Thermocouple thermometer how to install?

Thermocouple and thermal resistance thermometer belongs to the non-contact thermometer, because of its irreplaceable advantages into industrial and mining enterprises and scientific research institutes of commonly used temperature measuring instrument. The correct installation of thermocouple and thermal resistance sensors is to guarantee the measurement precision and service life of the important factors. Below according to the usual usage in the installation of several common way for some introductions, the hope can give you the actual work to provide some reference. First installation of thermocouple and thermal resistance should be kept vertical, in order to prevent the protective casing deformation at high temperature, but in a case, with velocity must be against the flow into the measured medium, to ensure that the temperature measuring device with full access to ensure the accuracy of measurement of the fluid. Another thermocouple and thermal resistance should be installed in a protective layer of the pipe as far as possible, in order to prevent heat loss. Second when the thermocouple and thermal resistance sensors installed in the suction pipe, must ensure that the measurement has good sealing, to prevent cold air into the outside world, the reading is low. When the thermocouple and thermal resistance sensors installed in the outdoor, thermocouple and thermal resistance sensor junction box cover should be upward, into the mouth line should be down, in order to avoid the rain or dust into the junction box, and damage the thermocouple and thermal resistance terminal box wiring affect the measuring accuracy. Should check the wiring of the thermocouple and thermal resistance thermometer everywhere, especially the thermocouple thermometer because of its material hardness is higher, compensation conductor should be very easy from the terminal from open circuit fault, so be connection too good not to touch to move the connection of the thermometer and check regularly, in order to obtain the correct temperature measurement. Thermocouple when installation should be placed in as close to measure the temperature of the control points. To prevent heat along the thermocouple protection tube transfers or prevent affect measured temperature, thermocouple should be immersed in the flow in the body, at least for 10 times the diameter of the depth. When measuring solid temperature, thermocouple shall be under the material or close contact with the material. In order to make the thermal error minimum, should diminish the temperature gradient near the junction. When the gas pipe is measured with a thermocouple temperature, if the tube wall temperature significantly higher or lower, the thermocouple to radiation or absorption of heat, so as to significantly change the temperature being measured. At this time, can use a radiation shield to make its temperature close to the gas temperature, the so-called screen cover thermocouple. Choosing a temperature measuring point should be representative, such as temperature of fluid, the measurement end of the thermocouple should maximize in pipe flow. In general, the end of the thermocouple protection tube should be over the velocity of the centerline.