ASTM D8047 Standard Test Method for Evaluation of Engine Oil Aeration Resistance in a Caterpillar C13 Direct-Injected Turbocharged Automotive Diesel Engine
9. Engine/Stand Calibration and Non-Reference-Oil Tests
9.1 Annex A9 describes calibration procedures using the TMC reference oils, including their storage and conditions of use, the conducting of tests, and the reporting of results.
9.2 Annex A10 describes maintenance activities involving TMC reference oils, including special reference-oil tests, special use of the reference-oil calibration system, donated reference-oil test programs, introducing new reference oils, and TMC information letters and memoranda.
9.3 Annex A11 provides information regarding new laboratories, the role of the TMC regarding precision data, and the calibration of test stands used for non-standard tests.
9.4 Stand Calibration:
9.4.1 Calibrate the test stand by conducting a test with a blind reference oil (see A9.2). Submit the results to the TMC as described in A9.6. Determine the acceptability of a reference-oil test according to the LTMS.
9.4.2 New Test Stand - Anew test stand is one that has never been calibrated or has not completed an acceptable reference-oil test within 24 months of the end of test (EOT) date of the last acceptable reference-oil test. Perform a calibration as described in 9.4.1 to introduce a new test stand.
9.4.3 Stand-Calibration Period - The calibration period is 6 months and a certain number of operationally valid non-reference-oil tests, whichever comes first, from the EOT date of the last acceptable reference-oil test. The number of non-reference-oil tests allowed during a calibration period is determined by the number of reference-oil tests that have been completed on a test stand. The first calibration period on a new stand is six months or two non-reference-oil tests, whichever comes first. The second calibration period on a stand is six months or four non-reference-oil tests. The third calibration period on a stand is six months or six tests. The fourth and all subsequent calibration periods on a test stand is six months or nine tests.
9.4.4 Stand Modification and Calibration Status - Stand-calibration status will be invalidated by conducting any non-standard test or modification of the test and control systems, or both. A non-standard test is any test conducted under a modified procedure, or using non-procedural hardware, or using controller-set-point modifications, or any combination thereof. Any such changes terminate the current calibration period. A reference test is required before restarting the current calibration period (see A9.2.2). If changes are contemplated, contact the TMC beforehand to ascertain the effect on the calibration status.
9.5 Test-Numbering System:
9.5.1 The test number for both reference and non-reference oils has three parts: X, Y, and Z, where X represents the test-stand number, Y the sequential test-stand-run number, and Z the number of hours run on the stand since the last reference-oil test. For example 27-15-150 indicates run number 15 on test-stand number 27, the test stand having been run for 150 h since the last reference-oil test. The test stand run number, Y, will increase sequentially by one for each test start (reference oil or non-reference oil). A letter suffix may also be necessary (see 9.5.2).
9.5.2 A reference-oil test conducted subsequent to an unacceptable reference-oil test shall include a letter suffix after Y. The letter suffix shall begin with A and incremented alphabetically until acceptable reference-oil test is completed. For example, if two consecutive unacceptable reference-oil tests were conducted and the first number was 27-15-150, the second test number would be 27-16A-150. A third calibration attempt would have the test number 27-17B-150. If the third test were acceptable, then 27-17B-150 would identify the reference-oil test in the test report.
9.5.3 Non-Reference-Oil Tests - Add no letter suffix to Y for aborted or operationally invalid non-reference-oil tests.
9.6 Reference-Oil Tests - Carry out reference-oil tests as described in A9.5 and report the results to the TMC as described in A9.6. Determine the acceptability of a reference-oil test according to the LTMS.
9.7 Non-Reference-Oil Tests: Last Start Date - When running non-reference-oil tests during the calibration period, crank the engine prior to the expiration of the calibration period (9.4.3).
