Taking the test data in "Regulation of performance test for utility boilers"（GB10184-88） as example

the influence of uncertainty in temperature testing upon the results of measuring thermal efficiency for utility boilers has been analsyed by using the error theory. The results of analysis show

the uncertainty in temperature testing has certain influence upon the results of measuring the thermal efficiency of boilers. Hence

it is suggested that the different types of thermocouple and compensation lead wire should be used under different conditions.