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3.3.1 Voltage - TO - Temperature Conversion
The temperature-versus-voltage relationship of a the thermocouple is not linear.
You can reference the thermocouple reference tables to get V to T values. Or
use temperature conversion equation to get V to T values.
Temperature Conversion Equation:
T = a0 + a1 x + a2 x^2 + a3 x^3 + a4 x^4 + ........ + an x^n
where
T = Temperature
x = Thermocouple Voltage
a = Polynomial coefficients unique to each thermocouple
n = Maximum order of the polynomial
TYPE E
a0
-100°C to 1000°C 0°C to 760°C
a1
0.104967248
a2
17189.45282
-282639.0850
a3
12695339.5
a4
-448703084.6
a5
1.10866E+10
a6
-1.76807E+11
a7
1.71842E+12
a8
-9.19278E+12
a9
2.06132E+13
Note:
1. The thermocouple range of this table is this equation limited.
2. Other detail data please reference thermocouple data book.
OME-DB-889D User's Manual
TYPE J
TYPE K
0°C to 1370°C
-0.048868252
0.226584602
19873.14503
24152.10900
-218614.5353
67233.4248
11569199.78
2210340.682
-264917531.4
-860963914.9
2018441314
4.835606E+10
-1.18452E+12
1.38690E+13
-6.33708E+13
TYPE R
TYPE S
0°C to 1000°C 0°C to 1750°C -160°C to 400°C
0.263632917
0.927763167
179075.491
169526.5150
-48840341.37
-31568363.94
1.90002E+10
8990730663
-4.82704E+12
-1.63565E+12
7.62091E+14
1.88027E+14
-7.20026E+16
-1.37241E+16
3.71496E+18
6.17501E+17
-8.03104E+19
-1.56105E+19
1.69535E+20
TYPE T
0.100860910
25727.94369
-767345.8295
78025595.81
-9247486589
6.97688E+11
-2.66192E+13
3.94078E+14
13
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