Guarding and safety
Primary operational safety of chassis dynamometer operators is achieved by restrict- ing human access to machinery while it is rotating. Access to the pit should be hardwire interlocked with the EM stop system and latched EM stop buttons posi- tioned in plant areas remote from the control room, such as the drive room and cell extremities.
The small exposed segment of dynamometer rolls on which the tyres rotate is the most obvious hazard to operators and drivers when the rig is in motion and personnel guards must always be fitted. Such guards are a standard part of the dynamometer system for good safety reasons, but perhaps also because it is the only operational piece of the manufacture’s equipment that is visible to the visitor after installation and usually will bear the company logo. Cover plates for the rolls for use when the vehicle is present are also advisable, particularly to prevent surface damage during maintenance periods.