Calibrating (charts) of thermocouple chromel

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)

platinum-30% rhodium/platinum-6% rhodium

(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)

How to make a thermocouple of thermocouple

Calibrating (calibration charts) of thermocouple : chromel - kopel (ТCК, Type L). 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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-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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-chromel - alumel

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