Standard JJF 1101-2019 specifies specifications for calibrating temperature and Humidity parameters for environmental test equipment (e.g. drying ovens, incubators, climate aging boxes, etc.) with a Temperature range of -80 ° C to 300 ° C and Humidity range of 10% RH to 100% RH. This specification applies to ensure the accuracy and Stability of temperature and Humidity parameters for environmental test equipment during testing. The standard specifies in detail the scope, referenced documents, terms and definitions of calibrate and emphasizes the use of standardized test methods and equipment calibrate procedures to guarantee Reliability and comparability of test results. Before calibrating equipment using this standard, it is necessary to confirm and comply with the relevant requirements in the referenced documents, including the stable state of the equipment, the deviation control of the temperature Humidity in the working space, to ensure that the calibrating process meets the standard requirements and can provide reliable test data.