SN EN 140100 : 2008

1 Scope
2 Preferred characteristics, ratings and severities
    for environmental and overload tests
    2.1 Characteristics
          2.1.1 Climatic severities (IEC 115-2 clause 2.1.1)
          2.1.2 Temperature characteristics and temperature
                  coefficients of resistance (IEC 115-2 clause
                  2.1.1)
          2.1.3 Limits for change in resistance
    2.2 Preferred value ratings
          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 Limit for insulation resistance
          2.2.6 Insulation voltage
    2.3 Severities for environmental and overload tests
          2.3.1 Drying
          2.3.2 Vibration
          2.3.3 Low air pressure
          2.3.4 Overload
    2.4 Information to be specified in a detail
          specification
          2.4.1 Style
          2.4.2 Rated dissipation
          2.4.3 Limiting element voltage
          2.4.4 Isolation voltage
          2.4.5 Dimensions
          2.4.6 Resistance range
          2.4.7 Tolerances on rated resistance
          2.4.8 Climatic category
          2.4.9 Vibration severity
          2.4.10 Low air pressure severity
          2.4.11 Limits of resistance change after 1000 h
                  endurance test
          2.4.12 Temperature characteristic of resistance
          2.4.13 Derating curve
          2.4.14 Marking
          2.4.15 Ordering information
          2.4.16 Additional information (not for inspection
                  purposes)
3 Inspection
    3.1 Formation of inspection lots
          3.1.1 General
          3.1.2 Lot-by-lot testing
          3.1.3 Periodic testing
    3.2 Test methods
    3.3 Qualification approval
    3.4 Qualification approval procedures for enhanced
          assessment of quality
          3.4.1 General
          3.4.2 Distribution of values for Qualification
                  Sample
    3.5 Assessed process average procedures
    3.6 Delayed delivery
Annex
A.1 Fixed sample size qualification approval test
          schedule for fixed low power non-wire wound
          resistors
A.2 Fixed sample size qualification approval test
          schedule for fixed low power non-wire wound
          resistors under the procedures for the enhanced
          assessment of quality
Table
Table 1: Percentage change in resistance
Table 2: Limits of change in resistance