ASTM D8047 Standard Test Method for Evaluation of Engine Oil Aeration Resistance in a Caterpillar C13 Direct-Injected Turbocharged Automotive Diesel Engine
12. Report
12.1 For reference-oil results, use the standardized report form set available from the ASTM TMC and data dictionary for reporting test results and for summarizing operational data.
NOTE 9 - Report the non-reference-oil test results on these same forms if the results are intended to be submitted as candidate oil results against a specification.
12.1.1 Fill out the report forms according to the formats shown in the data dictionary.
12.1.2 Transmit results to the TMC within five working days of test completion.
12.1.3 Transmit the results electronically as described in the ASTM Data Communications Committee Test Report Transmission Model (Section 2 - Flat File Transmission Format) available from the ASTM TMC. Upload files via the TMC's website.
12.2 Report all reference-oil test results, whether aborted, invalidated, or successfully completed, to the TMC.
12.3 Deviations from Test Operational Limits - Report all deviations from specified test operational limits.
12.4 Precision of Reported Units - Use the Practice E29 rounding-off method for critical pass/fail test result data. Report the data to the same precision as indicated in data dictionary.
12.5 In the space provided, note the time, date, test hour, and duration of any shutdown or off-test condition. Document the outcome of all prior reference-oil tests from the current calibration sequence that were operationally or statistically invalid.
12.6 If a calibration period is extended beyond the normal calibration period length, make a note in the comment section and attach a written confirmation of the granted extension from the TMC to the test report. List the outcomes of previous runs that may need to be considered as part of the extension in the comment section.
13. Precision and Bias
13.1 Precision:
13.1.1 Test precision is established on the basis of operationally valid reference-oil test results monitored by the TMC.
13.1.2 Intermediate Precision Conditions - Conditions where test results are obtained with the same test method using the same test oil, with changing conditions such as operators, measuring equipment, test stands, test engines, and time.
NOTE 10 - Intermediate Precision is the appropriate term for this test method, rather than repeatability, which defines more rigorous within-laboratory conditions.
13.1.2.1 Intermediate Precision Limit (i.p.) - The difference between two results obtained under intermediate precision conditions that in the long run, in the normal and correct conduct of the test method, exceed the value shown in Table 5 in only one case in twenty. When only a single test result is available, the intermediate precision limit can be used to calculate a range (test result plus/minus intermediate precision limit) outside of which a second test result would be expected to fall about one time in twenty.
13.1.3 Reproducibility Conditions - Conditions where test results are obtained with the same test method using the same test oil in different laboratories with different operators using different equipment.
13.1.3.1 Reproducibility Limit (R) - The difference between two results obtained under reproducibility conditions that would, in the long run, in the normal and correct conduct of the test method, exceed the values in Table 5 in only one case in twenty. When only a single test results is available, the reproducibility limit can be used to calculate a range (test result plus/minus reproducibility limit) outside of which a second test result would be expected to fall about one time in twenty.
13.1.4 The test precision for the COAT as of February 10, 2016 is shown in Table 5. The TMC updates precision data frequently, and this information can be obtained by contacting the TMC.
13.2 Bias - Bias is determined by applying an accepted statistical technique to reference-oil test results and, when a significant bias is determined, a severity adjustment is permitted for non-reference-oil test results (refer to the TMC for details).
14. Keywords
14.1 automotive; Caterpillar C13; COAT; diesel engine oil; heavy-duty diesel engine; lubricants; oil aeration
