Hua'an main produce cartoon character thermometer
,cartoon character thermometer character simplicity and convenient operation, accurate measurement, high precision and the ability to automatically broadcast temperature
The use of mercury thermometers
When using the thermometer , the first to see its range ( measuring range ) , and then see its minimum scale value , which is the value of each small grid represents. To select an appropriate thermometer to measure the temperature of the measured object . When measuring thermometer vacuole full contact with the measured object should be , and can not hit the side wall of the glass bulb or bottom of the measured object ; When reading , the thermometer should not leave the object , and the sight of the eyes should be level with the thermometer inside level.
1 . Should be verified before use ( using standard liquid temperature calibration multivessel comparison method or using more advanced precision thermometer calibration ) .
2 . Not allowed to use this kind of measurement temperature exceeds the maximum scale value thermometer .
3 . Thermal inertia thermometer , the thermometer should be stable in the reading state . When the tangential direction at the highest temperature readings convex meniscus read , his eyes look .
4 must not be used as a stirring rod .
5. Mercury thermometers should be measured perpendicular to the flow direction of the working medium or inclined shape.
6. Mercury thermometer mercury column fracture often occurs circumstances , the elimination method :
1 . Cold repair method: the package insert thermometer temperature of dry ice and alcohol mixture ( temperature not exceeding -38 ?) carried shrink , so that all the capillaries shrink to mercury thermometer package so far.
2 . Hot repair method : insert the thermometer slowly measuring temperature slightly above the upper limit of the constant temperature bath , the mercury breaking part connected with the whole of the mercury column , then slowly remove the thermometer in the air is gradually cooled to room temperature.