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With the widespread use of PLCs and DCS, the use of programmable regulators has decreased; in fact, some instrument technicians have never even seen a programmable regulator, let alone know how to calibrate them. The calibration methods for programmable regulators shared by Changhui Instruments allow technicians to easily carry out this calibration work by following the steps and procedures provided. Programmable regulator yunrun.com.cn/product/2356.html 1. Before debugging the programmable regulator, an electrical check should be performed. The backup power supply, protection battery, as well as the regulator’s LCD display panel, light-emitting diodes, and other status indicator lights should function properly. 2. Activate the self-diagnosis test function of the programmable regulator; if the test passes, use a built-in or external programmer, communicator, or PC to access the system’s function menu in order to check the regulator’s online/offline testing functions, configuration functions, and storage functions. 3. Check the default parameter values set in the technical documents of the programmable regulator; these values should be confirmed and modified in accordance with the requirements specified in the design documents. The checks should be carried out as follows: ① Examine the operator-level parameter settings of the instrument, record the set parameter values, and fill them into the function parameter record sheet for the programmable regulator ； ②Check the master-level parameter settings of the programmable regulator, record the set parameter values, and fill them into the programmable regulator function parameter record sheet ； ③Check the configuration-level parameter settings of the programmable regulator, record the set parameter values, and fill them into the programmable regulator parameter record sheet. 4. The control functions of the programmable regulator and the program verification shall meet the following requirements: ① The selected functional modules shall satisfy the control requirements according to the control scheme ； ②Check that the soft connections between functional modules are correct, and record the connection diagram of the functional modules ； ③Utilize the software functions provided by the programmer, communicator, or PC to develop and enter the corresponding program, then debug the program and fill in the entered program into the record sheet for the programmable regulator function module ； ④Check the parameter settings, calculation formulas, and calculation results of the basic arithmetic functions in the operational function module of the programmable regulator, and they should comply with the provisions in the design documents ； For temperature, pressure compensation, ratio calculation, linearization, etc., simulate the required parameters and check the error between the calculated results and the theoretical requirements ； ⑤Check the functions of the programmable regulator control function module, such as PID control, cascade control, selector control, etc.; the verification methods are the same as those for conventional regulators ； ⑥Check the functions of the input and output modules of the programmable regulator, such as digital filtering, automatic seamless switching, logic output relays, etc ； ⑦Check the parameter settings for the communication function of the programmable regulator; its basic parameters include the baud rate, parity bits, priority, communication address, etc. The inspection method for programmable regulators is based on SH/T3521-2007 \"Technical Specifications for the Construction of Petrochemical Instrumentation Projects\". The programming and configuration methods for programmable regulators vary depending on the manufacturer