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The following thermocouple table is used:

A thermocouple is used to measure temperature in the boiler.

A second thermocouple is used to measure temperature in the control room, where the control room has an ambient temperature of 22 degrees Celsius.

Two thermocouples are connected in SERIES to a temperature measuring device inside a control room.

At the point of connection in the boiler, a value of 6.799 mV is measured.

Fig: 1

Fig: 2