B. Blanc, F. Beaudoux
The gravimetric method for standard leak calibration is already documented and has proven to be repeatable. However, neglecting the air buoyancy correction in some cases may lead to a significant increase of the uncertainty and a bias on the result. The aim of this work is to provide a method for atmospheric leaks calibration using simple mass comparisons and the Monte Carlo method in order to determine the associated uncertainty and check the validity of the GUM approach in specific cases. The main objectives are to provide a guideline on how to quickly and simply calibrate such equipment...
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.034
· Download
C. Schlegel
This article describes the behaviour of setting-type torque screwdrivers. In contrast to setting-type torque wrenches, such screwdrivers have multiple setpoints that can be quite different from those of torque wrenches. This fact has a crucial impact on their calibration. The current article focuses on the determination of the setpoints as well as on the statistical behaviour of the data. It further presents initial measurements obtained from various screwdrivers.
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.031
· Download
C. Müller-Schöll, D. Goessi
This paper promotes the artefact method for determining the air density for weighing and mass calibrations in industrial mass calibration laboratories. Artefact prototypes were manufactured and air density was determined using these artefacts for a proof of concept. Uncertainties are in an acceptable size. Comparison to the traditional method (measurements of air pressure, temperature, and humidity) shows agreement within uncertainties. Substantial economic advantages of the artefact method are identified compared to the traditional method.
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.030
· Download
F. Tegtmeier, C. Weißmüller, E. Krämer
This paper describes two ISO 7500-1 round robin tests in Germany, which were undertaken as a tool to meet the requirement of ISO/IEC 17025:2017 for interlaboratory comparisons. Up to 40 accredited laboratories calibrated the force measuring devices of different material testing machines at the IfEP, the Institute for Proficiency Tests. The method, uncertainty calculation and results of the round robin tests are described here.
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.027
· Download
C. L. Giusca, S. Goel, I. Llavori, R. Kumme, O. Baer, A. Prato, A. Germak
Industry 4.0 (I4.0) revolution provides new avalanche of opportunities in the arena of manufacturing and metrology. To take advantage of this opportunity, EMRP 18SIB08 ComTraForce project began the development of digital constructs necessary for a Digital Twin of a load cell that allows, in real time, to predict, optimise and maintain desired functionality throughout the device lifetime. Specifically, its project team has been working on developing digital constructs based on experimentally validated finite element models in conjunction with analytical models. The work provides new avenues...
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.026
· Download
L. F. Wang, K. Ma, P. Liu, D. B. Shen, S. Zhang, N. Song, Y. Zhang
Based on the characteristics of automatic intelligent measurement device and the demand of class E group weights value transmission, this paper proposes two measurement design methods for combined verification of class E group weight, establishes the mathematical model and analyses the uncertainty. The two combination methods are compared with the direct comparison method given by “OIML R111-1:2004”. The analysis verifies that the two component combination algorithms suitable for intelligent measurement device are effective and feasible, which is helpful to promote the application of...
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.024
· Download
L. F. Wang, K. Ma, D. B. Shen, Y. Zhang, S. Zhang, P. Liu, N. Song
This paper describes a set of intelligent measurement system for large mass. The system realises the intelligent operation of the process of (100 kg ~ 1 000 kg) weights calibration, including loading and unloading reference weights, loading and unloading test weights, calculating data, and providing calibration records. These intelligent operations are realised by the design of the equal arm electromagnetic balance, loading and unloading weights, transmission mechanism, and the central intelligent control software. The system improves the accuracy and work efficiency of large weights...
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.023
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A. J. Knott, R. S. Oliveira
This paper compares static and continuous performance characteristics of a force transducer, determining the effect of force application rate, force application principle, and filter settings on the observed differences. It also develops a methodology for identifying and correcting possible non synchronisation between instrument channels.
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.020
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M. J. A. Solis, C. Giusca, S. Goel
Like any other measuring device, load cells are vital in ensuring that products meet quality and safety requirements; therefore, they must always be accurate and reliable. Creep affects measurement results and the useful life of load cells but is not well understood. Digital twins create a virtual representation of an instrument that can be used to understand, monitor, and predict load cell behaviour. This study found that the significant source of creep originates from the strain gauge's carrier matrix and that the Larson-Miller Parameter equation can be used to support the digital twin...
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.017
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Z. Zelenka, S. Alisic, A. Malengo
Subdivision is a crucial technique in mass metrology because it allows the determination of the mass of weights of various nominal values and the realisation of the mass scale. This technique is usually based on complicated mathematics. The current models are generally sufficient for many practical aims but far from the best performance. Project 19RPT02, “Improvement of the realisation of the mass scale” (EMPIR Call 2019 –Research Potential), has been, among others, investigating an improved model for the calculations.
TC3 Conference 2022
· TC3
· 2022
· 10.21014/tc3-2022.016
· Download