15. Report
15.1 Report the test method number and the procedure used (Procedure A or B).
15.2 For Procedure A:
15.2.1 Weight of insoluble material in milligrams, and
15.2.2 Weight of total copper in oil, water, and insolubles in milligrams.
15.2.3 When a rating of the corrosion of the catalyst metals is desired, the system as described in Appendix X2 can be used.
15.2.4 Acid number at end of test in mg KOH/g and test method used for the determination (optional).
15.3 For Procedure B:
15.3.1 Weight of insoluble material in milligrams.
15.3.2 Acid number at end of test in mg KOH/g and test method used for the determination (optional).
16. Precision and Bias
16.1 Precision - The precision of the test method for the weight of insoluble material (sludge) and for the weight of total copper in oil, water, and insoluble material (sludge) as obtained by the technical examination of interlaboratory test results is as follows:
16.1.1 Repeatability - The difference between successive test results obtained by the same operator with the same apparatus under constant operating conditions on identical test materials, would, in the long run and in the normal and correct operation of the test method, exceed the following values only in 1 case in 20:
where: X denotes the mean value.
16.1.2 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 and in the normal and current operation of the test method, exceed the following values only 1 case in 20:
where: X denotes the mean value.
16.2 This precision statement was prepared with data on four new (unused) mineral oil-based steam turbine lubricants and four new (unused) mineral oil based anti-wear hydraulic oils. These oils gave the following range of results:
16.2.1 Insoluble Material (sludge) - 4.6 to 250 mg.
16.2.2 Total Copper - 0.9 to 390 mg.
16.3 Bias - The procedure in Test Method D4310 has no bias, because the values of weight of insoluble material and weight of total copper in oil, water, and insolubles are defined only in terms of this test method.
17. Keywords
17.1 antiwear hydraulic oils; circulating oils; copper; corrosion; hydraulic oils; inhibited mineral oils; insoluble material; metal catalysts; oxidation; sludge; steam turbine lubricants; turbine oils