Document ID: chunk:federal_register_of_legislation:F2018C00339:body:0:p14
Version: federal_register_of_legislation:F2018C00339
Segment Type: other
Provision Reference: 
Character Range: 40981–43917

system, such that the effect if any is to slightly increase the energy flow rate to and from the remaining brake sub-systems.
         15.2.3.                          The energy required to actuate the substitute brake actuators to their maximum design level is less.
15.3.                                Where a trailer 'Brake System' is required to be tested for compliance with clauses 6.3 and 6.4 in the case of compressed air 'Brake System', the test rig described in Figure 3 must be calibrated in accordance with clause 15.4 and connected as described in Figure 4.
15.4.                                The test rig described in Figure 3 must be calibrated by adjustment of the orifice (O) such that; upon application of the brake control valve (V) with the storage reservoir (R1) charged to 1.0 'E' (650 kPa), the time interval is between 0.18 and 0.22 seconds from when the initial pressure drops measured between the storage reservoir and the control valve (V), or the initial pressure rises at the output of brake control valve (V), to when the pressure at the end of the calibrating vessel (R2) increases to 0.65 'E' (420 kPa).
15.5.                                Where a rear service coupling for towed trailers is provided, time responses must be measured with an 800-millilitre vessel attached to the rear service coupling as in Figure 4.
15.6.                                The test rig and the trailer energy storage devices must be charged to 1.0 'E' (650 kPa) prior to the test being conducted and no additional energy must be added to the storage vessel (R1) or the trailer 'Supply Line' during the period of the test.
15.7.                                The brake actuation time must be taken from when the pressure level, measured between the storage reservoir and the control valve (V) initially drops, or measured at the output of brake control valve (V)  initially rises to when the pressure in the least favoured brake actuator reaches 0.65 'E' (420 kPa).
15.8.                                With an initial service brake application level of 1.0 'E' (650 kPa) the brake release time must be taken from when the pressure level, measured between the control valve and the orifice, initially drops to the greater of when the pressure in the least favoured brake actuator reaches 0.05 'E' (35 kPa) or when the friction materials cease to contact each other.
15.9.                                The brake control valve must be of a configuration such that;
         15.9.1.                           it permits energy to flow from the storage reservoir to the orifice (O) when in the "ON" position and from the orifice to waste when in the "OFF" position; and,
         15.9.2.                           it must not allow additional energy to flow into the test rig 'Control Line' by way of its own 'Control Signal'; and
         15.9.3.                           it must be designed so that the manner of its