10. Report
10.1 Report the procedure used, that is, Procedure A or Procedure B.
10.2 Report the "percentage of water in the oil", (Note 3) "total millilitres of free water" (Note 4) and the "millilitres of emulsion" separated by centrifuging, for each determination and the average of each observation for all determinations. These are necessary factors in determining the demulsibility characteristics of a lubricating oil.
NOTE 3 - Percent water in oil, record water present in amounts less than 0.1 % as <0.1 % or "trace".
NOTE 4 - The "total millilitres of free water" is the sum of the millilitres of free water collected in the 50-mL graduated cylinder (8.4) and the millilitres of free water separated by centrifuging (8.6).
11. Precision for Procedure A
11.1 The precision for Procedure A does not use the matrix of laboratories and samples required by RR: D02 - 1007. The following criteria should be used for judging the acceptability of results (95 % confidence). This precision statement is based on results obtained by seven laboratories on three oils and is applicable to oils with viscosity grades ranging from ISO 220 to ISO 460 (1000 SUS to 2000 SUS of 100°F).
11.1.1 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:
Total free water, mL 4.0
Emulsion, mL 0.2
11.1.2 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:
Total free water, mL 8.0
Emulsion, mL 0.3
12. Precision for Procedure B
12.1 The precision for Procedure B is based on results of cooperative tests from 13 laboratories on six laboratory-blended extreme-pressure lubricating oils. Test results, descriptions of the oils and analysis of data from this interlaboratory test program may be obtained from ASTM International Headquarters. The test oils were classified in three groups with respect to level of demulsibility as measured by this test method - A, B and C - and precision data were developed for each classification. Classification groups and limits, and precision data are shown in Table 1.
12.1.1 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 values shown in Table 1 only in one case in twenty.
12.1.2 Reproducibility - The difference between single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, exceed the values shown in Table 1 only in one case in twenty.
13. Bias
13.1 The procedure in Test Method D2711 has no bias because the values of total free water and emulsion can be defined only in terms of a test method.
14. Keywords
14.1 demulsibility; water contamination; water/oil separation