Standard Test Method for Using a Variable Incidence Tribometer VIT

ASTM F 1679 Standard Test Method for Using a Variable Incidence Tribometer (VIT)  

Tribometry is a scientific field of measuring, interpretation, and studying friction. The ASTM procedure aims at determining the slip resistance of test surfaces to shoe material tested, such as a shoe sole, or related material (test feet) in either the laboratory or field under dry, wet, or contaminated conditions. The ASTM test does not mention static coefficient of friction (see above). It is described recording of the slip index directly from the protractor scale. 

Unlike James machine (see above), the English XL tribometer does not rely on gravity, but is powered by a small carbon dioxide cartridge at a set pressure (see 

The English XL Variable Incidence Trihometer (VIT) or the slipmeter (weight 

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