Thermocouples of IEC 584-3
a) Functionality / Norms
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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 |
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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)
| Type- thermo-pair +/- |
Class 1
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Class 2
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Class 3
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K - NiCr / Ni
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1,5 ° C or 0,4 % x t
- 40 ° C .......... +1000 °C
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2,5 °C or 0,75 % x t
-40 °C .......+ 1200 °C
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2,5 °C or 1,5 % x t
-200 °C ......... + 40 °C
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J - Fe / CuNi
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1,5 ° C or 0,4 % x t
- 40 ° C ....... +750 °C
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2,5 °C or 0,75 % x t
-40 °C .........+ 750 °C
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-
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N - Nicrosil / Nisil
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1,5 ° C or 0,4 % x t
- 40 °C .......+1000 °C
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2,5 °C or 0,75% x t
-40 °C .........1200 ° C
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2,5 °C or 1,5% x t
-200 °C.......... +40 °C
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S - Pt10%Rh / Pt
R - Pt 13%Rh / Pt
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1 ° C or
1+(t - 1100) x 0,003 °C
0 °C ......... + 1600 °C
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1,5 °C or 0,25 % x t
0 °C ........... + 1600 ° C
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-
-
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B - Pt30% Rh / Pt6%Rh
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-
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0,25% x t
600 °C ......... 1700 °C
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4 °C or 0,5 % x t
+600 °C ....... + 1700 °C
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T - Cu/CuNi
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0,5 °C or 0,4% x t
- 40 °C........ + 350 °C
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1 °C or 0,75 % x t
- 40 °C .......... + 350 °C
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1 °C or 1,5% x t
-200 °C ........... + 40 °C
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E - NiCr/ CuNi
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1,5 ° C or 0,4 % x t
- 40 ° C ........ + 800 °C
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2,5 °C or 0,75% x t
-40 °C .......... + 900 °C
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2,5 °C or 1,5 % x t
-200 °C ....... + 40 °C
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For border-deviation (+/-) is valid the bigger value in each case and for the delivery-condition of the thermocouples. / t = | t |
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