BS CECC 41100:1978

Foreword
Preface
Section 1 - Scope
Section 2 - Preferred characteristics, ratings and
            severities for environmental tests
2.1 Characteristics
2.1.1 Climatic severities
2.1.2 Temperature characteristics and temperature
        coefficients of resistance
2.1.3 Limits for change in resistance, or output ratio
2.1.4 Limits for insulation resistance
2.1.5 Total mechanical travel
2.2 Ratings
2.1.6 Limit for contact resistance
2.2.1 Rated resistance
2.2.2 Tolerances on rated resistance
2.2.3 Rated dissipation
2.2.4 Limiting element voltage
2.2.5 Isolation voltage
2.3 Severities for environmental tests
2.3.1 Drying
2.3.2 Vibration
2.3.3 Bump
2.3.4 Shock
2.3.5 Low air pressure
2.3.6 Change of temperature
2.3.7 Soldering
2.4 Derating curve
2.5 Information to be given in a detail
        specification
2.5.1 Style
2.5.2 Rated dissipation
2.5.3 Limiting element voltage
2.5.4 Isolation voltage
2.5.5 Resistance law
2.5.6 Dimensions
2.5.7 Resistance range
2.5.8 Tolerances on rated resistance
2.5.9 Temperature characteristics of resistance
2.5.10 Climatic category
2.5.11 Vibration severity
2.5.12 Bump severity
2.5.13 Shock severity
2.5.14 Low air pressure severity
2.5.15 Soldering
2.5.16 Limits of resistance change after 1 000 h
        electrical endurance test
2.5.17 Starting torque
2.5.18 End-stop torque
2.5.19 Total mechanical travel
2.5.20 Limiting slider current
2.5.21 Terminal resistance and, where applicable,
        minimum effective resistance
2.5.22 Derating curve
2.5.23 Marking
2.5.24 Ordering information
2.5.25 Contact resistance
2.5.26 Additional information
Section 3 - Inspection
3.1 Formation of inspection lots
3.2 Delayed delivery
3.3 Test methods
3.4 Qualification approval

Ratings, characteristics and inspection requirements.