E1C08 09/14/2010
14:54:1 Page 342
Table 8.7 Reference Functions for Selected Letter Designated Thermocouples
The relationship between emf and temperature is provided in the form of a polynomial in temperature [10]
E ¼
X n
i¼0
c i T
i
where E is in mV and T is in
C. Constants are provided below.
Thermocouple Type
Temperature Range
Constants
J-type
À210 to 760
C
c 0 ¼ 0.000 000 000 0
c 1 ¼ 5.038 118 7815 Â 10
1
c 2 ¼ 3.047 583 693 0 Â 10
À2
c 3 ¼ À8.568 106 572 0 Â 10
À5
c 4 ¼ 1.322 819 529 5 Â 10
À7
c 5 ¼ À1.705 295 833 7 Â 10
À10
c 6 ¼ 2.094 809 069 7 Â 10
À13
c 7 ¼ À1.253 839 533 6 Â 10
À16
c 8 ¼ 1.563 172 569 7 Â 10
À20
T-type
À270 to 0
C
c 0 ¼ 0.000 000 000 0
c 1 ¼ 3.874 810 6364 Â 10
1
c 2 ¼ 4.419 443 434 7 Â 10
À2
c 3 ¼ 1.184 432 310 5 Â 10
À4
c 4 ¼ 2.003 297 355 4 Â 10
À5
c 5 ¼ 9.013 801 955 9 Â 10
À7
c 6 ¼ 2.265 115 659 3 Â 10
À8
c 7 ¼ 3.607 115 420 5 Â 10
À10
c 8 ¼ 3.849 393 988 3 Â 10
À12
c 9 ¼ 2.821 352 192 5 Â 10
À14
c 10 ¼ 1.425 159 477 9 Â 10
À16
c 11 ¼ 4.876 866 228 6 Â 10
À19
c 12 ¼ 1.079 553 927 0 Â 10
À21
c 13 ¼ 1.394 502 706 2 Â 10
À24
c 14 ¼ 7.979 515 392 7 Â 10
À28
T-type
0 to 400
C
c 0 ¼ 0.000 000 000 0
c 1 ¼ 3.874 810 636 4 Â 10
1
c 2 ¼ 3.329 222 788 0 Â 10
À2
c 3 ¼ 2.061 824 340 4 Â 10
À4
c 4 ¼ À2.188 225 684 6 Â 10
À6
c 5 ¼ 1.099 688 092 8 Â 10
À8
c 6 ¼ À3.081 575 877 2 Â 10
À11
c 7 ¼ 4.547 913 529 0 Â 10
À14
c 8 ¼ À2.751 290 167 3 Â 10
À17
342 Chapter 8 Temperature Measurements