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Quality of measurements on the graduated scales  Просмотрен 253

Quality of single measurement

Uncertainty of the amendment. Uncertainty of value of the measured size. Indicators of quality of single measurement - accuracy and correctness.

Quality of repeated measurement

Uncertainty of counting. Uncertainty of the indication. Uncertainty of the amendment. Uncertainty of value of the measured size. Indicators of quality of repeated measurement - accuracy and correctness - at ravnotochny and neravnotochny values of counting.

the raduirovka of measuring instruments (German graduiren — to graduate, lat. gradus — a step, a step, degree) — metrological operation by means of which a gage (a measure or the measuring device) supply with a scale or the calibration table (curve). Marks of a scale should to correspond with demanded accuracy to values of the measured size, and the table (curve) with demanded accuracy to reflect effect communication in a device exit with the size brought to an entrance (for example, dependence of EDS of the thermocouple of a pyrometer on temperature of her worker spy).

 

Graduation is made by means of more exact, than graduated, measuring instruments according to which indications establish the valid values of the measured size. Exact measuring instruments are graduated individually, less exact are supplied with the standard scale printed in advance, or the standard table (curve) graduation. Application of standard scales or the standard graduated tables demands sometimes adjustment of measuring instruments for the purpose of finishing of their errors to established by norms.

 

Control questions:

1. Quality of single measurement

 

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