How to distinguish the bimetallic thermometer is broken?

Bimetallic thermometer is a kind of professional in low temperature field temperature measurement. Today we're going to teach you how to distinguish between bimetallic thermometer is broken? To install the bimetallic thermometer on industrial equipment, for example. Use temperature indicating not found, if remove after precise indication or under ambient temperature difference is small, then the double metal linearization, the like pressure gauge play Kui pipe deformation, it is bad, bad maintenance can only be scrapped. If the temperature of the bimetallic thermometer gap is always a fixed value, then that is the zero point, can ask professional personnel by adjusting the buffer spring torsion to fix. But because the bimetallic thermometer is difficult in the remove or adjust, so can be amended by adjusting the dial. Our bimetallic thermometer has this feature, by the external set up a dial to adjust knob, through internal gear is connected with the dial, by adjusting the dial direction to make the instructions are in conformity with the actual, the equivalent of a zero. But this operation must be performed by professionals.