This article explains in detail the 5-step precision calibration process for the diffused silicon sensor in the DG1300-BZ-A-2-40/CJ/AM/FZ pressure transmitter, covering the key calibration points for JPB-CNM, PBM4, and other series products. A complete solution is provided for industry needs in petrochemicals, energy, and electric power, from environmental setup to zero-point calibration, helping control measurement error within ±0.075%FS. It includes technical parameter comparisons, common troubleshooting, and the professional service advantages of Shenghongchuang Instrumentation, making it an essential guide for technical personnel in the field of industrial flow control.