In use process should be based on thermocouple temperature measurement range and measurement of object, choosing the right of the thermocouple type, specification and maintenance of pipe materials. Thermocouple temperature and high pressure cannot surmount the numerical rating of the thermocouple. If the thermocouple to be used in the corrosive medium, maintenance should be made of stainless steel pipe. Most of the thermocouple sensor is about 120 mm in length, select the thermocouple inserted depth, should consider to the thermocouple sensor can only measurement of full range of the measured medium uniformity degree. Thermocouple wiring, junction box opened the first, and then wiring. Connection way of general there are two wire and three-wire system two kinds. Three wire system has the advantage of cohesion, can prevent the bimetallic thermometer provoked by connecting wire resistance value of the instrument error value for show. Thermocouple appeared with the connecting wires should be insulated copper wire, shall not use the thermocouple compensating lead wires. Shows copper wire resistance should be according to the rules of data matching instrument technique conditions, the average of 2 a 50, dc balanced bridge wire resistance value can be used to adjust. Can't take a thermocouple with two instrument used in parallel, as long as the double branch thermocouple with appeared two instrument can only be used to apply. Thermocouple and its attachments without using, the required storage in tungsten-rhenium thermocouples are not affected by the middle of the vibration and impact. Appropriate storage location condition is: 10 to ambient temperature 35 gc; Relative humidity is not more than 80%; Should not contain may form in the air around the thermocouple parts corrosion substance. Above is the thermocouple in use process must pay attention to some of the details, hope you serious operation, can let the thermocouple have longer service life.