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Calibrating of thermocouple (calibration charts)
For a condition, when a free end(shut) of thermocouple is at the zero of degrees celsius. A temperature is driven to °C, E.M.F. (tension) in mV.
chromel - alumel (-270 °с to 1370 °с)
(0 °с to 1820 °с)
chromel - constantan (-260 °с to 1000 °с)
copper - constantan (-270 °с to 400 °с)
chromel - kopel (-20 to 200 °с)
Calibrating (calibration charts) of thermocouple : chromel - kopel (ТCК, Type L according to GOST/IEC). Range of temperatures from - 20 °C to 200 °C
Dependence E.M.F. thermocouple : chromel - kopel from a temperature for a condition, when a free end (shut) of thermocouple is at the zero of degrees celsius.
Chromel - Copel thermocouple (TCC, Type L) have the highest differential sensitivity of all commercially available thermocouples. Chromel-Copel thermocouples are used for more accurate temperature measurements, as well as for measuring small quantities to the temperature difference. Chromel-Copel thermocouples have a very high thermoelectric stability in the range up to 600 ° C. This is explained by the fact that changes in the thermopower hromelevogo and Copel thermoelectrodes cancel each other out, as directed in the same direction. Chromel-Copel thermocouple can operate stably tens of thousands of hours.
The disadvantages include relatively high TCA compared with other thermocouples sensitivity to deformation.
Calibration table:
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Home >> Temperature, thermoelectricity >> Calibrating (calibration charts) of thermocouple : chromel - kopel
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Chromel - an alloy of chromium (Cr) and nickel (Ni).
Kopel - is an alloy of copper (Cu) and nickel (Ni).
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About TCK thermocouples
Chromel-kopel thermocouples (TCK), also known as type L, are used as temperature sensors due to their high thermoelectric power (EMF).
Key features and applications:
Type TCK thermocouples consist of a positive electrode made of chromel and a negative electrode made of copel. They have the highest thermo-EMF among common types of thermocouples (at temperatures up to 800 °C), which ensures high measurement accuracy, especially at low and moderate temperatures.
Materials: Chromel (nickel-chromium alloy) and copel (copper-nickel alloy).
Measuring range: Typically used in the temperature range from -200°C to +800°C, although the specific range depends on the design and protective fittings.
Advantages: High sensitivity (highest thermo-EMF), good stability, accuracy in moderate temperature ranges.
Applications: Widely used in various industries, scientific research, and gas equipment for temperature control and safety systems, for example, to shut off the gas supply when the flame goes out.