How to correctly use of glass liquid thermometer?

A lot of people in the use of the thermometer, sometimes will produce error, this may has something to do and the method of using, in order to reduce the glass liquid thermometer due to improper use of measurement error, in terms of the use of the thermometer, the following points should be paid attention to: ( 1) Before use should be observed thermometer have burst, liquid column presence & other; Broken column & throughout; The phenomenon such as; （ 2) Should be used according to the regulations of the thermometer immersed depth, or you'll be revised; （ 3) When measuring high or low temperature, attention to the thermometer for preheating or precooling; （ 4) Time to pay attention to the reading of the thermometer, namely thermometer inserted into the constant temperature box after medium, generally go through 5 - After 10 minutes, can only be readings; （ 5) When reading, the line of sight and should be yourself at the same level; （ 6) Thermometer in use to should take put down gently, avoid violent vibration, use after deposit should be put into the box.