Adjustment – what for? Why should meters be adjusted? adjustment (of a measuring instrument) Definition of adjustment according to the International Dictionary of Legal Metrology Terms (Central Office of Measures. Warsaw, 2015) An activity aimed at bringing a measuring instrument to a state of operation corresponding to its intended use. Adjustment may be automatic, semi-automatic or manual. •    Automatic adjustment – a set of operations performed without

Introduction  In accordance with the requirements for measuring processes and equipment, a periodic inspection of the measuring equipment is imposed. Such periodic metrological control of measuring instruments is the calibration and the issued document is the calibration certificate. However, the issue of a calibration certificate alone does not decide whether the instrument is suitable for measurement or not. The calibration certificate is only a statement of the metrological condition

Adjustable electrical resistance measures (resistance boxes) have been used for long time in metrology for adjustment and calibration of electrical resistance meters. In practice they represent in-series set of individual resistors, which may be switched on to the circuit or switched off from it thus adjusting total resistance. In spite of apparent engineering minimalism of this equipment important technologies and original engineering solutions are hidden in a case of resistance box. The fir

Currently, the market for measurement services is witnessing an increase in the importance of accreditation, resulting mainly from increasing quality requirements. Calibration certificates issued by accredited laboratories are objective evidence of best practice. The most important thing for the customer is the metrological confirmation of the device's efficiency. The user of a given meter needs for himself and his contractors to provide reliable indications, which will be within the lim