How to write an instrument installation plan

As long as it is a construction plan, anything related to the control system will do

Construction Plan for the Installation of Automatic Control Instruments 1. Introduction to the Professional Technical Forces for Automatic Control 2. General Overview of this Project 3. Construction Arrangements for Key Processes 4. Volume of Construction Work 5. Bases for Construction 6. Construction Preparation 7. Provision of Main Standard Instruments and Tools 8. Main Technical Solutions and Measures 8.1 Individual Testing of Instruments 8.2 Installation of Instrument Pipelines 8.3 Installation of Cable Trays 8.4 Installation of DCS System (1) The installation of the DCS system must be carried out after all works related to the civil structure, electrical systems, air conditioning, cabinet steel foundations, and the grounding system in the control room have been completed. (2) The control room meets the conditions for enclosed management, and both the temperature and humidity inside it are within the requirements of the system. (3) When transporting, care should be taken to protect the DCS system cabinets; the process must be carried out smoothly to avoid severe shocks, and it should be done under the supervision of the relevant personnel from Party A. (4) The model, size, and accessories of the random cable should be complete, its external insulation layer should be undamaged, and its insulation resistance should meet the manufacturer’s standards. (5) The cables between system modules, nodes, and related terminals shall be connected correctly; the connections between network communication cables and bus cables shall meet the design requirements of the manufacturer and the system. (6) Safety grounding and working grounding shall be inspected in accordance with the design drawings and the technical specifications of the system equipment. (7) The grounding of the safety barrier inside the safety barrier cabinet shall comply with the design specifications and the requirements of the intrinsically safe system. (8) Before connecting the power supply lines, carefully check the correctness of the output and input circuits of the power distributor leading to the power control switches of various system devices, as well as verify that the polarity of the power supply is correct. (9) Perform a visual inspection of all peripheral devices. (10) The allowable height deviation between the tops of two adjacent cabinets or control panels is 2 mm; when there are more than two connections, the maximum height deviation of their tops should not exceed 5 mm. The allowable deviation for the flatness at the joint on the front surface of two adjacent cabinets or control panels is 1 mm; when there are more than five such connections, the maximum cumulative deviation for the flatness on the front surface should not exceed 5 mm. The gap at the joints between cabinets should not be greater than 2 mm. (11) A rubber pad should be placed between the DCS cabinet and the steel foundation, and insulating sleeves should be used on the bolts used to fix it to the foundation, in order to ensure that the DCS cabinet remains in a \"floating\" state. (12) After the system is installed, the control room should be kept clean and tidy on a regular basis. (13) Before powering on the system, the construction unit shall, together with representatives from the supervision party, the owner, the design team, and the manufacturer, conduct inspections and verifications of the system’s installation, power supply, grounding, system cables, and wiring. 9. System commissioning 9.1 DCS system commissioning 1) Before powering on the DCS distribution panel, all power switches on the panel and in all cabinets should be set to the “OFF” position. 2) After confirming that all connections are correct, set the power switch to the “ON” position separately. Check whether the power indicator light is working properly. 3) After the DCS equipment hardware is functioning properly, start the operation station to confirm that the system is working correctly, and download the system software, application software, and documentation software from the engineer station. 4) Install the system software and database files on each device. Confirm that the control station shows “OK” on the system status display screen. 5) Check whether the area name, unit name configuration, and the assigned addresses of the control station I/O cards are correct. 6) Conduct circuit tests based on the DCS circuit diagram or wiring diagram to check the operating status of the input points, output points, control points, and calculation points in the control station. 7) Feed a 4–20mA DC signal from the analog input to the corresponding analog input card, increase or decrease the input signal, and verify the response of the PV values in the detail views, groups, and flowcharts. 8) Enter the high and low alarm values for the signal, and verify the changes in PV values and color on the process flow display screen. 9) Input an out-of-range signal and cut off the input signal, then check whether the PV value on the process diagram shows a “—” or “BAD” status message. At the same time, verify the alarm information on the overall alarm display screen, the output from the alarm printer, as well as the sound of the alarm siren. 10) Feed a 4–20mA DC signal into the analog input card corresponding to the relevant address in order to test the single-loop control function; monitor the circuit current using a precision digital ammeter, and verify the address, PV value, and SP value of the controlled point under test. 11) Set the control mode to “Manual,” increase or decrease the input signal value, and check whether the PV value display responds and whether the flowchart changes, while also verifying how the SP tracks the PV value. 12) Set the control mode to “Automatic”, change the SP value, and verify whether the operation mode of the control loop is correct. 13) For the commissioning of control systems such as cascade control systems, interlocks, and sequence control loops, experiments can be carried out in accordance with the requirements of single-loop control. First, set the secondary regulator to the “manual” or “automatic” mode to confirm that the main regulator’s operating function is inactive ； 14) Set the secondary regulator to cascade control (CAS) and the primary regulator to manual mode; increase or decrease the output of the primary regulator to check whether the setpoint SP of the secondary regulator changes. 15) Set the control mode of the main regulator to “automatic,” increase or decrease the set value of the main regulator, and verify whether the operation mode of the secondary regulator is correct. 16) Keep proper records of DCS system commissioning. 9.2 Simulation System Debugging 1) Construction Preparation – Condition preparation: Standard instruments must be within their valid calibration period and possess valid calibration certificates. ——The debuggers possess **certification certificates issued by authorized authorities**. ——The wiring work is complete. ——The DCS power supply system has been put into use. ——Prepare a test light or headphones for calibrating the lines. 2) Line inspection – Steps for checking the wiring: —— Disconnect all the signal wires that are connected in the control room’s DCS terminal cabinet from the terminal blocks as well as from the wiring terminals of the instruments on site. ——For each circuit, use a test light or headphones to check the on/off signal of each dead-loop circuit. ——Verify whether the tag number at the signal wire end is correct. System grounding check: —— Disconnect the connections of the signal shielding grounding and protection grounding inside the cabinet to the external grounding terminals. ——Use the high-resistance setting of a multimeter to check whether the DCS cabinet is in a floating state with respect to the \"ground\". ——Measure the grounding resistance of the shield grounding and the protective grounding using a ground resistance tester, and keep records. ——Reconnect the ground wire. 3) System debugging —— Connect a high-precision digital ammeter with a display of at least 5 digits in series within the system circuit. ——At the on-site signal generation point, an analog signal generator is used to input the values of 0%, 50%, and 100% of its analog measurement range respectively, and the control room of the DCS is used to check whether the system error meets the requirements for system measurement accuracy. ——To improve the accuracy of system debugging, the calculation of systematic error does not take into account the influence of the DCS system itself; instead, the allowable error of the field primary instrument is used as the systematic error of the circuit. ——Parameters such as the range of operation of the level transmitter, the specific gravity of the medium, and the level range should be specified in the system commissioning records. ——For alarm and interlock systems, joint tests should be conducted to ensure correct operation. Before the joint testing, engineering technicians shall provide a parameter table of the interlock operation points in accordance with the design requirements, and the operation parameters shall be set based on this parameter table. ——For the commissioning of control systems such as cascade control systems, interlocks, and sequence control loops, the system should be tested under the condition of simultaneously simulating all the measurement signals within the input system. ——After simulating and debugging a circuit, restore its wiring at both the DCS terminal cabinet and the equipment. ——In conjunction with the DCS system, simulate an input PV value to verify the PV calculation result. Under manual or automatic mode, and with different measurement signals input, the output state of the regulator and tracking experiments are examined. As well as experiments on the operation of control functions such as confirming whether the anti-integration saturation function is activated in the event of a failure in the deviation signal. ——Keep proper records of system debugging. Finally, there are quality and safety measures: safety comes first, and it must be given due attention.

Personnel and equipment. Information is needed for things such as construction schedule planning.

Your question regarding the ordering of a safety barrier cabinet set does not fall under the scope of the instrumentation installation plan; it belongs to the quotation document in the procurement process for instrumentation equipment, also known as the technical specifications.