CHARACTERIZATION OF DEAD WEIGHT TESTERS AND COMPUTATION OF ASSOCIATED UNCERTAINTIES: A CASE STUDY OF CONTEMPORARY TECHNIQUES<br />
Journal Title: Metrology and Measurement Systems - Year 2007, Vol 14, Issue 3
Abstract
Estimation of uncertainty associated with pressure, measured by a dead weight tester is a key issue of recent times in pressure metrology. Though two different techniques have been used in the past yet there has been little uniformity in the way in which the measurement uncertainties of dead weight piston testers are evaluated and expressed. One of the techniques described in EAL document follows the universal approach based on ISO Guide and the relatively recent approach described in the National Accreditation Board of Laboratories (NABL-141) document presents a method for evaluating uncertainty in pressure measurement using dead weight testers through statistical analysis and error evaluated through linear curve fitting. This method is though in line with ISO Guide on the expression of uncertainty in measurement but differs from the traditional uncertainty measurement computations. The present paper describes a comparative study of these two different approaches through a case study carried out on an industrial dual range simple type dead weight tester. The paper also highlights some of the facts: how the new estimates affect pressure measurement and their commercial implementation and the benefits over traditional estimates.
Authors and Affiliations
SANJAY YADAV
Keywords
Related Articles
- EP ID EP96830
- DOI -
- Views 60
- Downloads 0
IMPROVEMENT OF GLASS BREAK ACOUSTIC SIGNAL DETECTION VIA APPLICATION OF WAVELET PACKET DECOMPOSITION<br />
The main subject of the authors' research are non-contact methods of glass break detection based on analysis of the acoustic signal generated during the event. This problem has essential meaning for modern cost-effective...
UTILIZATION OF LEVENBERG-MARQUARDT'S METHOD FOR IDENTIFICATION OF THE ELECTRONIC CURRENT TRANSDUCER WITH A HALL EFFECT SENSOR IN A FEEDBACK LOOP
The utilization of Levenberg-Marquardt's method (LM) for the identification of an unknown model parameters of the electronic current transducer with a Hall effect sensor in the negative feedback loop has been described....
A MULTI-METHOD APPROACH TO MEASUREMENT OF RESPIRATORY SYSTEM MECHANICS
A multi-method system developed for complex investigations of lung mechanics is described. The system includes complementary measurement techniques such as forced oscillations, interrupter technique, methods for measurem...
DYNAMICS OF CONTACT THERMOMETRIC SENSORS WITH ELECTRIC OUTPUT AND METHODS OF ITS IMPROVEMENT
The paper deals with selected aspects of modelling dynamic properties of contact thermometric sensors and reducing the dynamic error occurring in measurement of time-variable temperature as well as in measurement of cons...
THE EFFECT OF DOUBLE VENTURI'S STRUCTURAL PARAMETERS ON THE REINFORCEMENT VALUE AND FLOW COEFFICIENT
Reinforcement factor of a double Venturi is one of the more important parameters related to sensor shape and structure. The evaluation and the effect of the double Venturi's structural parameters on its value were carrie...