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This post was last edited by hdyqyb on 2019-2-21 09:57. The integrated orifice plate flowmeter is a differential pressure flow measurement device with a high range ratio, consisting of a standard orifice plate in combination with a multi-parameter differential pressure transmitter (or separate differential pressure transmitter, temperature transmitter, and pressure transmitter). It can be used to measure the flow rate of gases, steam, liquids, and natural gas, and is widely applied in process control and measurement in fields such as petroleum, chemicals, metallurgy, power generation, heating, and water supply. Even the best instruments require repair and maintenance. The Instrument Technology Department of Jiangsu Evergrande has summarized eight key points for the maintenance of integrated orifice plate flowmeters. I. Mechanical first, then electrical – Electrical checks should only be carried out after confirming that the mechanical components are free of faults. When checking for circuit faults, testing instruments should be used to locate the faulty area. Once it is confirmed that there are no issues with poor connections, the relationship between the circuits and the mechanical components should be examined carefully to avoid misdiagnosis. II. Speak before acting – For faulty electrical equipment, one should not rush to take action; instead, one should first inquire about the sequence of events leading to the fault and the symptoms of the issue with the integrated orifice plate flow meter. For unfamiliar equipment, it is also necessary to first become familiar with the circuit principles and structural features, and to follow the relevant rules. Before disassembly, it is necessary to fully understand the function, location, connection method of each electrical component, as well as its relationship with other surrounding components. In the absence of assembly diagrams, sketches should be drawn while disassembling, along with appropriate markings. III. External first, then internal – First, check whether the equipment has any obvious cracks or defects, and learn about its repair history and service life, before proceeding to inspect the interior of the device. It can only be disassembled after it is determined to be an internal fault; otherwise, blind disassembly may worsen the condition of the equipment. IV. Static first, then dynamic – Before powering on the equipment, check the condition of its buttons, contactors, thermal relays, and fuses in order to determine where the fault lies. Conduct a power-on test, listen to the sounds, measure parameters, determine the fault, and finally carry out repairs. In the case of a motor with an absent phase, when it is not possible to determine the phase status by measuring the three-phase voltages, one should listen to the sound generated; by measuring the voltage of each phase relative to ground separately, it is possible to identify which phase is missing. V. Start with the peripherals before dealing with the internal components – do not rush to replace the damaged electrical parts; wait until it is confirmed that the circuits of the peripheral devices are functioning properly before considering replacing the damaged electrical components. VI. DC first, then AC – When maintaining an integrated orifice flow meter, it is necessary to first check the static operating point of the DC circuit, and then check the dynamic operating point of the AC circuit. VII. Fix the fault first, then perform debugging – For electrical equipment that has both faults and issues that need to be addressed, the faults should be resolved first before debugging can take place; debugging must be carried out under the condition that the electrical circuits are functioning properly. VIII. Clean first, then repair – For electric equipment that is heavily polluted, clean its buttons, wiring points, and contacts first, and check whether the external control buttons are malfunctioning. Many faults are caused by dirt and conductive dust particles, and the fault is often resolved once cleaning is done. If the problem persists after cleaning, it can be repaired. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content!