BS 9090:1977

Foreword
Cooperating organizations
Specification
1. PRINCIPLES AND MANDATORY PROCEDURES
1.1 GENERAL MATTERS
1.1.1 Scope
1.1.2 Related documents
1.1.3 Terminology
1.1.4 Letter symbols, signs and abbreviations
1.1.5 Graphical symbols
1.1.6 Marking of the component and the package
1.1.7 Eligibility for qualification approval
1.1.8 Structurally similar components
1.1.9 Delayed delivery
1.1.10 Supplementary procedure for qualification
          approval
1.1.11 Certified test records
1.1.12 Standard ratings and characteristics
1.1.13 Unchecked parameters
1.1.14 Procedure to be followed in the event of failure
          at group C or D inspection
1.1.15 Ordering information
1.1.16 Release before completion of group B inspection
1.2 TEST PROCEDURES
1.2.1 Measurement conditions
1.2.2 Visual examination
1.2.3 Outline drawing and dimensions
1.2.4 Electrical test procedures
1.2.4.1 Capacitance
1.2.4.2 Backlash
1.2.4.3 Tangent of the loss angle
1.2.4.4 Insulation resistance
1.2.4.5 Voltage proof
1.2.4.6 Rotor contact resistance
1.2.4.7 Temperature coefficient
1.2.4.8 Capacitance drift
1.2.4.9 Capacitance drift after adjustment
1.2.5 Mechanical test procedures
1.2.5.1 Operating torque
1.2.5.2 Locking
1.2.5.3 Locking torque proof
1.2.5.4 End stop torque
1.2.5.5 Thrust and pull (axial)
1.2.6 Environmental test procedure
1.2.6.1 Robustness of terminations
1.2.6.2 Soldering
1.2.6.3 Bump
1.2.6.4 Shock
1.2.6.5 Vibration
1.2.6.6 Rapid change of temperature
1.2.6.7 Climatic sequence
1.2.6.8 Damp heat (steady state)
1.2.6.9 Sealing (normal conditioning)
1.2.6.10 Sealing (extended conditioning)
1.2.6.11 Sealing (100% tests)
1.2.7 Endurance tests
1.2.7.1 Endurance (mechanical)
1.2.7.2 Endurance (electrical)
2. GENERAL RULES FOR THE PREPARATION OF DETAIL
          SPECIFICATIONS
2.1 BASIC INFORMATION RELATING TO ALL DETAIL
          SPECIFICATIONS
2.1.1 Originator of the detail specification
2.1.2 Detail specification number
2.1.3 Description of the component and intended
          application
2.1.4 Outline drawing
2.1.5 Ratings (including limiting conditions of use)
2.1.6 Characteristics
2.1.7 Related documents
2.1.8 Additional information
2.1.9 Instructions for ordering components
2.2 INSPECTION REQUIREMENTS
2.3 CERTIFIED TEST RECORDS
2.3.1 General
2.3.2 Attributes information
2.3.3 Measurements information
Appendices
A. Text deleted
B. Example of a typical certified test record
C. Recommended scheme for the inspection of
     structurally similar components
Figures
1. Method of establishing zero capacitance
2. Typical apparatus

The test methods and general information are prescribed or used in the associated rules documents and detail specifications in the BS 9000 series.