDURES
4 Measurement and environmental test procedures
  4.1 Standard condition
  4.2 Specimen
  4.3 Cleaning of optical surfaces
  4.4 Optical measurement conditions
  4.5 Measurement procedures
      4.5.1 Visual inspection
      4.5.2 Dimensions and mass
      4.5.3 Examination of product
      4.5.4 Flammability
      4.5.5 Insertion loss
      4.5.6 Return loss
      4.5.7 Wavelength dependence measurement
      4.5.8 Polarization dependence of the transfer matrix
      4.5.9 Change in transmitted optical power
      4.5.10 Maximum input power
  4.6 Environmental test procedures
      4.6.1 Vibration
      4.6.2 Effectiveness of fibre or ferrule retention
      4.6.3 Static load
      4.6.4 Pulling
      4.6.5 Torsion
      4.6.6 Strength of coupling mechanism
      4.6.7 Bending moment
      4.6.8 Bump
      4.6.9 Shock
      4.6.10 Crush resistance
      4.6.11 Axial compression
      4.6.12 Impact
      4.6.13 Acceleration
      4.6.14 Drop
      4.6.15 Coupling proof torque
      4.6.16 Mould growth
      4.6.17 Cold
      4.6.18 Dry heat
      4.6.19 Damp heat (steady state)
      4.6.20 Climatic sequence
      4.6.21 Condensation
      4.6.22 Change of temperature
      4.6.23 Sealing (sealed branching devices)
      4.6.24 Sealing (water immersion)
      4.6.25 Sealing (hermetic)
      4.6.26 Salt mist
      4.6.27 Dust
      4.6.28 Industrial atmosphere (sulphur dioxide)
      4.6.29 Low air pressure
      4.6.30 Solar radiation
      4.6.31 Nuclear radiation
      4.6.32 Mechanical endurance
      4.6.33 High temperature endurance
      4.6.34 Resistance to solvents and contaminating fluids
      4.6.35 Cable Nutation
Annex A (Informative) Examples of fibre optic branching
                      device types
Annex B (Informative) Size measurements
Annex C (Informative) Summary of definitions from IEC Publications

This specifiation is applicable to fibre optic brancing devices. These have all of the following general features:- they are passive in that they contain no optoelectronic or other transducing elements;- they have three or more ports for the ingress and/or egress of optical power and share optical power among these ports in a predetermined fashion;- the ports are optical fibres or optical fibre connectors.In this generic specification, fibre optic branching devices are classified by wavelength dependance into two sub-families; wavelength selective devices and non-wavelength selective devices, each of which will be covered by a seperate blank detail specification.