Pressure type thermometer calibration method

Pressure type thermometer is the use of sealing system of temperature measuring the pressure of the material to the lateral temperature with the temperature change. According to the temperature material filling phase, inflatable, liquid type and steam type 3 kinds. Pressure type thermometer calibration method: 1, the measurement of environmental conditions: temperature: ( 15 - 35) ℃, relative humidity: 85% RH or less. 2, measurement standard and its main technical requirements: second-class standard mercury thermometer. Standard constant temperature tank: 0 work area the largest temperature difference. 2 ℃, the working area 0 level temperature difference. 1℃； Freezing point. 3, the object to be tested and the main performance: the measuring range is ( 0 - 300). Level 1 ℃, accuracy. Level 5, dividing value is 5. 0 ℃ pressure thermometer; Pressure type thermometer in ( 0 - 300). ℃ range error is not more than plus or minus ( A % x range) ℃. 2. 4 the use of evaluation results: the measurement uncertainty evaluation can be directly used for repeatability and reproducibility conditions under the condition of the measured results. Pressure type thermometer structure is relatively simple, cheap, the scale is clear, suitable for fixed gas, steam, or liquid in the industrial equipment.