ASTM D5001 Standard Test Method for Measurement of Lubricity of Aviation Turbine Fuels by the Ball-on-Cylinder Lubricity Evaluator (BOCLE)
9. Preparation of Apparatus
9.1 Use the following procedures, where applicable:
Annex A1 for the semi-automatic method.
Annex A2 for the fully automatic method.
10. Calibration and Standardization
10.1 Visually inspect test balls before each test. Discard balls that exhibit pits, corrosion, or surface abnormalities.
10.2 Reference Fluids:
10.2.1 Conduct three tests on each new batch of the reference fluids in accordance with Section 11 using a test ring previously standardized by reference fluid testing.
10.2.2 Repeat the three tests if the wear scar diameters differ by more than 0.04 mm for Reference Fluid A or by more than 0.08 mm for Reference Fluid B.
10.2.3 Reject the reference fluid concerned if the wear scar diameters for the repeat tests (10.2.2) again differ by more than the values obtained in 10.2.1.
10.2.4 Calculate the average wear scar for the three results that are within the values of 10.2.2 for the appropriate Reference Fluid.
10.2.5 Compare the average results with the following Reference Fluid values:
Reference Fluid A 0.56 mm average WSD
Reference Fluid B 0.85 mm average WSD
10.2.6 Reject the new Reference Fluid batch if the average results obtained at 10.2.4 differ by more than 0.04 mm for Reference Fluid A or by more than 0.08 mm for Reference Fluid B from the Reference Fluid values given in 10.2.5.
10.3 Test Ring Calibration:
10.3.1 Test each new ring with Reference Fluid A as per Section 11.
10.3.2 The ring is acceptable if the wear scar diameter result is within 0.04 mm WSD of the Reference Fluid A value shown in 10.2.5.
10.3.3 Repeat the test if the wear scar diameter does not agree within 0.04 mm WSD of the Reference Fluid A value shown in 10.2.5.
10.3.4 Reject the ring if the two values obtained in 10.3.1 and 10.3.3 differ by more than 0.04 mm WSD from each other or if both of the values differ by more than 0.04 mm WSD from the Reference Fluid A value shown in 10.2.5.
10.3.5 Test each new ring with Reference Fluid B as per Section 11.
10.3.6 The ring is acceptable if the wear scar diameter result is within 0.08 mm WSD of the Reference Fluid B value shown in 10.2.5.
10.3.7 Repeat the test if the wear scar diameter does not agree within 0.08 mm WSD of the Reference Fluid B value shown in 10.2.5.
10.3.8 Reject the ring if the two values obtained in 10.3.5 and 10.3.7 differ by more than 0.08 mm WSD from each other or if both of the values differ by more than 0.08 mm WSD from the Reference Fluid B value shown in 10.2.5.
NOTE 4 - The BOCLE test result is very sensitive to contamination of the reference fluids, test rings, balls and hardware.
