12.1 Report the following information
12.1.1 Unworked Penetration - Report the average value obtained in 11.1.2 as the unworked penetration of the grease under test.
12.1.2 Worked Penetration - Report the average value obtained in 11.2.1 as the worked penetration of the grease under test.
12.1.3 Prolonged Worked Penetration - Report the average value obtained in 11.3.1 as the prolonged worked penetration of the grease under test. The number of double strokes to which the grease was subjected during the prolonged working shall also be reported.
12.1.4 Block Penetration - Report the value obtained in 11.4.1 as the block penetration of the grease under test.
13. Precision and Bias
13.1 Precision - The precision of these test methods is based on work done by the Institute of Petroleum. Their precision evaluation is considered to conform to the requirements of Committee D-2, RR:D02-1007, Manual on Determining Precision Data for ASTM Test Methods on Petroleum Products and Lubricants.
13.2 The precision of these test methods as determined by
statistical examination of interlaboratory results is as follows:
13.2.1 Repeatability - The difference between two test 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 in Table 1 in only one case in twenty.
13.2.2 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, in the normal and correct operation of the test method, exceed the values in Table 1 in only one case in twenty.
13.3 Bias - The procedure in Test Methods D 217 for measuring cone penetration of lubricating greases has no bias because the value of cone penetration is defined only in terms of these test methods.
14.1 consistency; grease; lubricating grease; penetration; penetrometer; worked penetration