دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a standard recognised by an official national decision as the basis for fixing the value. in a country. of all other standards of the given quantity. In general. the national standard in a country is also the primary standard.

n: a particular measure with the highest metrological qualities in a given field. Never used directly for measurement other than for comparison with duplicate standards or reference standards. Compare secondary standard, working standard.

n: a standard die value of which is fixed by direct or indirect comparison with a primary standard or by means of a reference-value standard. Compare primary standard. working standard

n: 1. a measuring instrument intended to define, to represent physically. or to reproduce the unit of measurement of a quantity (or a multiple or submultiple of that unit) to transmit it to other measuring instruments by comparison. See also primary standard, secondary standard, working standard. 2. a prescribed set of voluntary rules. conditions. or requirements concerned with the definition of terms;classification of component;delineation of procedures;specification of dimension;construction criteria;materials;performance;design;or operations;measurement of quality and quantity in describing materials, products, systems, services, or practices;or description of fit and measurement of size.

n: the relation of a prover or a transducer calibration, through a step-bystep process, to an instrument or group of instruments calibrated and certified by a national or international primary standard.

the ability to trace the components of a product through out the supply and manufacturing system from raw material to finished and installed product.

n: a standard that is calibrated against a reference standard and is intended to verify working measuring instruments of lower accuracy. Compare primary standard, secondary standard.