The correct use of the method of double metal thermometer

1, to estimate the temperature of the liquid or gas to be tested. In order to measure the accuracy and the accuracy of reading and different temperature, choose a different thermometer. By first estimated by measuring the temperature of the liquid or gas to select suitable thermometer, lest cause the damage of the thermometer. 2, observe the range of the thermometer, and dividing values. Range is the range of the thermometer, such as the range of 0 - our common thermometer 100 ℃, dividing value refers to the thermometer every little represents how much above, it determines the accuracy of the measurement, we often use the index value of the thermometer is 1 ℃ or 2 ℃, see the range of the thermometer and after dividing values we can use the hands of the thermometer to measure the temperature of the liquid or gas. 3, measure the temperature. Measurement is a crucial step. If the measurement is wrong, the final measurement results must be wrong, so it is important to note that the measurement. Let the sheath maerial of thermometer immersed in liquid or gas being measured, don't touch the piping and piping, thermometer readings stable reading later. 4, reading. Reading is to read the final measurement results of the thermometer. When reading to make the sheath maerial of the thermometer to remain in the liquid or gas to be tested, and the line of sight to dial to the flat. Look down and look up in the reading results are not accurate. 5, and record the results. Must pay attention to the records of the results, the results of scientific is made up of Numbers and the unit together, be short of one cannot. Such as the water temperature is 52 degrees Celsius, we remember to 52 ℃.