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The intelligent electromagnetic flowmeter scale daily inspection guide

by:Sincerity     2020-11-27
Abstract: the intelligent electromagnetic flowmeter scale daily inspection guide information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. The intelligent electromagnetic flowmeter daily inspection guidelines is to ensure that the purpose of daily check or running proved electromagnetic flowmeter in controlled condition. Daily check the way general check both online and offline inspection, main is to validate the value of the flow measurement of electromagnetic flowmeter. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the intelligent electromagnetic flowmeter scale daily inspection guide article details. The intelligent electromagnetic flowmeter daily inspection guidelines is to ensure that the purpose of daily check or running proved electromagnetic flowmeter in controlled condition. Daily check the way general check both online and offline inspection, main is to validate the flow of electromagnetic flowmeter measurement values conform to and maintain the desired measurement requirements. Electromagnetic flowmeter in industrial application is given priority to with flow control, the current body more has corrosion resistance and abrasion resistance. More practical applications, the electromagnetic flowmeter failure is due to corrosion leakage, insulation fall, or to foreign bodies caused by electrode. The regular maintenance of the traditional electromagnetic flowmeter is check the flow sensor pipeline cleaning and inspection, and then implement flow calibration. To reduce the flow sensor from the pipe unloading damage on lining, first on line measuring insulation resistance infer presence of abnormal phenomena, such as to determine whether the next step is to unload pipeline inspection or actual flow calibration. General conditional ( Carrying out ISO9001 quality management system) Enterprise inspection ways for: ( 1) And a third will only be used online inspection; ( 2) , 1/3 off line do hydraulic parts after cleaning check; ( 3) And a third offline for flow calibration. One, the concrete operation way of electromagnetic flowmeter is one of the enterprises do a comprehensive inspection every year. Check the content is: appearance inspection, converter characteristic test, measurement calibration, measurement by voltage, measure the insulation resistance, confirm the circuit, etc. Meter check adjustment because of the zero drift, zero point is very important ( “ Online zero & throughout; Must make stops flowing measured medium, actually is not easy to do) 。 Online inspection, therefore, are often omitted contains a check of the operation of the sensor and only implement the converter calibration, so that the online test results and historical data comparison instrument is to continue to use, repair, or update, the excitation coil of sensor is measured insulation resistance degradation decided to update or not. Second, the specific operating mode 2 through online check whether there is any abnormal phenomenon on validation of electromagnetic flowmeter. To can't stop medium flow pipeline check the flow sensor and converter respectively, with analog signals and other common instrument testing converter has higher calibration accuracy ( It depends on the analog signal accuracy) , liquid resistance sensor examination is to test the electrode, including check the excitation coil excitation connecting cable and copper resistance, insulation resistance and check, the excitation current converter output check the indirect methods, such as magnetic field intensity. To stop the pipeline medium flow conditions, from the preset hole into near the sensor, check all the electricity and lining/sedimentary conditions and cleaning. Third, check content check electromagnetic flowmeter, in addition to the zero check, will also flow sensor, converter, and separately from the connecting cable. 1, the machine zero check are the technical requirements for the machine zero check: tube filled with liquid flow sensor measurement and no flow, at the scene of the many companies do not have this condition instead of zero check and adjustment of the machine, but can be turned to the converter separate zero check and adjustment. Technically, this must be the sensor check finished and to ensure that the sensor excitation circuit and signal circuit insulation resistance is normal, All include cable) Premise is of practical significance, otherwise the machine cannot run normally. Normally converter single zero negative value also is very small; If the absolute value is greater than 5% of full scale will need to do first check, wait for after confirm the reason to be adjusted again. Electromagnetic flowmeter zero and converter of the machine normally separate zero difference value is less than 1%. Greater than 5% of the zero difference values have many case the user in the closed pipeline valve caused by incorrect zero operation under adverse conditions. 2, connect the cable to check the inspection content is to check signal and field lines each core conduction and insulation resistance, check whether the shield grounding in good condition. 3, converters, check the check the content is to use general instrument and meter type of analog signals instead of sensors to provide matching flow signal is zero and calibration. Calibration including zero check and adjustment, value examination, excitation current, current/frequency output check, etc. It is important to note: check project should check with the last value ( Or the factory value) Comparison, analysis its whether there is a change or change is in line with the original measurement requirements.
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