ASTM D5275 Test Method for Fuel Injector Shear Stability Test (FISST) for Polymer Containing Fluids
12. Report
12.1 Report the following information:
12.1.1 Percentage viscosity loss as calculated in 11.1,
12.1.2 Kinematic viscosity of the unsheared oil at 100 °C,
12.1.3 Kinematic viscosity of the sheared oil at 100 °C,
12.1.4 Number of cycles,
12.1.5 For reference oil runs, the batch number of the reference oil, and
12.1.6 Specify this test method (ASTM D5275).
13. Precision and Bias
13.1 The following criteria should be used for judging the acceptability of results:
13.1.1 Repeatability - The difference between successive test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long run, and in the normal and correct operation of the test method, exceed the following value only in one case in twenty: 1.19 %.
13.1.2 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, and in the normal and correct operation of the test method, exceed the following value only in one case in twenty: 5.22 %.
NOTE 4 - The indicated repeatability and reproducibility values represent the subtractive difference between the reported percentage viscosity loss values for the two determinations being compared.
13.1.3 Bias - All test results are relative to those of Calibration Fluid TL-11074. Therefore no estimate of bias can be justified.
14. Keywords
14.1 VII; fuel injector; polymer containing fluids; shear stability
