14. Report
14.1 Total weight of insoluble materials in milligrams.
14.2 Change in acid number (AN).
14.3 Percent increase in viscosity at 40°C.
14.4 Report the varnishing in accordance with one of the classifications listed in Table 1.
15. Precision and Bias
15.1 The precision of this test method as determined by statistical examination of interlaboratory results is as follows:
15.2 Repeatability - The difference between two single and independent 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:
15.3 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, in the normal and correct operation of the test method, exceed the following values only in one case in twenty:
15.4 Bias - The procedure in this test method for measuring oxidation life of an oil has no bias because the value of the oxidation life is defined only in terms of this test method.
15.5 In the case of pass/fail data, no generally accepted method for determining precision or bias is currently available.
16. Keywords
16.1 high temperature fluid stability test; oils-lubricating; oxidation stability; turbine oil; universal oxidation test