Platinum rhodium thermocouple when installing and using need to pay attention to?

Platinum rhodium thermocouple temperature measuring instrument is commonly used in temperature measuring element, it directly measure temperature, and the temperature signals into a thermoelectric emfs, through electrical instrument ( Secondary instrument) Convert the temperature of the measured medium. Thermocouple installation method are: the main fixed way are threaded connection, flange connection and welding, its applicable occasions and different requirements, mainly according to the parameters such as pressure, temperature. So we should pay attention to what aspects when installed and used? Three chang instrument will tell one by one to you today.

1, must pay attention to when using thermocouple compensating conductor model is suitable, the polarity can't wrong, compensation conductor should be connected to the thermocouple temperature should not exceed 100 ℃.

2, when using the time constant of thermocouple temperature or temperature control, instrument display temperature fluctuation is small, but the actual furnace temperature fluctuations can be quite large. In order to accurately measure temperature, should choose small thermocouple time constant.

3, according to the instrument to correct connection electric wiring diagram, after first instrument display instrument of thermocouple indexing number, and then display instrument range limits, and then measuring instrument discharge of digital tube display set temperature, the digital tube display on the meter measuring temperature.

4, thermocouple cannot be installed in a few measured medium flowing area, when measured with thermocouple tube gas temperature, thermocouple must be made against the flow direction of installation, and fully contact with the gas.

5, in order to make the measurement end of the thermocouple and thermal resistance and had good heat exchange between the measured medium, should choose the observation points, try to avoid in the middle of the valve

6, on the basis of law of conductor in thermocouple temperature measuring actual applications, often takes the form of hot side welding, cold end open circuit, the cold end by the wires are connected to the display instrument constitutes a temperature measuring system.

platinum-rhodium thermocouple are suitable for all kinds of high temperature circumstance in the process of production, are widely used in powder metallurgy, bright sintering furnace, vacuum furnace, melting furnace, glass, ceramic and industrial salt bath furnaces and furnace temperature.