Armoured thermocouple working principle and application instructions

Are you familiar with the working principle of armoured thermocouple? It is not difficult to answer this question, in fact, armoured thermocouple electrode is composed of two different conductor material. So, in the measurement end and reference end in a certain temperature difference, will then produce thermoelectric potential, so process on the instrument will show thermoelectric potential corresponding temperature value at present.

in actual application, armoured thermocouple need and other instruments, such as in most cases and all kinds of display instrument and record instrument or computer systems. Use of the product, can be directly measured in the production of a variety of zero to one thousand three hundred baidu within the scope of the liquid, steam and gas medium, as well as the temperature of the solid surface.

the armoured thermocouple in the practical work has the obvious advantage of the big four, point is that it can in a relatively short period of time accordingly, as much as possible to reduce the dynamic error; The second is the ability to bend to install use; The third point, can be in a wide range temperature measurement; Fourth, is has good compression performance and high mechanical strength.

under normal circumstances, armoured thermocouple has certain requirements of working environment temperature, usually in 20 plus or minus 15 degrees can be achieved under the environmental conditions of work for the ideal performance. And relative humidity no more than 80%. When the dc voltage is within the scope of the 500 + 50 v, insulation resistance between the electrode and the outer casing is more than 1000 m Ω.

and what this means is that if you choose a armoured thermocouple lengths of one meter sample, so the insulation resistance of 1000 m Ω; If length is 10 meters, so the insulation resistance for 100 m Ω.