During the sailing test of a ship after repair,it finds that the exhaust temperature display of each cylinder of the main engine is chaotic,and the exhaust temperature of some cylinders shows a negative increase,which is inconsistent with reality,and the working state of each cylinder of the main engine unable to determine.In order to eliminate the fault,this article removes and calibrates the thermocouple,eliminates the short circuit,open circuit,and ground fault of the line from the thermocouple to the temperature exhaust display instrument,and ana-lyzes the working principle of the thermocouple and compensation wire.The article finally finds out the cause of the fault and successfully solves the abnormal exhaust temperature display of the main engine through the sailing test.
exhaust temperature of themain enginethermocoupletemperature compensationpolarity