By G. M. S. de Silva
Traceable calibration of attempt and dimension apparatus is a demand of the ISO 9000 sequence of criteria. simple Metrology for ISO 9000 Certification presents crucial info for the turning out to be variety of corporations registered for ISO 9000. Dr. G.M.S. de Silva who has a life of event in metrology and caliber administration fields condenses that wisdom during this precious and useful workbook. The booklet presents a simple figuring out of the rules of size and calibration of measuring tools falling into the next fields; Length,Angle, Mass, strain, strength, Temperature and AC/DC electric amounts. easy innovations and definitions, ISO 9001 specifications and uncertainty determinations also are integrated. comprises labored examples within the textual content and options to difficulties which might be in comparison to actual existence occasions. contains uncomplicated metrology ideas and information that would be important to check and calibration team of workers of their each day paintings. comprises positive factors of the metrology administration constitution which an enterprise must manage which will fulfill ISO 9000 standards.
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Extra info for Basic Metrology for Iso 9000 Certification
Introductory reading 1. V. D. (1983) Engineering Meaurements, Longman Scientific and Technical. 2. W. R. (1990) Metrology for Engineers. Cassell Publishers. Advanced reading 1. National Bureau of Standards NBSIR 76-979 (1978) Intercomparison Procedures for Gauge Blocks using Electromechanical Comparators, US Department of Printing. 1 Introduction Mass measurement is practised widely both in industry and in trade and commerce. Mass is defined as the ‘quantity of matter of an object’. However, the measurement of mass is mostly carried out by weighing, using a variety of balances.
4 Precision polygon Precision polygons are made from hardened and stabilized steel or glass. They have lapped or polished working surfaces normal to equal divisions of a circle. Polygons with 12 faces at 30° intervals or 72 faces at 5° intervals are normally available. Precision polygons are mainly used for calibrating indexing tables and dividing heads. In the calibration of an indexing table the polygon is mounted on the table with its axis coincident with the axis of the table and the table is rotated through the angle of the polygon.
5 Class M3 25 000 10 000 5 000 2 500 1000 500 250 100 50 30 25 20 15 12 10 (Reproduced from OIML RI 111-1994 with kind permission of the International Organization of Legal Metrology) metal or alloy of classes E1, E2 and F1 weights must be practically nonmagnetic. 1. The metal or the alloy of which class M1 rectangular bar weights from 5 kg to 50 kg are made must be no more susceptible to corrosion and no more brittle than grey cast iron. Class M1 cylindrical weights up to 10 kg must be made of brass or of a material of quality at least equal to that of brass.