我单位使用一台LH-3型材料老化试验机,该机光源是由四对炭精组成。炭精相互接触或相距过远都不产生弧光,只有保持一定距离时才能放弧。由于弧光经常处于“起弧、灭弧”的交替状态,所以试件承受的光照时间与机器本身记录的工作时间并不一致。目前,材料老化试验已对光照时 Our unit uses an LH-3 material aging tester. The light source of this unit consists of four pairs of carbon fines. Carbons do not produce arcs when they are in contact with each other or in a distance from each other. Arcing can only occur when they are kept at a certain distance. Since the arc is often in an alternating state of “arcing and arc extinguishing,” the illumination time experienced by the specimen does not coincide with the working time recorded by the machine itself. At present, the material aging test is already in the light