The B-type thermocouple shows over 40°C at room temperature of 20°C! What extent of deviation will this cause in temperature measurement at high temperatures?
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What extent of deviation will this cause in temperature measurement at high temperatures?
According to the law of intermediate temperature, assuming that the constant temperature at the reference terminal is 20 degrees Celsius, one can first measure E(40,20), then look up the value of E(20,0) in a table. By adding these two thermoelectromotive forces together, E(40,0) can be obtained; finally, by referring to a calibration table, the desired value can be calculated. Values for other temperatures can also be derived from this.
Based on our actual usage experience, the readings from Type B thermocouples are considered reliable only above 600 degrees; below 500 degrees, we use Type K thermocouples to measure the temperature. The former is known as a standard thermocouple or high-temperature thermocouple, while the latter is called a temperature-raising thermocouple. Usually, for both cases, it is sufficient to replace the thermocouple element within the same mounting sleeve and adjust the temperature sensing configuration.
The readings from Type B thermocouples are considered reliable only above 600 degrees; below 500 degrees, we use Type K thermocouples to measure the temperature
It’s only necessary for measuring high temperatures, right? When the temperature is too low, it may not be reliable after all
It’s only necessary for measuring high temperatures, right? When the temperature is too low, it may not be reliable after all
Near room temperature, thermal resistors or type E are the preferred choices
Near room temperature, thermal resistors or type E are the preferred choices