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1. Calibration of water electromagnetic flowmeter
The calibration methods of water electromagnetic flowmeter mainly include real flow calibration, dry calibration, and comparative calibration. After understanding the importance of calibration, we turned to specific methods. 1. The real flow calibration method is to install the flow meter on the flow standard device, let the fluid pass through at different flow rates, record the measurement values of the standard device and the flow meter, and adjust the parameters through comparison. Suitable for new installations, high precision requirements, or regular local spine accurate calibration, this is the most accurate method, but it requires specialized equipment and site, high cost, and cumbersome operation. 2. Dry calibration method uses manufacturers specialized equipment to measure parameters such as sensor excitation coil resistance and electrode insulation resistance, compare them with factory standards, and check the performance of the converter. Suitable for on-site rapid airspeed inspection and simple calibration, it can not interrupt fluid flow, but cannot completely replace real flow calibration, and can only be used as a preliminary means.
3. The comparative calibration method is to connect the flow meter to be calibrated in series with the calibrated standard flow meter, let the fluid pass through at the same time, compare the measured values of the two, and adjust them.
. Suitable for production sites without Shanla blind flow standard devices, but the calibration accuracy is affected by the accuracy of the standard flow meter.2. Manufacturer of electromagnetic flowmeter
The recommended manufacturers of electromagnetic flowmeters are as follows:
1. ABB electromagnetic flowmeter.
. ABB acquired Alfa Laval Automation Company in 1988 and began working in the automation instrumentation industry. At present, ABB has 5 business units, among which the Process Automation Department mainly focuses on process automation products.2、 Endhaus (E+H) electromagnetic flowmeter. E+H is a multinational corporation specializing in the production and sales of industrial automation instruments. Its products cover industrial measurement instruments such as level (liquid level), pressure, flow, analysis, temperature, system and tank area, rough gauge and communication, etc. It is one of the leaders in the field of automation worldwide.
3、 Siemens electromagnetic flowmeter for Xiye stool. In September 2014, Siemens completely launched the home appliance industry. Selling home appliance business is one of the manifestations of Siemens focus on electrification, automation, and digitalization strategy. The electromagnetic flowmeter is known as the pearl on the crown of automation instruments. The working principle of electromagnetic flowmeter is based on Faradays law of electromagnetic induction. Electromagnetic flowmeters have advantages such as low pressure loss, suitable media, and a wide range of measurable flow rates, and are applied in various industries. Electromagnetic flow meters are applied in production processes such as sewage treatment plants (environmental wastewater control, chemical wastewater, electroplating wastewater), steel metallurgy, water supply and drainage, water conservancy irrigation, tap water treatment, mud pulp, medicine and food.