Last time, we discussed accuracy vs. uncertainty and how the two definitions can be misinterpreted. But what about the types of accuracy specifications? ??♂? ??The two most common terms that represent the accuracy of an instrument are % of reading and % of full scale. % of full scale is constant, meaning the accuracy is expressed as a percentage of the maximum value the instrument can measure (full scale). For example, if a pressure sensor has a full scale of 100 psi and an accuracy of 1% FS, the maximum error is one psi (1% of 100 psi) across the entire measurement range. % of reading, however, is dynamic and varies with the reading. The accuracy is expressed as a percentage of the actual measured value, AKA the error changes proportionally with the reading. For instance, a flowmeter with an accuracy of 0.5% RD has an error of 0.25 units at a 50-unit flow rate. (0.5% of 50 units). ?? Here's the catch: many instrument manufacturers blend % of reading with % of full scale in their specifications, leaving users scratching their heads. ?? That's why Mensor uses Intelliscale accuracy. Curious about what that means? Stay tuned for next week's carousel! ?? #mensor #wikagroup #metrology #intelliscaleaccuracy
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