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This post was last edited by *aojiaoya0546 on 2016-8-9 at 22:22. http://www.china-hcyb.com/up_files/%E5%AE%8F%E5%88%9B%E9%93%82%E9%93%91%E7%83%AD%E7%94%B5%E5%81%B6%281%29.jpg Industrial platinum-rhodium thermocouples, also known as noble metal thermocouples, are used as temperature measurement sensors. They are typically used in conjunction with temperature transmitters, regulators, and display instruments to form process control systems, enabling direct measurement or control of the temperature of fluids, steam, gases, and solid surfaces within the range of 0–1800°C in various production processes. Suitable for high-temperature environments in various production processes; it is widely used for temperature measurement in powder metallurgy, sintering bright furnaces, vacuum furnaces, smelting furnaces, the glass industry, steelmaking furnaces, as well as in ceramic and industrial salt bath furnaces. 1. When using thermocouple compensation wires, it is essential to ensure that the models match, that the polarity is correct, and that the temperature at the connection point between the compensation wire and the thermocouple does not exceed 100°C. 2. When using thermocouples with a large time constant for temperature measurement or control, although the temperature displayed by the instrument fluctuates very little, the actual temperature of the furnace can fluctuate significantly. To measure temperature accurately, a thermocouple with a small time constant should be selected. 3. Connect the wires correctly according to the instrument’s wiring diagram. After power is applied, the instrument first displays the thermocouple calibration number, then the measurement range. The digital display at the bottom of the instrument shows the set temperature, while the digital display at the top shows the actual measured temperature. 4. Thermocouples should not be installed in areas where the flow of the medium being measured is very slow. When using a thermocouple to measure the temperature of gas inside a tube, it must be installed in the direction opposite to the flow of the gas, and it must have full contact with the gas. 5. To ensure adequate heat exchange between the measuring ends of thermocouples and thermal resistors and the medium being measured, the location of the measurement points should be selected carefully, with an effort to avoid placing them near valves. 6. According to the intermediate conductor law, in practical temperature measurement applications using thermocouples, the hot end is usually welded together while the cold end remains open; the cold end is then connected to a display instrument through wires, thereby forming a temperature measurement system.