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This post was last edited by qy576100527 on 2017-6-1 23:18. System Startup (VIII) – Instrument Inspection and Calibration: After the factory installation is complete, before conducting chemical process trials with the system, it is necessary for the instrument technicians and operators to work together to carry out a thorough inspection and calibration of the entire instrument system. The main contents of instrument inspection include: (1) According to the design drawings, check the installation locations of various control instruments and measuring instruments (including analytical instruments) to ensure that no items are missing ； (2) Check the installation and material of various components of the instrument ； (3) Check the range and installation direction of various instrument components (such as flow orifice plates and flow-limiting orifice plates); special attention should be paid to ensuring that the insertion depth of the temperature sensing elements matches the design specifications ； (4) Check the instrument air supply and power supply ； (5) Check the installation, specifications, type of each automatic valve, as well as the operation of the valves ； (6) Conduct tests on the alarm functions of various instruments ； (7) Inspect the emergency shutdown system and conduct tests if necessary to verify the accuracy and reliability of the automatic protection devices ； (8) During the calibration of the instruments, it is necessary to keep proper records of the calibration of each instrument as well as the shutdown protection system.