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This is the measurement recorded when, in fact, it should be 0. It is the measurement when there is nothing to measure but the reading is not exactly 0 because the calibration has gone off.
Take a measurement with nothing in the gauge. That reading is the zero-error.
the correction which is made to get correct measurement after zero error
Zero error in an Essae weighing machine refers to the condition where the scale does not read zero when there is no weight on the platform. This error can occur due to mechanical misalignment, calibration issues, or wear and tear of the components. It is important to identify and correct zero error to ensure accurate measurements, typically by adjusting the zero balance or recalibrating the machine before use. Regular maintenance and calibration help minimize zero error and improve weighing accuracy.
The scale doesn't start at zero, so you need to compromise or you get a systematic error.