Quality flowmeter nameplate

『Quality flowmeter nameplate』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 allowable accuracy of each instrument? The allowable accuracy range of each instrument depends entirely on its specific type, measurement principle, and design specifications, and there is no unified value. Accuracy is usually clearly indicated by manufacturers in technical manuals, expressed as a percentage of readings, a percentage of full scale, or a fixed value. 1. The typical accuracy range of common instrument types varies greatly due to differences in their application scenarios and technical principles, resulting in significant differences in accuracy levels. The accuracy level of smart energy meters for residential use is usually 1.0 or 2.0, which means that their allowable error ranges are within ± 1% and ± 2%, respectively. High precision electric energy meters used for trade settlement can reach 0.5S or even 0.2S levels. The common accuracy level for ordinary industrial pressure gauges is 1.6 or 1.0 (with an allowable error of ± 1.6% or ± 1.0% of the range). High precision digital pressure sensors or pressure transmitters can achieve an accuracy of 0.1% F.S. (± 0.1% of full scale) or higher. The accuracy of industrial platinum resistance temperature sensors (such as PT100) for temperature instruments, according to the IEC 60751 standard, the allowable error for Class A is ± (0.15+0.002 | t |) ° C, and for Class B it is ± (0.3+0.005 | t |) ° C (| t | is the absolute value of temperature). Standard mercury or alcohol thermometers may have an accuracy of only ± 1 ° C or ± 2 ° C. Flow meters are a field with an extremely wide range of accuracy. The typical accuracy of a vortex flowmeter is around ± 1%, while the accuracy of a Coriolis mass flowmeter used for trade handover can be better than ± 0.1%

2. How to find and confirm the accuracy To determine the accurate allowable error of a specific instrument, it is necessary to consult its official technical documentation. Product nameplate: It usually indicates the accuracy level (such as 1.0 level) or directly indicates the accuracy (such as ± 0.5% F.S.). Factory High Grinding Scale Certificate: The actual calibration error data of the instrument will be provided. • Manufacturers manual: This is the most authoritative source, which will provide detailed information on the accuracy indicators and applicable environmental conditions within different measurement ranges of the front bucket.

3. Core influencing factors: The actual accuracy of the instrument is not fixed and can be affected by multiple factors. • Range: The same meter may have completely different relative errors when measured at 10% and 90% of its range.

. Environmental conditions: Temperature, humidity, electromagnetic interference, etc. can all affect the accuracy of measurement results. Installation and use: Incorrect installation methods (such as residual gas in the pressure gauge and pressure pipe, insufficient insertion depth of the thermometer) can introduce additional errors. The only correct method to determine the accuracy of an instrument is based on the technical specifications indicated by its manufacturer. When selecting and using, it is important to ensure that its accuracy meets your specific measurement needs.

2. How to judge the quality of a mass flowmeter

To judge the quality of a mass flowmeter, zero stability is an important indicator.

『SILVER Official Website SERVICE』