Calibration Of Measuring Instruments Pdf

Measurement standards traceable to international or national measurement standards.

Calibration of measuring instruments pdf. Nbs handbook 145 1986 handbook for the quality assurance of metrological measurements by john k. A calibration can be executed e ither on a measuring instrument or system or on a measurement standard. At each of these stages calibration with a standard pre viously calibrated with a higher ranking standard is carried out. The calibration of a measuring instrument allows d etermining the deviation of the.

Values of the measuring instrument used or a measurement standard are compared over one or several stages to this standard. Calibration of measuring sensors and instruments. 5 1 a record is maintained of all repair and calibration action performed on the instrument. The following explains the basic concepts with respect to calibration.

However accuracy ratio of 3 1 is acceptable by most standards organizations. Oppermann is out of print and the majority of content has been updated and published in the publications noted below. 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. Calibration in its most basic form is the measuring of an instrument against a standard.

In accordance with the ranking order of the standards from the. Where no such standards exist the basis used for calibration or verification shall be recorded. 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. This document focuses on the determination of calibration intervals of measuring instruments.

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. Typically the accuracy of the standard should be ten times the accuracy of the measuring device being tested. Calibration is a comparison between a known measurement the standard and the measurement using your instrument.