Calibration Of Measuring Instruments Pdf

The following explains the basic concepts with respect to calibration.

Calibration of measuring instruments pdf. At each of these stages calibration with a standard pre viously calibrated with a higher ranking standard is carried out. Calibration in its most basic form is the measuring of an instrument against a standard. Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and covered mass length and volume calibrations for field. Oppermann is out of print and the majority of content has been updated and published in the publications noted below.

As instruments become more complicated successfully identifying and applying best practices can reduce business expenses and improve organizational capabilities. Where no such standards exist the basis used for calibration or verification shall be recorded. Taylor and henry v. Calibration of measuring sensors and instruments.

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. Values of the measuring instrument used or a measurement standard are compared over one or several stages to this standard. This document focuses on the determination of calibration intervals of measuring instruments. Typically the accuracy of the standard should be ten times the accuracy of the measuring device being tested.

The calibration of a measuring instrument allows d etermining the deviation of the. Measurement standards traceable to international or national measurement standards. Nbs handbook 145 1986 handbook for the quality assurance of metrological measurements by john k. However accuracy ratio of 3 1 is acceptable by most standards organizations.

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. A calibration can be executed e ither on a measuring instrument or system or on a measurement standard. In accordance with the ranking order of the standards from the.