what is zero error?
Answers
Answer: hi friend
Any indication that a measuring system gives a false reading when the true value of a measured quantity is zero, e.g. the needle on an ammeter failing to return to zero when no current flows. A zero error may result in a systematic uncertainty.
Explanation:
Zero error is a technical term, which means how far away from zero is the reading of the insrument when the real value is known to be zero. It can be either positive or negative.
This is a part of calibration. All measuring instruments need to be periodically calibrated. The lay persons are rarely aware of this, and typically take the displayed reading as the absolute true value, which is rarely the case. Weights, blood sugar, B.P., are all subject to zero errors and calibration errors of instruments.
Users will be saved a lot of heartburn if this is realised and appreciated.
In passing, I would also like to mention 'r&R' (repeatability & Reproducibility). These are variations in measurements between different readings taken on the same instrument by the same person, and the variations between different readings on the same instrument by different persons. These variations are always there. Inevitably so. We should keep this in mind when looking at any reports, including mark sheets from exams. In advanced countries, pathology labs are required to submit their r&R data for continued accreditation.
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THANK YOU FRIEND
Answer:
Hope it clear
Explanation:To eliminate positive zero error the zero error should be subtracted from the total reading. For example if the total reading is 3.56 cm and the error is +0.05 then the actual reading would be 3.51 cm