Abstract: Through the analysis of the working principle and error cause of HMP155 temperature and humidity sensor,the corresponding treatment method is given.The problem of humidity sensor has been solved by using M2000 as a generator and provide a standard environment standard,using the multimeter,analog switch, analog interface,3MS software always read and display of data,sums up an effective adjustment method,according to the result of humidity verification regulation for adjusting and testing.At last,the objectivity and accuracy of measurement value of humidity sensor has been ensured.

Key words: HMP155 temperature and humidity sensor, adjustment method, hyperdifference, objectivity