What is industrial thermocouple calibration furnace _ instrument

Overview: thermocouple calibration furnace is quality inspection department and the temperature measurement department of enormous quantity wide industrial thermocouple temperature - Resistance characteristics of the necessary device for testing. Second, the main technical parameters ( 1) Test temperature range 100 - 600℃( 2) At the bottom of the test tube since 150? Within and between any two points temperature does not exceed 1 k ( 3) Between each hole ( Four test hole) The temperature difference between no more than 1 k ( 4) Power supply voltage 50 hz220 (plus or minus 10% v 5) Heat up a large power 3. 5kva( 6) Overall dimensions: width * high thick = 410 x 410 x 750? ( 7) Weight: about 32? - - Commonly used in low temperature area > thermocouple is a kind of temperature measuring element, and they are widely used in the thermal power units to understand the working principle of thermocouple and apply it to the actual production, to ensure accurate and reliable in the thermal measurement is of great significance, in this paper, this paper introduces the principle of temperature measuring thermocouple elements combined with the actual application, analysis of common failures. Thermocouple temperature measurement is based on the heating effect of the resistance, the resistance of the characteristics of the resistance varies with temperature. Therefore, as long as the resistance changes, measure the temperature of thermocouple is converted to voltage signal by measuring the bridge to the measured temperature display instrument instructions or record can be commonly used in low temperature area measuring thermocouple is a kind of temperature measuring element, and they are widely used in the thermal power units to understand the working principle of thermocouple and apply it to the actual production, to ensure accurate and reliable in the thermal measurement is of great significance, in this paper, this paper introduces the principle of temperature measuring thermocouple elements combined with the actual application, analysis of common failures. Thermocouple temperature measurement is based on the heating effect of the resistance, the resistance of the characteristics of the resistance varies with temperature. Therefore, as long as measure the thermal resistance changes of thermocouple, through measuring bridge into a voltage signal is sent to the measured temperature display instrument instructions or record can measure the temperature. Currently widely used thermocouple materials is platinum and copper, platinum resistance is high precision, suitable for neutral and oxidizing medium, good stability, has a certain nonlinear, the higher the temperature the smaller the resistance rate of change; Copper resistance in the temperature range of a linear relationship between internal resistance value and temperature, temperature line number is big, suitable for corrosive medium, more than 150 ℃ susceptible to oxidation. From the perspective of the change of resistance with temperature, most of the metal conductor has this property, but not all can be used for temperature measuring thermocouple, thermocouple as general requirements of metal materials, as far as possible big and stable temperature coefficient, resistivity ( Reduce the size of the sensor) under the same sensitivity , using temperature range has stable chemical physics performance, good replication of material and resistance change with temperature have the function relationship between ( A good linear relationship) 。 Thermocouple elements under the effect of temperature, the resistance wire resistance change and change. Can be used to measure - 200 ℃ ~ 800 ℃ ﹢ range of temperature. Its advantage is: minimal deviation. Because of its good electrical output performance, thermocouple can be adjusted for the digital display table, recorder, instrument, scanner and computer to provide accurate input values.