In the field of pressure gauge calibration, strict adherence to industry specifications and standards is the cornerstone of ensuring the legality and accuracy of calibration work. Different industries and application scenarios may formulate detailed calibration specification details based on international standards such as the requirements for calibration of measuring equipment in the ISO 9001 quality system and national standards of various countries, such as JJG 52 "Elastic Element Type General Pressure Gauge, Pressure Vacuum Gauge and Vacuum Gauge" in China. These specifications cover many aspects from the accuracy level of calibration equipment, the control parameters of the calibration environment, to the specific steps of the calibration method and the criteria for data processing. Calibration institutions and internal calibration personnel of enterprises must study and master relevant specification standards in depth and execute them meticulously during the calibration process. For example, in terms of calibration environment temperature control, some high-precision pressure gauge calibrations require that the environmental temperature fluctuation range is within a very small interval to ensure the reliability and comparability of calibration results. Only by following unified specifications and standards can pressure gauges calibrated by different regions and different institutions have consistency and credibility in measurement data, meeting the needs of industrial production, trade exchanges and quality supervision.