Characteristics and internal structure principle of thermocouple _ instrument

Thermocouple is a kind of temperature sensor, the use of the material when the temperature changes, its resistance also along with the change of characteristics to measure temperature. When resistance changes, the work shows the temperature resistance of the meter. It is fabricated platinum resistance diameter is small, flexible, suitable for installation in duct stenosis and require rapid response, miniaturization and other special occasions. It can be to - 200 ~ 600 ℃ temperature range of gas and liquid medium to automatically detect and solid surface, and can be directly connected with copper wires and secondary instrument use, because it has good electrical output characteristics, to display, data recorder, recorder, controller, scanner and computer to provide accurate input values. Thermocouple is the use of the material when the temperature changes, the resistance also along with the change of characteristics to measure temperature. When resistance changes, the work shows the temperature resistance of the meter. Thermocouple is a kind of temperature sensor, it is smaller than the diameter of a prefabricated thermocouple, flexible, good vibration resistance, suitable for installation in the case of prefabricated thermocouple can't install, WZPK thermocouple series adopts imported thermocouple temperature measuring element, therefore, is accurate, sensitive, quick thermal response time, stable quality, long service life, etc. Thermocouple protective mining have stainless steel, full of high-density oxide material inside insulation, therefore, thermocouple strong pollution resistance and mechanical strength, suitable for installation in harsh environment. Resistance characteristics of the external protecting tube of stainless steel, with high density in metallurgical grade magnesia oxide material insulation, so it has a strong pollution resistance and excellent mechanical strength, suitable for installation in harsh environment. Thermocouple are usually made of platinum thermocouple temperature sensing element, install fixtures and wiring devices, such as main parts, such as thermal response time, reduce the dynamic error; Small diameter, length is limited; High measuring accuracy; Import or production film resistance element, performance stable and reliable; ( 1) Thermal inertia small, response rapidly, such as the maintenance of tube fu 2 mm diameter common platinum resistance, the time constant of 25 s; The metal casing diameter twist. 0 mm thermocouple, the time often only about 5. ( 2) With flexible performance, kai thermocouple in addition to the head, can make the direction of bending, so it is suitable for the structure is relatively complex, DE temperature side of the small device ( 3) Has good resistance to vibration and shock resistance. ( 4) Thermocouple is a kind of temperature sensor, it is smaller than the diameter of a prefabricated thermocouple, flexible, good vibration resistance, suitable for installation in the case of prefabricated thermocouple can't install, WZPK thermocouple series adopts imported thermocouple temperature measuring element, therefore, is accurate, sensitive, quick thermal response time, stable quality, long service life, etc. 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 bimetallic thermometer for bit wire resistance provoked by the instrument error value. 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. Thermocouple are usually made of platinum thermocouple temperature sensing element, install fixtures and wiring devices, such as main parts, such as thermal response time, reduce the dynamic error; Small diameter, the length of the restricted.