Question 15.2: Suppose the thermocouple in Figure 15–21 is measuring 200°C ...
Suppose the thermocouple in Figure 15–21 is measuring 200°C in an industrial oven. The circuit board is in an area where the ambient temperature can vary from 15°C to 35°C. Using Table 15–2 for a type- T (copper/constantan) thermocouple, determine the voltage across the circuit input terminals at the ambient temperature extremes. What is the maximum percent error in the voltage at the circuit input terminals?
TABLE 15–2 • Type-T thermocouple voltage. | |
TEMPERATURE (°C) | OUTPUT (mV) |
-200 | -5.603 |
-100 | -3.378 |
0 | 0.000 |
+100 | 4.277 |
+200 | 9.286 |
+300 | 14.860 |
+400 | 20.869 |
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