ASTM D1403 Standard Test Methods for Cone Penetration of Lubricating Grease Using One-Quarter and One-Half Scale Cone Equipment
10. Report
10.1 Do not report the actual penetration values from the 1/4-scale or the 1/2-scale cone equipment (unless specified by the user). Report only the calculated values from the conversion equations in 9.1.1 and 9.1.2.
11. Precision and Bias
11.1 Precision - The precision of these test methods is not known to have been obtained in accordance with currently accepted guidelines (for example, in Committee D-2 research report RR:D2-1007, "Manual on Determining Precision Data for ASTM Methods on Petroleum Products and Lubricants"). The precision of these test methods as determined by statistical examination of interlaboratory results is as follows:
11.1.1 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 these test methods, exceed the values in Table 1 in only one case in twenty.
11.1.2 Reproducibility - The difference between two single and independent test 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 methods, exceed the values in Table 2 in only one case in twenty.
11.2 Bias - Because there is no accepted reference material suitable for determining bias for the procedure in these test methods for measuring cone penetration of lubricating grease by one-quarter and one-half scale equipment, bias cannot be determined.
12. Keywords
12.1 consistency; grease; lubricating grease; penetration; penetration; 1/4-scale; penetration; 1/2-scale; penetrometer; worked penetration; unworked penetration