Division 9.1.1 Shaft work

An engine dynamometer shall be used that has adequate characteristics to perform the applicable duty cycle including the ability to meet appropriate cycle validation criteria. The following dynamometers may be used:

1. (a)

   Eddy-current or water-brake dynamometers;

2. (b)

   Alternating-current or direct-current motoring dynamometers;

3. (c)

   One or more dynamometers.