EB30-2R OPERATING INSTRUCTIONS Page 6
INTRODUCTION
The EB30-2R is a roller brake tester designed to perform VOSA MOT tests on
Class IV, Class V and Class VII vehicles.
Control can be performed using the remote handset at the vehicle so one man
operation is possible and a printer in the console will produce a record of results.
Description of system components
The roller brake tester consists essentially two parts: one above ground, the control
and display console and one below ground, the road simulation rollers. A brief
description of the various features follows:
Emergency switch
The brake tester is equipped with an emergency stop switch. Note the location of the
emergency stop before starting to use the equipment. The emergency switch is not
necessary positioned in the same place at every installation, check the location
before using the equipment.
Pit unit
The rolling road consists of two sets of free roller pairs connected by a chain and
indirectly driven by two electric motors through gearboxes. The gearbox is joined to
the roller tester frame by a force transducer. During the motor operation when the
car is braking, the resultant force is transmitted from the rollers to the brake force
transducer. The outputs of the transducers are monitored by the internal circuits and
eventually shown on the display as brake effort.
A small third roller is fitted between each pair of main rollers. These perform two vital
functions. Firstly to monitor the presence of a wheel in the rollers so that motors can
only be energised when a vehicle is present and secondly to measure speed of the
wheel that is being braked. This ensures that the motors are automatically switched
off when the tyre starts to slip on the roller surface.
