WSS - The main factor causing error 411 double metal thermometer

WSS - 411 bimetallic thermometer when measuring temperature, the built-in bimetallic strip are produced according to the temperature as high as the corresponding change, bending degree of bimetallic strip is mainly come from the measured temperature. Will usually small expansion coefficient of bimetallic strip layer called the passive layer, called the first floor of a large expansion coefficient of active layer. As a major cause of bimetallic thermometer appear error what? The following look at together. 1, the environmental conditions: WSS - The bimetallic thermometer should be in temperature is 411 - 40℃本; + 55 ℃, relative humidity is not more than 85% under the conditions of use, otherwise it will cause greater error. 2, mechanical damage, in use, the instrument has been heavily impact and collision, easy to cause the protection tube deformation, thus affecting the normal work caused by the error of measuring mechanism. 3, the fatigue damage: after using for a long time, can make the performance of the sensing element change caused by the error. 4, inserted into the medium depth: WSS - 411 the depth of the bimetallic thermometer inserted into the medium must ensure that is greater than the length of the sensing element, if the insertion depth will cause the error.