4–82 AChromel-Constantan thermocouple (curve E) has the characteristics shown in Figure P4–82. Design an interface that will produce a −5-V to + 5-V output where −5 Vrefers to 0C and + 5 V refers to 1000C. The transducer can be modeled as a voltage source in series with a 15-Ω resistor.

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Potential (mV) 80- mV 70- 60- 50- 40- 30- 20 10- 0- [I] E J K -R- S 0 100 200 300 400 500 600 700 800 900 1000 Cold-hot junctions temperature gradient (C) FIGURE P4-82