Hua'an is aflexible thermometer chinese manufacturer
Use a thermometer
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.