Do you have concept on the precision of the bimetallic thermometer?

Bimetallic thermometer are familiar with, general parameters are the size of the dial, screw tooth size, installation structure, some parameters, such as heat pipe length, but do you know about the precision of the bimetallic thermometer? Estimate the average person on the parameters of the bimetallic thermometer is not very understanding, the following will introduce the precision of the bimetallic thermometer! The precision of the bimetallic thermometer is refers to the temperature of the error range, high precision table prices would be higher precision generally poor watch some. Bimetallic thermometer manufacturing good after will test and calibration in the temperature test equipment, because the test equipment is electronic control equipment, in the process of heating or cooling, there will be instructions on drift, coupled with the role of the environment temperature influence, you will need to make some compensation on temperature, temperature compensation scope is a typical range is smaller than working temperature range, work within the scope of the bimetallic thermometer will surely achieve its performance index, the thermometer affects the output from the two aspects, one is zero drift, 2 it is to affect the full scale output. Such as a full range of + / - X % / ℃ and + / - reading X % / ℃, in the full range of + / - beyond the temperature range X %, within the scope of temperature compensation + / - reading X %, if it were not for the parameter, will lead to uncertainty in use. The change of the temperature transmitter output is caused by pressure changes, or caused by the temperature change. Temperature influence is to understand how to use the most complicated part of the transmitter, the precision of bimetallic thermometer need how much? Decision accuracy are: the nonlinear and hysteresis, repeatability, temperature, zero offset calibration, the influence of the temperature. But mainly by the nonlinear and hysteresis, repeatability, accuracy is higher, the higher the price. The temperature range of pressure transmitter transmitter usually a transducer calibration two temperature period truly, one of the temperature period is normal working temperature, the other is a temperature compensation scope, the normal operating temperature range is refers to the transmitter in the working status not be destroyed when temperature range, beyond the temperature compensation scope may reach its application performance metrics.