Using bimetallic thermometer, what need to pay attention to the problem?

Bimetallic thermometer is used widely, small to household food thermometer, big a special thermometer in various oil and nuclear power plant, its working principle is to round shape into threaded heat bimetallic strip as thermal devices, and put it in a protective sleeve tube, one end is fixed, known as the fixed end, the other end of the connection on a thin shaft, called the free end. Spool at the free end is equipped with a pointer. When the temperature changes, the resulting thermal devices the free end of the rotation, drive the thin axis from the Angle of the pointer changes, corresponding temperature indicator on the dial. Then you know use using bimetallic thermometer, need to pay attention to what problem? Sums up instrument for you at four o 'clock; 1, careful observation of the bimetallic thermometer range, be sure to select suitable thermometer; 2, bimetallic thermometer at the time of use, best insertion depth for two-thirds of the length of the heat pipe, because the temperature sensing element installed on the bottom of the heat pipe is only measured medium, the temperature sensing element completely immersed to measure the accurate temperature; 3, when using, avoid knock against bimetallic thermometer protecting tube, more should not appear the status of the bending deformation; 4, for bimetallic thermometer is often used, to do regular use of performance check, the best time is inspected once every six months.