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1. National Metrology Verification Regulation JJG897 Original
The National Metrology Verification Regulation JJG897 mainly includes the verification regulations for mass flow meters. The following is a brief overview of the regulation: Scope of application: This regulation is applicable to the calibration of newly manufactured, used, and repaired mass flow meters. It ensures the accuracy and reliability of these flow meters when measuring mass flow. Technical requirements and verification items: Appearance and random document requirements: The regulations stipulate the appearance of the quality flowmeter, including its structure, identification, nameplate, etc., and require the provision of complete random documents such as instructions and certificates of conformity. Pressure resistance strength: Mass flow meters need to withstand a certain pressure without leakage or damage. The regulations provide detailed testing methods and standards for pressure resistance strength. Other calibration items: In addition to the above two items, the regulation also includes multiple other calibration items, such as repeatability, stability, zero drift, etc. of the flowmeter, to ensure accurate measurement under various working conditions. Ways to obtain the original text: Due to the lengthy content and involvement of professional technical details, it is recommended to obtain the complete original document through official channels or professional databases. These channels typically provide authoritative and up-to-date versions of regulations, which helps ensure the accuracy and compliance of calibration work. In summary, the National Metrology Verification Regulation JJG897 is an important basis for the verification of qua
2. Accuracy level of flow meter
Generally speaking, the accuracy level of a flow meter refers to a percentage, that is, level 2.5 represents its allowable error of ± 2.5%. The accuracy of a flow meter for atmospheric infiltration sampling cluster is considered relatively low.
. At present, the accuracy of the main flow meters is generally between 0.2 and 1.0. And 1.5~2.5 is relatively poor. The accuracy varies depending on the flow meter and the measuring medium. The measurement accuracy of liquids is better than that of gases, and the measurement accuracy of gases is generally greater than level 1.0. For more knowledge about flow meters, please visit Shanghai Tianshi for more details.3. Calibration of Large Diameter Electromagnetic Flowmeters
Calibration of Large Diameter Electromagnetic Flowmeters Large diameter electromagnetic flowmeters are instruments used to measure the volumetric flow rate of conductive liquids, and their calibration is an important step in ensuring measurement accuracy and reliability.
. The following is a detailed explanation of the calibration of large-diameter electromagnetic flowmeters:1. Purpose of Calibration The main purpose of calibrating large-diameter electromagnetic flowmeters is to verify whether their measurement performance meets the specified technical requirements, including measurement accuracy, stability, repeatability, and other aspects. Through calibration, problems with flow meters can be promptly identified and resolved, ensuring their accuracy and reliability in practical applications.
2. Verification Met
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