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1. Ultrasonic flowmeter parameters
The core parameters of an ultrasonic flowmeter include measurement accuracy, repeatability, measurement range, flow rate range, operating temperature, pressure level, signal output, and communication protocol. These parameters directly affect the performance and applicable scenarios of the instrument. 1. Performance parameter measurement accuracy: usually ± 0.5%~± 1.0%, high-precision models can reach ± 0.2% repeatability: generally ± 0.1%~± 0.3%, better than accuracy indicators measurement range: pipe diameter covers DN15~DN6000, suitable for various pipeline sizes flow rate range: -32m/s~0~+32m/s (two-way measurement first band), specific models can reach 40m/s. 2. Operating parameters working temperature: -40 ℃~+200 ℃ (standard type), high temperature type can reach+400 ℃ Pressure level: PN16~PN420, high pressure type supports 25MPa or more Protection level: IP65 (Xiqin Qing dustproof and waterproof), IP67 (anti immersion), IP68 (submersible type) Medium requirements: turbidity<10000mg/L, bubble content<2% (Affects measurement accuracy) 3 Output and communication signal output: 4-20mA analog output, pulse/frequency output, switch alarm output Communication interfaces: RS-485 (Modbus, HART), PROFIBUS-DP, Ethernet interface Power supply: DC 8-36V or AC 85-265V, low-power battery power supply up to 5 years Installation and environmental sensor types: external clamp type (non-contact), plug-in type (drilling installation), pipe section type (flange connection). Installation requirements: The front and rear straight pipe sections must meet the requirements of front 10D and rear 5D (D is the pipe diameter). Environmental temperature: -30 ℃~+70 ℃ (working temperature of electroni
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2. What is the difference between the measurement accuracy and flow accuracy of an ultrasonic flowmeter?
The measurement accuracy and flow accuracy of an ultrasonic flowmeter are different expressions of the same concept, without actual differences, both referring to the accuracy of the flowmeter in measuring fluid flow.
. 1. Conceptual analysis: Measurement accuracy and flow accuracy usually refer to the same technical indicator in the field of flow meters, that is, the error range between the flow meter reading and the true fluid flow rate. This error is usually expressed in the form of a percentage of value error (such as ± 1%) or a percentage of measured value over the full range (such as ± (1%+0.5% FS)).2. Common expressions in practical product manuals, technical standards, and engineering applications can be interchanged: - Some manufacturers and standards (such as JJG 1030-2007 "Ultrasonic Flow Meter Sleeve Calibration Regulations") tend to use "flow accuracy" or "precision" - there are also technical literature and user habits that refer to it as "measurement accuracy". Both focus on the accuracy and reliability of flow measurement.
3 The key parameters that need to be distinguished, although "measurement accuracy" and "flow accuracy" are synonymous, should be noted in practice to disti