Current position > News detail
『Calibration of flow meters』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)
How many years should mechanical flow meters be calibrated? The preparation work for the calibration frequency of mechanical flow meters depends on specific requirements and application environments. Generally speaking, the number of verifications should take into account the following factors: 1. Standards and specifications: According to the standards and specifications of the region and industry, there may be specific requirements and frequencies for calibrating the flow front brightness meter. For example, some standards may require annual calibration, or calibration based on the working silver noise duration or cumulative flow rate under specific operating conditions.
2. Manufacturers Guide: Manufacturers of flow impact meters typically provide recommended calibration times and procedures for their products.
. You can refer to the documents provided by the manufacturer or contact them to learn about the recommended calibration times. 3. Working environment conditions: If the flowmeter is working in a very harsh environment or is prone to measurement errors, it may be necessary to increase the calibration times. For example, high temperature, high pressure, corrosive media, etc. In summary, the number of verifications should follow standard requirements or manufacturer recommendations, and be adjusted appropriately based on the actual working environment and the stability of the flowmeter.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 m
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: