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PD IEC/TR 60493-3:2017 Guidelines for the statistical analysis of ageing test data - Minimum specimen numbers at different test conditions with given experimental data, 2017
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- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, symbols and conventions [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols
- 3.3 Conventions
- 4 Assumptions
- 5 General considerations
- Figures [Go to Page]
- Figure 1 – Ageing time versus survival ratio
- Figure 2 – Arrhenius plot of failure time or scatter
- 6 Probability calculation based on normal distributions [Go to Page]
- 6.1 General
- 6.2 Calculations
- Figure 3 – Temperature dependence of σ/t
- 6.3 Estimated life at 90 °C (temperature difference is set to be 40 °C) [Go to Page]
- 6.3.1 Ideal case with σ = 0,05, 0,1, 0,2, 0,3
- 6.3.2 Test sample numbers of 20, 10, 5, 3 with σ = 0,05
- Figure 4 – Estimated life at 90 °C for the ideal case [Go to Page]
- 6.3.3 Test sample numbers of 20, 10, 5, 3 with σ = 0,3
- Figure 5 – Test sample numbers of 20, 10, 5, 3 with σ = 0,05
- 6.4 Estimated life at 50 °C (temperature difference is set to be 80 °C) [Go to Page]
- 6.4.1 Ideal case with σ = 0,05, 0,1, 0,2, 0,3
- Figure 6 – Test sample numbers of 20, 10, 5, 3 with σ = 0,3 [Go to Page]
- 6.4.2 Test sample numbers of 20, 10, 5, 3 with σ = 0,05
- Figure 7 – Estimated life at 50 °C for the ideal case [Go to Page]
- 6.4.3 Test sample numbers of 20, 10, 5, 3 with σ = 0,3
- Figure 8 – Test sample numbers of 20, 10, 5, 3 with σ = 0,05 [Go to Page]