What are the calibration methods of melting thermometer?

1、 Principle of melting thermometer

The melting thermometer is realized by measuring and detecting the temperature of liquid. Its working principle is to measure the resistance and capacitance changes of temperature changes, and then use microprocessor for digital calculation, and finally convert the digital signal into temperature. In addition, it can also control the temperature of the liquid through the built-in electric heating element.

2、 Calibration of melting thermometer

It is necessary to calibrate the melting thermometer, and its accuracy will affect the experimental results. The calibration methods are different, and the specific steps are as follows:

1. put the uncalibrated melting thermometer into the calibration box and place the calibration box in a constant temperature water bath;

2. set the temperature controller to the accurate calibration temperature;

3. use the reading of calibration equipment and calibration value for comparison test. If the calibration value is inconsistent with the actual reading, it is necessary to perform parameter adjustment;

4. the melting thermometer can be used when it is calibrated;

3、 Maintenance of melting thermometer

During the continuous use of smelting thermometer, regular maintenance is required to ensure its normal operation. The maintenance should include checking the condition of the internal electrical components of the instrument, checking whether the temperature sensor is damaged, and checking whether the external power line and control line of the instrument are intact.

In addition, the external surface of the melting thermometer should be cleaned regularly, and different parts should be replaced regularly according to the use situation to ensure the correct use of the instrument. At the same time, the smelting thermometer should be regularly put into the verification room for verification to ensure the correctness of the instrument.