BS 5786-1:1979

National foreword
Cooperating organizations
Section One - General
1. Scope
2. Object
3. Terminology
Section Two - General requirements for tests
4. Test conditions
Section Three - Methods of test
5. Visual examination
6. Dimensions and effective angle of rotation
7. Capacitance
8. Blacklash
9. Tangent of the loss angle
10. Insulation resistance
11. Voltage proof
12. Rotor contact resistance
13. Temperature coefficient
14. Capacitance drift
15. Operating torque
16. Locking
17. Locking torque proof
18. End stop torque
19. Thrust and pull (axial)
20. Side thrust
21. Robustness of terminations
22. Rapid change of temperature
23. Soldering
24. Impact
25. Vibration
26. Climatic sequence
27. Damp heat (steady state)
28. Corrosion
29. Endurance
30. Sealing (normal conditioning)
31. Sealing (extended conditioning)
32. Capacitance drift after adjustment

Lists of methods of test for variable capacitors according to their type, dielectric, style and application.

This recommendation relates to variable capacitors intended for use in electronic equipment and gives the terms and methods of test which may be applied.

The capacitors are divided according to their type (function), dielectric, style and application as defined in Sub-clauses 3.8, 3.9 and 3.10.

Separate “Type specifications?? will give the specific test and requirements which are applicable to each type and grade of capacitor and detail specifications for a particular range of capacitors will be prepared in accordance with the relevant “Type specification??.