Equipment for the analysis of the homogeneity of the Seebeck coefficient in thermocouples

摘要

The equipment for the analysis of the homogeneity of the Seebeck coefficient in thermocouples, belonging to the field of test or calibration of thermometers, is based on the principle of measurement of the deviation of the FEM when a small heated zone is moved in parallel along the thermocouple, while Q The EU the junctions of reference and measurement are maintained in the vessel to the dewar u00ba C (double point of water).The heater (1.2), preferably in cylindrical shape, is fixed to a displacement device (2) is formed by linear basis (2.1.1) of vertical or horizontal displacement, the spindle sphere (2.1.2), a heater (2.1.3), shaft coupler (2.1.4), bearings (2.1.5), support of the base line. Air (2.1.6), feet with anti vibration system (2.1). 7), support of the dewar vessel (2.1.8) as shown in Figure 2. The spindle sphere (2.1.2) is turned by a motor (2.1.9), preferably a step bipolar configuration, with a full step. The motor (2.1.9) is switched by a driver chopper (1.3.1) energized by a symmetrical voltage source (1.6), and these elements controlled by an automation system with a computer program supervisory dedicated (5, 6, 7 and 8).The supervisory computer program dedicated to the "equipment for the analysis of the homogeneity of the Seebeck coefficient in thermocouples" is formed by the step motor drive module shown in Figure 11.Step motor module of full step I half step shown in Figure 12; modulus of displacement shown in Figure 13; module control of the set point I peep of the heater shown in Figure 14 and module analysis of the data shown in Figure 15.