Document ID: chunk:federal_register_of_legislation:F2018C00339:body:0:p12
Version: federal_register_of_legislation:F2018C00339
Segment Type: other
Provision Reference: 
Character Range: 35346–38374

after not less than 20 successive applications, each not more than 70 seconds after the preceding one and with the total of 20 applications completed within 20 minutes, of the trailer 'Brakes' from an initial speed of V1 km/h to a final speed as calculated below or by clause 12.2, achieve a calculated 'Established Retardation Coefficient', when tested in accordance with part 10, at a nominated 'Control Signal' level, of not less than 60 percent of the value obtained at that 'Control Signal' level for the Service Brake Effectiveness Test required by part 10 nor less than 80 percent of the value specified by the lower boundary of Figure 1 at that 'Control Signal'  level. The nominated 'Control Signal' level chosen must not be less than that necessary to produce a calculated 'Established Retardation Coefficient' of 0.45 under the Service Brake test conditions described in part 10 without prior fade conditioning stops.
12.2.                                The final speed to which the trailer has to be successively braked as part of the brake fade conditioning procedure must be determined from the equation

          where:
          V1   is the initial speed in km/h;
          V 2   is the final speed in km/h;
          Masses and Loads in tonnes
         12.3   The temperature (100°C) requirement of clause 9.12 does not apply to the test required by clause 12.1.
13.                                      EMERGENCY BRAKE SYSTEM EFFECTIVENESS TEST
13.1.                                The 'Established Retardation Coefficient', as determined by clause 10.5 with must be determined by a test to the requirements of part 10 except where clause 13.2 applies, and except that:
         13.1.1.                           The 'Control Signal' source must be left in the "off" position with no 'Control Signal' being provided to the trailer control line; and
         13.1.2.                           The energy level in the 'Supply Line' must be reduced to zero (in a 2-line compressed air system this will be the emergency line).
13.2.                                Where the actuation of the 'Emergency Brake System' depends on one or more sources of 'Stored Energy' that are common to the 'Service Brake System', for the purposes of testing for compliance with the requirements of clause 13.1, the trailer energy storage devices must be charged to an energy level no greater than 0.05 'E' above the supply level determined for clause 5.5, or the energy storage device level if higher, at which the 'Emergency Brake System' commences to activate the 'Brakes'.
13.3.                                Wheel-locking at ERC above 0.18 is permitted.
14.                                      PARKING BRAKE EFFECTIVENESS TEST
14.1.                                The 'Parking Brake System 38/...' must be able to meet the requirements of clause 8.6 for a 5 minute period in each direction with the force required to actuate the parking brake not exceeding 685 N in the case of a foot operated brake and not exceeding 590 N