Laboratory Viscosity Measurement of Thickened Aircraft Deicing/Anti-icing Fluids with a Viscometer AS9968A

DOI: https://doi.org/10.4271/AS9968A

Issuing Committee: G-12ADF Aircraft Deicing Fluids

Publisher: SAE International

Pages: 9

Rationale: The scope of the standard has been expanded to allow other important uses aside from field verification and auditing purposes. A number of editorial and organizational revisions were also made. The expanded scope allows the standard to be used for AMS1428 conformance testing or for quality assurance purposes when measurement of viscosity using different spindles, or temperatures different from 20 °C or rotational speeds different from 0.3 rpm is required. At the same time the standard preserves the original methodology used for field verification and auditing purposes. New guidelines for reporting viscosity results make clearer that the results of independent measurements can only be compared when the same test parameters and conditions have been used. The word “Brookfield” has been removed from the title because alternate viscometers (different from the Brookfied LV model) will be allowed if the alternative viscometer demonstrates equivalent performance to the Brookfield LV. Section 3 was updated to include a significant amount of new content which has been divided into four new sections entitled: Summary of Test Method, Equipment and Test Parameters, Calibration of Test Equipment, and Testing of Samples. The contents of Sections 4 and 5 were revised and combined into a new section entitled Reporting. An appendix was added to provide addtional information and explanation of test parameters and conditions which have an effect on accuracy and precision of viscosity measurements.