Temperature and humidity meter measuring performance requirements

< p> 1 error value < / p> < p> according to the actual situation of temperature and humidity meter the production and use, to determine the maximum allowable temperature error: plus or minus 2 ℃. Humidity as: of error of plus or minus 5% RH ( 40% rh ~ 70% rh, 20℃) 、± 7%RH( Above or below 40% RH to 70% RH, 20 ℃) 。 This is considering the following reasons: < / p> < p> a, the current domestic manufacturers of mechanical factory index of temperature and humidity meter is generally used in industry as: + / - 5% RH, plus or minus 1 ℃ ~ + 2 ℃. < / p> < p> b, industrial environment humidity range, generally between 40% RH to 70% RH, temperature generally at about 18 ℃ to 25 ℃, the range of temperature and humidity requirements is higher. < / p> < p> c, hair and other mechanical hygrometer are low-grade equipment, generally does not apply to low humidity and high temperature and high humidity and other special occasions. < / p> < p> d, relative humidity of the parameters on the temperature dependence, so the technical index of the relative humidity should be presented under a certain temperature. < / p> < p> 2 wet/temperature hysteresis error return difference < / p> < p> temperature return difference as: 0. 5℃; Wet hysteresis error was: 3% RH. 3 repetitive < / p> < p> < / p> < p> as the temperature of 0. 5 ℃, humidity 2% RH. < / p> < p> chaozhou li electrical appliance factory specializing in the production of light a night light, temperature and humidity meter, LED rechargeable small desk lamp. < / p> < p> the article source: li 3 c electric light a night light ea - gl。 com/ < / p> < p> < / p>
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