The purpose of this paper is to review the essential definitions, roles and characteristics of communication on metering system. We discuss measurement, data acquisition and metrological control of a signal sensor from dynamic metering system. After that, we present instruments of sensor communication with more detailed discussions to the reference standards and the important fundamental parame...

In this paper the principle and device NME 90 for large square standards calibration is described. The self-calibration methods of measurement are used. They allow very low uncertainty of the square calibration with mathematical elimination of measuring column straightness deviations. The process of measurement is full automated and controlled by PC, which collects and evaluates measured data. ...

Working standards for dissipation factor (D) obtained by connecting a shielded three-tenninal capacitor in series with a shielded precision resistor have been developed for calibration purposes. Precision conductance boxes have been built for use with a single three-tenninallOOO pF gas capacitor standard to create dissipation factor standards having values from 2 x 10-5 to 1 X 10-2. The design ...

This issue of the Journal of Research of the National Institute of Standards and Technology resulted from a one-half day seminar devoted to descriptions of the current status of the metrology of radon in international laboratories specializing in that area. The seminar, held June 5, 1989, at the Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Federal Republic of Germany was co-sponso...

In the context of clinical trials, calibration protocols for optical instruments that ensure measurement accuracy and the ability to carry out meaningful comparisons of data acquired from multiple instruments are required. A series of calibration standards and procedures are presented to assess technical feasibility of optical devices for cervical precancer detection. Measurements of positive a...

This document describes the procedures used at NIST to calibrate dc voltage standards in terms of the NIST volt. Three calibration services are offered by the Electricity Division: Regular Calibration Service (RCS) of client standard cells at NIST; the Volt Transfer Program (VTP) a process to determine the difference between the NIST volt and the volt as maintained by a group of standard cells ...

ISO 9001 (ISO 1987) certification issues are bringing-out calibration anxieties. The rush to document calibration intervals for certification purposes is often driving-up costs. Both instrument manufactures and calibration services are benefiting financially from calibration anxiety brought on by “ISO systems requiring you to say what you do and do what you say to meet the ISO specifications”. ...

Calibration laboratories can choose from a variety of frequency standards, including quartz oscillators, atomic oscillators, and oscillators disciplined to agree with reference signals from the Global Positioning System (GPS) satellites or other sources. The frequency calibration and measurement capability of a laboratory is largely determined by the type of primary frequency standard* that is ...

In this paper, we demonstrate for the first time a TRL calibration kit fabricated in CMOS technology. To fulfill a basic requirement of high probe-isolation of the TRL method, we have based all fabricated calibration standards on a shield-based measuring fixture that heavily reduces the effects of the semiconducting substrate. We analyze the electrical performance of the standards, including th...