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Volume Flow Measurements
Published in Richard J. Goldstein, Fluid Mechanics Measurements, 2017
The following definitions of traceability have been proposed [13]: Traceability is the ability to demonstrate conclusively that a particular instrument or artifact standard has either been calibrated by NBS at accepted intervals, or has been calibrated against another standard in a chain or echelon of calibrations, ultimately leading to a calibration performed by NBS.Traceability to designated standards (national, international, or well-characterized reference standards based upon fundamental concepts of nature) is an attribute of some measurements. Measurements have traceability to the designated standards if and only if scientifically rigorous evidence is produced on a continuing basis to show that the measurement process is producing measurement results (data) for which the total measurement uncertainty relative to national or other designated standards is quantified.Traceability means the ability to relate individual measurement results to national standards or nationally accepted measurement systems through an unbroken chain of comparisons.Traceability implies a capability to quantitatively express the results of a measurement in terms of units that are realized on the basis of accepted reference standards, usually national standards.
In-Process Measurement in Manufacturing Processes
Published in Wasim Ahmed Khan, Ghulam Abbas, Khalid Rahman, Ghulam Hussain, Cedric Aimal Edwin, Functional Reverse Engineering of Machine Tools, 2019
Ahmad Junaid, Muftooh Ur Rehman Siddiqi, Riaz Mohammad, Muhammad Usman Abbasi
As this research focuses on real-time measurements of the workpiece during the manufacturing process, using a different measurement technology gives more precise and accurate results without disturbing the manufacturing process. MVS is one of the non-contact-based measurement techniques that can be used for metrology operation. Different image processing tools can be applied using Matlab for analysis. In manufacturing industries, calibration is one of the most important factors used for obtaining a precise result of measurement of the manufactured part. For example, coordinate measuring machine performs frequent calibration to maintain the performance and accuracy of the system. Adjustment is basic in the assembling business to keep up the hardware’s execution and precision. Calibration is one of the critical factors in the manufacturing industries to maintain instrument accuracy and performance. It is very important for quality assurance. Calibration helps to design the product closer to the required features and with right measurements. The calibration process consists of finding the relationship between standard measurement and the instrument measurement to ensure whether the instrument reading lies within the tolerance range of the standard measurement. The importance of calibration cannot be ignored in the manufacturing industry. If any instrument produces incorrect measurements, the final product will be of low quality and faulty. Instrument calibration is affected by many factors such as vibration, electric shock, and changes in the weather condition. The quality of measurement can be determined by using the calibration. In the manufacturing, process calibration helps to produce high-quality products. Some of the important calibration parameters are tolerance, accuracy, and traceability.
Transducer
Published in Francis S. Tse, Ivan E. Morse, Measurement and Instrumentation in Engineering, 2018
Calibration serves to reveal the individuality of an instrument. An instrument is “traceable” if the standards for calibration can be traced to the National Bureau of Standards. The certificate of calibration, however, is only a reference and should not be accepted as legal tender for the instrument to measure accurately. Due to different in-service conditions, when an instrument works well for one application, there is no assurance that it will perform adequately for another, despite the proven performance and certificate of calibration.
Metrological Assurance and Standardization of Advanced Tools and Technologies for nondestructive Testing and Condition Monitoring (NDT4.0)
Published in Research in Nondestructive Evaluation, 2020
Kirill V. Gogolinskiy, Vladimir A. Syasko
A diagram describing the structure of the NDT system, including elements of calibration, verification, and validation, is presented in Figure 2. The following elements of NDT qualification system are proposed in this scheme: Ensuring the traceability of measurement information obtained during inspection procedures to the primary standards (calibration) to ensure the unity and reliability of the source data.Technical and methodological solutions that ensure self-monitoring and self-calibration of primary measuring transducers (intelligent sensors).Qualification of inspection procedure based on comprehensive tests on real objects or test specimens (reference blocks).Metrological support and verification of methods for interpreting received data, including sensor digital models.Metrological support and validation of computational models (digital twins) of inspected objects.
Role of Analytical Instruments in Forensic Science: A Pedagogical Approach
Published in IETE Journal of Education, 2019
Nilimamayee Samal, Subhransu Padhee
Instrument calibration is one of the primary processes to maintain the desired accuracy of the instrument under different ambient and working condition. Calibration is the process of comparison between a standard and a working instrument. Calibration is carried out in the following condition: Calibration for new instrumentCalibration after a specified period of time (either time period or operating usage)Calibration after repair of instrumentCalibration after a new modified standard
Global solar radiation estimation from measurements of visibility and air temperature extremes
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
Traceability chain of the measuring devices ensures a measurement result is related to references at the higher levels, ending at the primary standard. An end user may obtain traceability from a National Metrology Institute or a secondary calibration laboratory. Ensuring the traceability of a measurement is the calibration of the measuring instrument. Calibration determines the performance characteristics of an instrument. Calibration is applied to the measuring instruments to establish and demonstrate traceability, determine the accuracy of the instrument readings, establish the reliability of the instrument (Metrology-in short 2008). Calibration is the best way to determine the characteristics of a measurement result. The datasets used in this study were obtained from the State Meteorological Institute. The Republic of Turkey has appointed State Meteorological Institute, as the official organization for making meteorological measurements. The State Meteorological Institute has a calibration laboratory accredited by the Turkish Accreditation Agency, and calibrations of devices used in meteorological measurements are performed in this laboratory. The meteorological measurements made by the State Meteorological Institute are traceable to national standards. Therefore, the data sets used in this study were considered reliable.