When the installation of thermocouple performance problems

Thermocouple in the use of performance on the installation: a lot of problems don't wait for our thermocouple then to solve the problem, can install again when can solve the attention when installation, the use of the relationship between the thermocouple performance.

1. Insert depth. Electric installation the depth of the insert must satisfy the corresponding conditions. Once the actual temperature measurement process, the thermocouple insertion depth is not enough, will be the sidewalls of the protecting tube contact or surrounding environment influence, generating test error. So the insertion depth of the corresponding standard is (1) metal protection tube: 15 - the diameter of the insertion depth of 20 times. (2) the nonmetal protection tube: for a 15 10 times the diameter of the insert depth.

2. The installation direction. Here it is important to note that thermocouple installation position must keep the vertical position, to prevent the protection tube deformation occurs at high temperature. If horizontal temperature measuring element, is affected by high temperature automatic bending, if appear this kind of phenomenon, suggested that the user can choose the refractory or hot metal stents as support, prevention of bending.

3. Installation location. As a kind of temperature measuring device, its installation location is important. General component test M end to measured medium temperature in the correct place. If the test fluid temperature in the pipeline, just couple in the position of the pipeline flow velocity in the biggest work end, at the end of the thermocouple is more than 5 - the center line of the pipeline About 10 mm position.

thermocouple knowledge:

matters that should pay attention to using thermocouple, heat resistance,

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of the four basic laws of the working principle of thermal resistance

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the causes of measurement errors processing method of the cold junction of the thermocouple