1, appearance check.
Digital thermometers are generally made small and beautiful, smooth surface, no blemishes. 2, power check.
The switch knob will be placed in the pass position, see whether the display mark and the instructions on the same, disconnect the power supply and then connect to observe whether the same display the correct mark, if the power supply by a number of pass test, the correct mark are the same, and the display of the armpit temperature are basically the same, the repeatability of the digital thermometer is good. If the display is abnormal (temperature difference is too large), it means that the battery power of the digital thermometer is exhausted, or a poor contact somewhere.
3, accuracy check.
Press the switch knob and the 188.8 mark appears on the LCD display. Put the thermometer under the tongue for 1 minute, when the C mark stops flashing and beeping beep, the displayed reading is the body temperature, which is the oral body temperature. Repeat the test several times, the oral temperature should be the same, if not the same, the table repeatability is not good, can not be selected, and do not need to do the accuracy check, if the oral temperature is exactly the same, then you can carry out the axillary temperature, when the C mark stops flashing and there is a beeping tone, the reading displayed is the axillary body temperature. Again, take several more measurements with the same value of axillary temperature. General oral temperature is about 1 degree higher than the axillary temperature, if the tested oral temperature is too much or too little higher than the axillary temperature, it can be considered that the accuracy of the digital thermometer is not satisfactory.
4, if the thermometer is placed under the tongue for 1 minute, take out the C mark still continues to flash, it is necessary to disconnect the thermometer's power supply for 5 minutes and then turn on the power to re-measure. Generally, the display will not blink again after the temperature is removed from the mouth. If still intermittent flashing, the meter must have problems, can not be selected.
5, is not a regular manufacturer of production, standard class II medical devices, there is no after-sales service, there is no telephone address, and so on the packaging information, you can also go to the relevant company's official website.