Before starting the pressure gauge calibration work, sufficient preliminary preparations are the key to ensuring smooth and accurate calibration. First, evaluate and adjust the calibration environment to ensure that factors such as ambient temperature and humidity are within an appropriate range, avoiding calibration errors caused by environmental interference. Second, carefully select matching standard pressure calibration equipment according to the specifications and accuracy requirements of the pressure gauge to be calibrated. These equipment must have high stability and accuracy, and need to be strictly calibrated and zeroed in advance. Moreover, check and prepare various connecting pipes and joints to ensure their good sealing and compatibility with the pressure gauge and calibration equipment. Operators also need to familiarize themselves with the calibration process, operating procedures and relevant safety precautions in advance, and receive professional training if necessary, so that they can carry out the work in an orderly manner during the actual calibration process and minimize the impact of human errors on the calibration results.