『National standard for electromagnetic flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
What is the national standard for electromagnetic flow meters and which standard are they manufactured according to?
The national standard for electromagnetic flow meters, based on the national industry standard GB4208-76 and the National Electrotechnical Commission standard IEC529-76, specifies the protection level requirements for electrical and electrical product casings. There are several levels of imitation car signal:
1. IP65: For the anti spray type, the electromagnetic flow meter sensor casing allows the water tap to spray water from all directions of the electromagnetic flow meter sensor, with a working pressure of 30Kpa, a water flow rate of 12.5L/s, and a spacing of 3 meters. Secondly, IP67: Electromagnetic flowmeter sensors can be used for short-term immersion in water.
III. IP68: For deep diving type - suitable for long-term work in water or underground under certain working pressure. At this time, the sensor and display information of the electromagnetic flowmeter are partially separated, and a separate electromagnetic flowmeter should be made, but the protection level of the electromagnetic flowmeter must be paid attention to according to the sail damage regulations.
.2. Flow Meter Calibration Regulations
The calibration of different types of flow meters must strictly match the corresponding national/international metrological standards and regulations. The specific calibration requirements are summarized below according to common categories.
Orifice flow meters must comply with JJF 2033-2023 "Orifice Flow Meter Calibration Specification", which covers the entire calibration process of measurement principles, measurement requirements, environmental conditions
2. Electromagnetic flow meters - Conventional electromagnetic flow meters installed in closed pipelines (excluding flow meters for measuring blood, liquid metal, iron ore slurry, open channel flow, as well as plug-in electromagnetic flow meters and electromagnetic water meters) must undergo type evaluation, initial calibration, subsequent calibration, and in-service inspection in accordance with JJG 1033-2007 "Electromagnetic Flow Meter Calibration Regulations". -On site installation of closed pipeline electromagnetic flowmeter online calibration, applicable to JJF 2216-2025 "Electromagnetic flowmeter online calibration specification"; Online calibration of water metering flow meters can also refer to this specification. 3. Vortex flow meters - Standard compliance: Core standards include the International Electrotechnical Commission IEC 60534 series, GB/T 32201-201, JB/T 924, and JJG 198 calibration regulations. -Precision control: Adopting dual standard management of boundary flow points and three section error band control, the repeatability index follows the 1/3 rule; High level instruments need to have dynamic compensation functions such as real-time Reynolds number compensation. -Fluid calibration: Liquid measurement adopts static volume method, weighing method and sets calibration points; Gas traceability adopts the sonic nozzle method, bell jar device, and matching algorithm. -Full condition verification: including core performance verification (instrument coefficient fitting, linearity, repeatability testing) and environmental adaptability verification (temperature cycling, pressure impact testing, a
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