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Type A Thermocouples>
Temperature
Range
(°CJ
I.
Quartic Equation
-50 to 900
Oto1100
0 to 1400
0 to 1650
Oto 1768
400 to 1100
400 to 1400
400 to 1650
1050 to 1400
1050 to 1650
1400 to 1550
1400
to
1650
1400 to 1768
1666 to 1768
Reference Junction
Correction
0 to 50
•o
Argument Exp.
-4.0674108
+2
-5.6047484
+2
-5.4505828
+2
1.6618159
+3
1.5132838
+3
2.4008703
+3
1.5787334
+3
- 7.1904948
+4
8.8532076
+4
5.2891411
+O
•1
Argument
Exp.
Argument
5.4295008
+O
1.1446885
5.7622558
+O
9.2715271
6.1429m
+O
7.1515857
6.4615269
+O
5.7010917
6.5962120
+O
5.1559203
8.7490294
+O
1.7115155
9.6731111
+O
-2.6994046
9.5942872
+O
-1.2813352
2.3048526
+O
8.7635426
2.7958847
+O
8.1571403
4.1604579
-1
1.0549178
2.6321144
+O
8.3100314
1.9442383
+2
-1.7913090
- 1.5014129
+2
9.5376167
1.3844426
-2
-2.0889531
a3
Exp.
Argument
Exp.
-2
-1.1295306
-5
-3
- 7.1346883
-6
-3
-3.7539447
-6
-3
-1.8683292
-6
-3
-1.2385309
-6
-3
7.5039035
-7
-4
2.5536988
-6
-4
2.4468512
-6
-3
-2.3016819
-6
-3
-1.9701159
-6
-2
-3.0383521
-6
-3
-2.0332036
-6
-1
7.9264764
-5
-2
-1.6644901
-5
-5
- 0.01 to + 0.01
Argument
Exp.
5.0020496
-9
2.5877458
-9
9.6963832
-10
2.3636365
-10
1.8827643
-11
-3.0096280
-10
-8.9155491
-10
-8.6286756
-10
7.4284923
-11
6.5568964
-12
1.8540516
-10
1.6260416
-11
- 1.3187245
-8
-8.3062870
-10
i
Error
Range {µV)
Exact-Approx.
- 7 to 15
-16to12
-35to25
-55 to 35
-65to35
- .4
to .5
-1.7101.6
-2.1to1.8
- .05 to .05
- .05 to .05
- .05 to .05
- .05 to .05
- 1.0 to 1.3
- .05 to .05
>Quadratic, cubic, and quartic approximations to the data as a function of temperature {°C) in selected temperature ranges. The expansion is of the form
E
=
ao
+
a1T + a2T2
+
a3T3+ a4T4 where Eis in microvolts and Tis in degrees Celsius.
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