Patent ID: 6671346
Filing Date: 2003-12-30
Classification: G01K

Abstract:
A method for the nondestructive quality testing of a thermocouple which can be used at high temperatures high levels of vibration, or both, which thermocouple comprises at least two wires which run substantially parallel to one another in one plane, the wires are connected to one another at one of their ends by a welded joint, the wires are surrounded by a hermetically sealed sheath, and inside the sheath the wires are embedded in insulation comprising a compacted powder, the method comprising:Passing X-radiation through the thermocouple perpendicular to the plane of the wires and taking an X-ray image; determining the position of the wires in the vicinity of the welded joint from the X-ray image; and establishing the quality of the thermocouple from the position of the wires in the vicinity of the welded joint.