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The signal for the pyrometer begins at a Type K thermocouple that is mounted in the
exhaust stream and connected to the Interface Module. A thermocouple creates a
small voltage (less than 33 millivolts) that changes depending upon its temperature.
As the exhaust temperature rises, the thermocouple output voltage increases. The In-
terface Module converts the voltage into data that it places on the private data bus.
Connections are shown in Figure 3-10.
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