Calibration Of Measuring Instruments Pdf

Calibration is a comparison between a known measurement the standard and the measurement using your instrument.

Calibration of measuring instruments pdf.

Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and covered mass length and volume calibrations for field. A calibration can be executed e ither on a measuring instrument or system or on a measurement standard. 2 here is an introduction to a quick reference of reference gages that can be used as calibration standards and inspection tools available from mitutoyo as appropriate for maintaining the accuracy of precision measuring tools and instruments. The following explains the basic concepts with respect to calibration.

Typically the accuracy of the standard should be ten times the accuracy of the measuring device being tested. Measurement standards traceable to international or national measurement standards. Where no such standards exist the basis used for calibration or verification shall be recorded. In accordance with the ranking order of the standards from the.

The calibration of a measuring instrument allows d etermining the deviation of the. However accuracy ratio of 3 1 is acceptable by most standards organizations. 5 1 a record is maintained of all repair and calibration action performed on the instrument. Calibration of measuring sensors and instruments.

Values of the measuring instrument used or a measurement standard are compared over one or several stages to this standard. Nbs handbook 145 1986 handbook for the quality assurance of metrological measurements by john k. Calibration in its most basic form is the measuring of an instrument against a standard. Calibration of measuring instruments on a coordinate measuring machine 131 calibration of reference gauge blocks by interferometry u 0 02 µm 0 2 10 6 l substitution measurement on cmm u 1 8 µm 4 10 6 l calibration of gauge rings u 0 4 µm 3 1 10 6 l calibration of thread ring pitch diameter.

At each of these stages calibration with a standard pre viously calibrated with a higher ranking standard is carried out. When calibration is successfully completed a calibration sticker is affixed to the instrument which contains the date the calibration was completed and the date the instrument is due for recalibration. This document focuses on the determination of calibration intervals of measuring instruments.