IEC 60216-6:2006

FOREWORD
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
   3.1 Terms, abbreviations and definitions
   3.2 Symbols and abbreviated terms
4 FTFM protocol
   4.1 Principles and Objectives
5 TI determination
   5.1 Ageing procedures
   5.2 Ageing times and temperatures
   5.3 Test specimens
   5.4 Diagnostic tests
   5.5 Selection of end-points
   5.6 Establishment of initial property value
   5.7 Ageing conditions
   5.8 Procedure for ageing
6 Calculation procedures
   6.1 General principles
   6.2 Precision of calculations
   6.3 Derivation of temperatures equivalent to property
        values
   6.4 Regression analysis (temperature on time)
   6.5 Statistical tests
   6.6 Thermal endurance graph
7 Calculation and requirements for results
   7.1 Calculation of thermal endurance characteristics
   7.2 Reporting of results
8 Report
9 RTE determination
   9.1 Objectives of RTE determination
10 Additional symbols
11 Experimental procedures
   11.1 Selection of control material
   11.2 Selection of diagnostic test for extent of ageing
   11.3 Ageing procedures
12 Calculation procedures
   12.1 General principles
   12.2 Input data
   12.3 RTE
   12.4 Confidence limits
   12.5 Extrapolation
13 Results and report
   13.1 Results of statistical and numerical tests
   13.2 Result
   13.3 Report
Annex A (normative) Decision flow chart
Annex B (normative) Decision table
Annex C (informative) Statistical tables
Annex D (informative) Suggested ageing times and temperatures
Annex E (informative) Figures
Annex F (normative) Statistical significance of the difference
                    between two regression estimates
Annex G (informative) Computer programs for IEC 60216-6

Specifies the experimental and calculation procedures for deriving the thermal endurance characteristics, temperature index (TI) and relative thermal endurance index (RTE) of a material using the "fixed time frame method (FTFM)". In this protocol, the ageing takes place for a small number of fixed times, using the appropriate number of ageing temperatures throughout each time, the properties of the specimens being measured at the end of the relevant time interval. This differs from the procedure of IEC 60216-1, where ageing is conducted at a small number of fixed temperatures, property measurement taking place after ageing times dependent on the progress of ageing. The diagnostic tests employed in the fixed time frame method are restricted to destructive tests. The method has not as yet been applied to non-destructive or proof test procedures. Both the TI and the RTE determined according to the FTFM protocol are derived from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2 as modified in this standard. The calculation procedures and statistical tests are modified from those of IEC 60216-3 and IEC 60216-5. The significant technical changes with respect to the previous edition are as follows. - This new edition has been supplemented by Annex G and the corresponding software.