Abstract: In the field of room air conditioner performance testing, the air enthalpy measurement device is one of the core equipments. Its measurement accuracy directly determines the reliability of the test results for air conditioner performance parameters. To ensure the accuracy and long-term stability of the air enthalpy measurement device, GB/T 7725—2022 Room Air Conditioners requires that a calibration test must be conducted at least every 6 months. Based on this requirement, a calibration test device was developed. Data verification and analysis were carried out on a set of air enthalpy measurement devices that have passed the inspection of authoritative institutions. It has been verified that when the temperature difference between the inlet air and outlet air is within the range of 6 ℃~15 ℃, the calibration test device can complete the calibration test accurately. When the temperature difference exceeds this range, the calibration result is unqualified.

Key words: Air enthalpy method, Calibration device, Air conditioning testing