Common use of Instrumentation and equipment Clause in Contracts

Instrumentation and equipment. Install the fifth wheel, when used, in accordance with the manufacturer’s specifications and locate it as near as possible to the mid-track position of the tow trailer or the tyre test vehicle. 4.2.7. Procedure 4.2.7.1. Test run The following procedure applies for each test run: 4.2.7.1.1. The tow vehicle or the tyre test vehicle is driven onto the test track in a straight line at the specified test speed (65 ± 2) km/h. 4.2.7.1.2. The recording system is launched. 4.2.7.1.3. For self-watering system, water shall be delivered to the pavement ahead of the test tyre approximately 0.5 s prior to brake application. 4.2.7.1.4. The brakes shall be activated within an area of six (6) meters in the longitudinal direction and 0.5 meters in the transversal direction of a measurement point of the wetted frictional properties of the surface and sand depth in accordance with paragraphs 3.1.4. and 3.1.5. above. The test shall be run in the same direction as in paragraph 3.2.2. of this Annex. The rate of braking application shall be such that the time interval between initial application of force and peak longitudinal force is in the range 0.2 s to 0.5 s. 4.2.7.1.5. The recording system is stopped. 4.2.7.2. Test cycle Within the same test cycle, each test run of each braking test shall be made from the same spot on the test track and in the same direction and in accordance with paragraph 4.2.7.1. of this Annex. Several test cycles may be performed consecutively, where the final braking test of the reference tyre set of a test cycle may serve as the initial braking test of the reference tyre set for the next test cycle. Up to three candidate tyres may be measured within the same test cycle, provided that the tests are completed within one day. 4.2.7.2.1. Initial braking test of the reference tyre set (Ri): first, the reference tyre set is mounted and at least six (6) valid test runs shall be made in accordance with paragraph 4.2.7.1. above. 4.2.7.2.2. Braking test of a candidate tyre set (Tn): the reference tyre set is replaced by a candidate tyre set and at least six (6) valid test runs with the candidate tyre set shall be performed. 4.2.7.2.3. After the braking test of the first candidate tyre set, up to two more candidate tyre sets may be measured. 4.2.7.2.4. Final braking test of the reference tyre set (Rf): the test cycle shall be closed by at least six (6) more valid test runs of the same reference tyre set as at the beginning of the test cycle. Examples: (a) The run order for a test cycle with three candidate tyre sets (T1 to T3) would be the following: Ri – T1 – T2 – T3 – Rf (b) The run order for a braking test (consisting of two test cycles) of five candidate tyre sets (T1 to T5) would be the following: Ri – T1 – T2 – T3 – Rf/Ri – T4 – T5 – Rf