Method for the nondestructive quality testing of a thermocouple which can be used in particular at high temperatures and/or under high levels of vibration

摘要

In a method for the nondestructive quality testing of a thermocouple (10) which can be used in particular at high temperatures and/or under high levels of vibration, which thermocouple (10) comprises at least two wires (13, 14) which run substantially parallel to one another in one plane, are connected to one another at their ends by a welded joint (15), are surrounded by a hermetically sealed sheath (11) and inside the sheath (11) are embedded in insulation (16, 17) comprising a compacted powder, simple and reliable assessment is achieved by the fact that the X-radiation is passed through the thermocouple (10) perpendicular to the plane of the wires (13, 14) and an X-ray image is taken, that the position of the wires (13, 14) in the vicinity of the welded joint (15) is determined from the X-ray image, and that the quality of the thermocouple (10) is established from the position of the wires (13, 14) in the vicinity of the welded joint (15).