ASTM D4809 Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter (Precision Method)
12. Report
12.1 Net heat of combustion is the quantity required in practical applications. Both gross and net heat are reported to the nearest 0.002 MJ/kg.
13. Precision and Bias
13.1 Precision - The precision of this test method as determined by the statistical examination of interlaboratory test results is as follows.
13.1.1 Repeatability - The difference between successive results obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long run, in the normal and correct operation of the test method, exceed the following values only in one case in twenty.
13.1.2 Reproducibility - The difference between two single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, exceed the following values only in one case in twenty.
13.2 Bias - The bias of the procedure in this test method as determined by the statistical examination of interlaboratory test results is as follows:
14. Keywords
14.1 aviation turbine fuels; bomb calorimeter; heat of combustion; hydrocarbon fuels