P. D. McDowall
We report on our initial investigations into directly measuring the temperature gradient across a DHi piston-cylinder unit. A PRT in contact with the top of the piston was compared to measurements taken in the mounting post that houses the cylinder. The temperature difference between the two PRT’s was used to estimate the temperature gradient across the piston-cylinder unit. Effects of rotating the piston and operating under vacuum, and their impact on the piston-cylinder temperature, were investigated. The results can be used to inform the uncertainty budget for temperature inhomogeneity in...
TC16 Conference 2023
· TC16
· 2023
· 10.21014/tc16-2023.01
· Download
Najji H. AlYami, Abdullah S. AlOwaysi, Khaled M. Ahmed
The necessity for national and international programs to monitor the levels of carbon dioxide emissions in the atmosphere has arisen as a result of the recent large greenhouse gas emissions that cause a rise in the Earth's temperature and climate changes with severe impacts. In order to give confidence in the monitoring results and enable the proper decisions to be made regarding the supply of environmental treatment and air quality through the limiting and monitoring of emission, it is required to maintain the traceability of the measurement data to SI units. Gas measurements laboratory at...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2023
· 10.21014/tc24-2023.06
· Download
O. Melnykov, S. Kulyk, F. Durbiano, F. Rolle, M. Sega, A. Petrenko
This document explains advantages and disadvantages of the measurement methods for the moisture content determination of plant-based materials in order to identify the best one which can provide metrological traceability to SI units. The term “moisture” is generic and, to have proper Calibration and Measurement Capabilities (CMCs) and Certified Reference Materials (CRMs), a better specification of the measurand should be given. Currently, no CMCs for moisture content measurement in the plant-origin bulk materials, as well as respective CRMs, are available in the KCDB. Undoubtedly, those CMCs...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2023
· 10.21014/tc24-2023.05
· Download
Florbela A. Dias, Cristina Palma, Carlos J. Costa
The Reference Gas Laboratory (LGR) of IPQ is participating in the project MetCCUS - Metrology for Carbon Capture Utilization and Storage under the new EPM (European Partnership on Metrology) Program. The goal of this project is to develop a metrological infrastructure that enables monitoring and detection of carbon dioxide leaks in energy and industrial processes, in transport networks and also allow the support of a better understanding of the life cycle of carbon dioxide. The contribution of LGR involves the preparation of certified reference materials (CRM) to allow the metrological...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2023
· 10.21014/tc24-2023.04
· Download
F. Durbiano, S. Pavarelli, F. Rolle, F. R. Pennecchi, M. Sega
Due to the involvement of carbon dioxide (CO2) in the global warming effects, INRiM is developing certified reference materials (CRMs) of CO2 in synthetic air. The mixtures are prepared by gravimetry, a primary method, and verified by Non- Dispersive Infrared spectroscopy. The CO2 amount fraction in the mixtures and its associated uncertainty are the certified properties of the CRMs. A corresponding stability study of the amount fraction of CO2 is also ongoing. Further work foresees the development of CRMs for the isotopic composition of CO2 in air, after the participation in specific...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2023
· 10.21014/tc24-2023.03
· Download
Valnei Smarçaro da Cunha, Romeu José Daroda, Júlio Dutra Brionizio, Marcos Paulo Vicentim, Fernanda Figueiredo Nunes, Graziele Mozzer Pereira, Thais Fagundes da Silva
The main use of bioethanol in the world is as a fuel by adding it to gasoline. The addition of ethanol has many purposes, such as increasing gasoline octane number, reducing carbon dioxide emissions by fossil fuels, energy security and environmental sustainability. The suitable bioethanol for mixing in gasoline is the anhydrous one, which must contain up to a maximum of 1% (w/w) of water, according to ASTM D5798-21 [1]. Although it is well known that ethanol is a hygroscopic substance, a complete study addressing the rates of moisture absorption by the ethanol and its evaporation, or showing...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2023
· 10.21014/tc24-2023.02
· Download
D. Zhu, S. Agarwal, B. Shu, R. Fernandes, Z. Qu
This work emphasizes on the development of an ultra-rapid spectrally resolved tunable diode laser absorption spectroscopy (TDLAS)-based spectrometer with a scan frequency of 40 kHz for dynamic NH3 quantification in a shock tube. Thanks to the high laser scan frequency, the NH3 mole fraction at various stages during the dynamic process can be quantified. Besides, considering lacking metrology in shock tubes for dynamic studies, we comprehensively evaluated the uncertainty sources and budgets of thermodynamic parameters and species concentration based on Guide to the expression of uncertainty...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2023
· 10.21014/tc24-2023.01
· Download
C. Daniel, A. R. Dablio, R. Damian, M. Lagmay, J. A. Valdueza, J. E. Guerrero, M. A. Principe
Chloride is a corrosive anion that can attack steel and other metal embedded materials in concrete structures leading to its degradation. Chloride in concrete may come from the materials used for making concrete such as cement. Hence, it is important to have a reliable method for determining chloride in cement, in this case the water-soluble chloride which is representative of chloride that may pose corrosion risk. In this study, ASTM C1218/C1218M-20 was used as a guide for sample extraction and the water-soluble chloride was later quantified by ion chromatography. Validation of this method...
IMEKO TC8, TC11 and TC24 Conference
· TC11
· 2023
· 10.21014/tc11-2023.07
· Download
M. Cundeva-Blajer, M. Nakova, V. Sapundziovski, K. Demerdziev
The metrology infrastructure for electrical quantities in Southeast Europe is underdeveloped as certain areas of electrical instruments’ calibrations are not well covered by the existing laboratories, even though there are economic and scientific needs. The paper shows the improvement of the calibration and measurement capabilities for extreme electrical impedance in the accredited Laboratory for Electrical Measurements at the Ss. Cyril and Methodius University in Skopje by deploying new calibration methods of instruments for extreme electrical resistance and inductance. The...
IMEKO TC8, TC11 and TC24 Conference
· TC11
· 2023
· 10.21014/tc11-2023.06
· Download
M. Cundeva-Blajer, Gj. Dimitrovski, K. Demerdziev
The paper presents a methodology for calibration of high-frequency instruments, such as oscilloscopes, counters and function generators operating above 1 MHz up to GHz level. The methods were developed at the Laboratory for Electrical Measurements at Ss. Cyril and Methodius University in Skopje, following the Calibration Guide EURAMET cg-7. The paper also discusses the challenges of setting up measurement traceability chain and uncertainty evaluation. These methods are important for the region of Southeast Europe, where the metrology facilities for calibration/testing of high frequency...
IMEKO TC8, TC11 and TC24 Conference
· TC11
· 2023
· 10.21014/tc11-2023.05
· Download