Bimetallic thermometer to check?

0 ℃ point calibration put thermometer detecting element into the mixture containing ice freezing tank, after waiting for a stable value for reading. Every other point of verification will be checked the detecting element and the standard of the thermometer thermometer inserted in the thermostatic bath, after waiting for a stable value for reading. When reading, bath temperature deviates from the inspection point temperature shall not exceed & plusmn; 2. 0℃（ Will be subject to standard thermometer) , write down the standard thermometer and checked respectively thermometer is, the schedule of value. In the process of reading, when the tank temperature does not exceed 300 ℃, its tank temperature change should not be greater than zero. 1 ℃, tank temperature exceeds 300 ℃, its tank temperature change should not be greater than zero. 5℃。 Value verification of electric contact thermometer on it, its lower limit should be set pointer were placed on the outside, the lower limit position. The error value of the thermometer should comply with the provisions of the table below.