How much do you know about the standard requirement of temperature and humidity meter?

In winter the weather is dry, temperature and humidity meter is the most widely used articles for daily use, but how much do you know about temperature and humidity meter? Instrument to popularize the knowledge to everyone today: temperature and humidity meter should be able to in the temperature - 35° 45°C ~ C, relative humidity 30% ~ 100% normal work environment. The temperature of the temperature and humidity meter in value compared with the standard thermometer, when adjusting the 0 & deg; C point error value is 0. 0° C, 40 & deg; C and - 30° C laboratories should not exceed the value of error & plusmn; 1. 0° C。 The normal work of the temperature and humidity meter, its value and the actual temperature value of the error must not exceed & plusmn; 1. 0° C。 Temperature sensing element bimetallic strip around the surface should be smooth, level off, the two kinds of metal joint should be seamless, coating should be uniform, can not have spots, porosity, scratches and other defects. In the range of the relative humidity of 30% ~ 100% humidity value error of instability, namely in the different tendency ( Up or down) After the same humidity, humidity and ventilation psychrometer measured value for the difference between the actual value of the difference, in should not exceed 100% of humidity point & plusmn; 2%, various points in the other should not exceed & plusmn; 5%. When the relative humidity from 30% to 100%, or by 100% to 30%, the humidity of the difference between the variables and the actual value, should not be more than the actual variable & plusmn; 5%, from 90% to 100%, or by 100% to 90%, the humidity in the value of a variable, and should not be more than the actual variable & plusmn; 1/2, temperature and humidity meter recording clock used in addition to the tube size, other technical conditions should comply with the provisions of the ZBY133 standard. In open the temperature and humidity meter shell removed after recording the clock, do not turn to or together automatically, recording the clock at the center of the shaft should be vertical, and the floor when the tip on the recording paper within the scope of the whole row arc, arc should be in accordance with the time line or parallel, the maximum deviation shall not be more than a third of the spacing between adjacent two time, Diary type) Or a quarter ( Zhou ji) 。 Pens should be flat, smooth and elastic, and can make the pen has the appropriate pressure to the recording paper, pen marking should be fluent, not scrape paper line, line width should not exceed 0. 3mm。 The above is the introduction of temperature and humidity meter, know about temperature and humidity meter? If necessary, please consult the instrument in detail.