Adjustment and calibration Clause Samples
The "Adjustment and calibration" clause defines the procedures and responsibilities for ensuring that equipment or systems are properly set and maintained to meet specified standards or performance criteria. Typically, this clause outlines how and when adjustments or calibrations should be performed, who is responsible for carrying them out, and the documentation required to verify compliance. Its core practical function is to ensure that all relevant equipment operates accurately and reliably, thereby minimizing errors and maintaining quality control throughout the contract period.
Adjustment and calibration. To perform the headform test the phantom head is fixed to the cross arm of the guide system (Figure 2.2) and moved to the required drop height by means of a lifting device. During the headform test the cross arm with the phantom head is released. After passing the height adjustable light barrier the phantom head is released from the cross arm, the cross arm's fall is dampened and the phantom head falls onto the sample. No impulse may be given to the phantom head by the drop appliance or by the measuring cable, so that it is accelerated only by gravity and falls vertically.
Adjustment and calibration. To perform the headform test the phantom head is fixed to the cross arm of the guide system (figure 2.2) and moved to the required drop height by means of a lifting device. During the headform test the cross arm with the phantom head is released. After passing the height adjustable light barrier the phantom head is released from the cross arm, the cross arm's fall is dampened and the phantom head falls onto the sample. No impulse may be given to the phantom head by the drop appliance or by the measuring cable, so that it is accelerated only by gravity and falls vertically. Release device Drop body (phantom head) Guide system Light barrier Dampers Mount for sample
Adjustment and calibration. To perform the headform test the phantom head is fixed to the cross arm of the guide system (figure 2.2) and moved to the required drop height by means of a lifting device. During the headform test the cross arm with the phantom head is released. After passing the height adjustable light barrier the phantom head is released from the cross arm, the cross arm's fall is dampened and the phantom head falls onto the sample. No impulse may be given to the phantom head by the drop appliance or by the measuring cable, so that it is accelerated only by gravity and falls vertically. E/ECE/324 Rev.1/Add.42/Rev.1/Amend.1 Regulation No. 43
3.2.2.1. Measuring device which allows to determine HIC-values with the headform described under paragraph 3.2.1.
3.2.2.2. Equipment to calibrate the phantom head. The drop appliance must allow drop heights between 50 mm and 254 mm to be adjusted exactly to within 1 mm. A guide system is not necessary for these small drop heights. A steel impact plate which is made of steel is 600 mm x 600 mm in size and at least 50 mm thick. The impact surface must be polished: surface roughness Rmax = 1 9m, flatness tolerance t = 0.05 mm.
3.2.2.3. Calibration and adjustment of the phantom head Before each test series and no later than each 50 tests within a series, the phantom head must be calibrated and adjusted if necessary. The impact plate must be clean and dry and during the test must lie non-positively on a concrete base. The phantom head is allowed to hit the impact plate vertically. The drop heights (measured from the lowest point of the phantom head to the surface of the impact plate) are 50, 100, 150 and 254 mm. The deceleration curves should be recorded. The greatest deceleration az from the various drop heights on the z-axis must lie within the limits given in the table: Drop height mm Greatest deceleration az as acceleration due to gravity a g multiple of 50 64 ± 5 100 107 ± 5 150 150 ± 7 254 222 ± 12 The deceleration curves should be based on a unimodel vibration. The deceleration curve of the drop height of 254 mm must run at least 1.2 ms and at most 1.5 ms over 100 g. If the requirements given in paragraph 3.2.2.3. are not met, the elastic properties of the phantom head must be adjusted by varying the thickness of the intermediate ring (13) in the base plate (24). Corrections can be carried out by adjusting the three self-locking E/ECE/324 Rev.1/Add.42/Rev.1/Amend.1 Regulation No. 43 page 23 hexagonal nuts (8) on the threaded bolts ...