The error of the bimetallic thermometer allows how to calculate?

Bimetallic thermometer, as a kind of measuring instruments, we usually use to represent the precision accuracy level. Precision measuring instrument is one of the important indicators of quality, our country industrial instruments into 0. 1, 0. 2, 0. 5, 1. 0, 1. 5, 2. 5, 5. 0 seven grades, and logo on the meter scale or nameplate. Accuracy level customarily called precision level. And the precision of the bimetallic thermometer is usually 1. 0 s and 1 s. 5. Bimetallic thermometer precision grade based on its permissible error of the dial scale value by it's percentage, its accuracy level the greater the number of permissible error of dial scale limit value is larger. Range, the greater the same precision level, it measured the absolute value of the temperature the greater the margin of error. 1. Level 5 and 1. Level 0 respectively under normal use, the the permissible error of the thermometer was range & plusmn; 1. 5% and & plusmn; 1. 0%. For example: full range is 100 degrees, if precision is 1. 5, margin of error for & plusmn; 1. 5 degrees; If precision is 1. 0, allowable error is & plusmn; 1 degree.