Bimetallic thermometer performance requirements

Bimetallic thermometer, can work in temperature more than set value, automatic signal control to cut off the power supply or the police. Can replace other form of thermometer table; Is a precision instrument, measuring temperature has a high requirement for accuracy and error, so the performance of bimetallic thermometer has strict request, specific as follows: 1, the maximum permissible error: accuracy degree and the accuracy of the bimetallic thermometer levels and the maximum permissible error ( Allowed error limits) Should comply with the national standard 'JJG 226 - 2001 the provisions of the bimetallic thermometer verification regulation. 2, back to the poor: return difference of bimetallic thermometer should not be greater than the maximum permissible error of the absolute value. 3, Angle adjustment error: adjustable Angle thermometer values change caused by Angle adjustment shall not exceed the range of 1. 0%. 4, repeatability: repeatability of bimetallic thermometer should be not more than half of the maximum permissible error absolute value. 5, poor: switch electric contact thermometer, the change-over difference should not be greater than the maximum permissible error of the absolute value of 1. 5 times. 6, switch repeatability: electric contact thermometer, its switch repetitive should be not more than half of the maximum permissible error absolute value. 7, thermal stability, verification of the bimetallic thermometer for the first time after the measurement limit to keep the time given in table 2, it still should comply with the rules of error.