Calibration method for constant temperature and humidity test chamber of metrology institute!!!

The temperature and humidity test chamber is used in the fields of electrical appliances, aviation, automobiles, household appliances, coatings, chemical engineering, scientific research, etc. It is mainly used for testing the temperature and humidity environment of industrial parts, main accessories, semi-finished products, electrical, electronic, and other product parts and materials for high temperature, low temperature, cold resistance, humidity and heat or constant tests. Regardless of the measurement accuracy of the constant temperature and humidity chamber, it needs to be calibrated before it is officially delivered for use, both domestically and internationally. How to calibrate a constant temperature and humidity chamber? 1、 Purpose: Standardized verification 2. Scope of use: Suitable for constant temperature and humidity chambers used throughout the company. 3、 Basis for Development: JJF1101-2003 Environmental Testing Equipment Temperature and Humidity Calibration Specification IV. Responsible Person: Metrology Inspector V. Technical Requirements: 1. Temperature; 2. Cement specimen: 20 ± 1 ℃; 3. Concrete specimens at 20 ± 3 ℃; 4. Humidity greater than 90% VI. Inspection items: 1. Temperature deviation 2. Temperature uniformity 3. Temperature fluctuation 4. Relative humidity deviation 5. Relative humidity uniformity 6. Relative humidity fluctuation 7. Inspection equipment 8. Dry wet thermometer 9. Appearance and data 7. Inspection method: 1. Set the upper limit value on the temperature display of the constant temperature and humidity test chamber at 21 ℃ or 23 ℃; 2. The lower limit value is set at 19 ℃ or 17 ℃. 3. Place it in a wet thermometer. 4. Test whether the value on the temperature display is consistent with the thermometer display. 8、 Inspection result processing: If all inspection items meet the technical requirements, they are considered qualified.