Thermocouples of IEC 584-3
One connect 2 metals with different Thermoelectric strength to one thermo-pair so, an EMK develops at the free ends, their height isdependent on the difference of that Thermostrengths of the two metals and from the Temperature-difference between measuring point and free ends. The free ends also called as comparison-position. The formula EMK is valid consequently = f (T).
One gives the different thermo-pairs in the reference tables after IEC 584-3 Part 1 at, for example type K, J, N, S, R, B, T, E. The limit-deviations become in the Part 2 divided after tolerance-classes 1, 2 and 3 and document. The Part 3 treats that Extension – and Compensating leds; here the colorcode is for the respective thermocouples - type and the tolerance-class deposits.
Limit deviation – tolerance-class for thermo-pair
(comparison-put-temperature 0 °C)
For border-deviation (+/-) is valid the bigger value in each case and for the delivery-condition of the thermocouples. / t = | t |