Standard Practice for Calibration of the James Static Coefficient of Friction Machine

Importancia y uso:

5.1 This practice is used to calibrate the James Machine for determination of static coefficient of friction of polish surfaces in accordance with Test Method D2047. Over considerable time and repeated use the James Machine may tend to mechanical misalignment, giving self-evident, anomalous readings. The periodic accumulation and comparison of data generated by this practice provides an indication of when the machine is no longer within the calibration limits and can no longer be expected to provide accurate and reliable data.

5.2 Semi-automated James machines may perform an internal calibration/alignment test. These automated tests should be routinely run per the manufacturer's recommendation. If the repeatability tests of this practice indicate that the machine is out of calibration, the manufacturer should be contacted and their suggestions followed. Unqualified disassembly, modification, or adjustment may void the instrument warranty of semi-automated James Machines.

Subcomité:

D21.06

Referida por:

D2047-17

Volúmen:

15.04

Número ICS:

19.060 (Mechanical testing), 61.060 (Footwear)

Palabras clave:

Borco board; control polish; James Machine; reference interface; SCOF chart; slip resistance; standard reference leather; standard test sequence; static coefficient of friction;