A commercial oven that heats a critical product cannot exceed a predetermined temperature. A temperature sensing thermocouple circuit produces a voltage proportional to the oven
A commercial oven that heats a critical product cannot exceed a predetermined temperature.
A temperature sensing thermocouple circuit produces a voltage proportional to the oven temperature. The output voltage varies linearly from 0 V at 0C to 12 Vat 1000C. Design a circuit that will detect when a set temperature is exceeded and will output 0 V. That output will then shut off the +15-V power to the relay that is normally ON and controls the 240-V power to the oven. Once the relay trips, it needs to be reset manually. Figure 4–81
(a) shows the diagram of the task.
Oven 240 V (ON) or 0 V (OFF) Vieme 0-12 V Temp set VREF Vo 15 V or 0 V Comparator Relay (a)
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Authors: Roland E. Thomas, Albert J. Rosa, Gregory J. Toussaint
8th Edition
1119235383, 978-1119235385
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