The constant temperature water bath is used for temperature measurement of digital thermometers, with the tolerance at +/-0.1℃,  to ensure the accuracy of thermometers during mass production.

Adjust the temperature of constant temperature water bath to 35.5℃, 37.0℃ and 41.0℃, insert the thermometer product into the water bath for temperature measurement. When the displayed temperature does not change within a specified time, the thermometer will beep alarm to indicate that the temperature has stabilized.  Compare the temperature reading with the the value on standard thermometer, check the the accuracy of temperature measurement and record the test data.