G. Buonanno, M. Dell'Isola, A. Frattolillo, L. Vanoli
Heat stress is a common problem throughout industry that depends also on some climatic parameters, such as the mean radiant temperature, air humidity, velocity and temperature. WBGT (wet bulb globe temperature) index is assumed in international standards as thermal stress index in job environments. It can be estimated directly, following the ISO 7243, by means of globe temperature, natural wet-bulb temperature and air temperature measurements or indirectly by means air temperature, humidity and velocity, and the radiative medium temperature. The aim of the present work is the experimental...
XVI IMEKO World Congress
· TC12
· 2000
· Download
M. Borovicka, A. Janac, P. H. Osanna
Developed new technology of heat procedure for preparation pure structure of platinum wire, which produce stable resistance coefficient, stable crystalline structure sturdy against contamination of inpurities. By this technology we produce Primary Standard Platinum Resistance thermometer what present high sable resistance thermometer with stability level ±2 to 3 × 10 -4 K what is stability level of water triple point cells 273.16 ± 2 to 3 × 10 -4 K, testing device in laboratory. This publication is based on work sponsored by the U.S.-Slovak Science and Technology Joint Fund in cooperation...
XVI IMEKO World Congress
· TC12
· 2000
· Download
J. Bojkovski, I. Pušnik, F. Bergelj
In the paper comparison of a non-pressure controlled caesium heat pipe with a fluidised bath containing alumina powder is presented. Both the heat pipe and the fluidised bath are used for calibration by comparison of contact thermometers (resistance thermometers, thermocouples, indication thermometers). Emphasis of comparison was on temperature stability, homogeneity of temperature (axial and radial gradients), usable depth, operating temperature range, maintainability, commercial availability, price and possibility of using a particular device for other purposes than calibration by...
XVI IMEKO World Congress
· TC12
· 2000
· Download
G. Begeš, I. Pušnik, J. Bojkovski
The article describes implementing of a personal computer and the LabVIEW program in measurement of temperature rising in a black corner in testing laboratories. A testing device can be considered as a complete measurement system, which can be regularly calibrated and thus providing traceable measurements. Besides the automation of the measuring process traceability is the most important category that must be considered in accredited laboratories. The whole project with its extension could change the Heating part of the standard or more likely cause an edition of a new standard describing...
XVI IMEKO World Congress
· TC12
· 2000
· Download
O. M. Velychko, O. A.-B. Akhmadov, Y. F. Pavlenko
Abstract. The modern conditions and development prospects of electrical and magnetic quantities units standards in Ukraine, their comparisons with standards of other countries are considered.
XVI IMEKO World Congress
· TC11
· 2000
· Download
J. C. Valente de Oliveira, J. A. Pires Alves
This work aims to demonstrate the metrological capability of the Dimensional Metrology Laboratory of the National Institute of Metrology, Standardization and Industrial Quality (INMETRO) in the calibration of internal and external diameter standards. Reference systems are used to measure roundness, diameters, straightness of generators, squareness between a reference surface and generators and parallelism between generators. The roundness deviation is measured with a special form measuring machine, achieving a very small measurement uncertainty. The other features are measured with a system...
XVI IMEKO World Congress
· TC11
· 2000
· Download
F. Steger, M. Schwaiger, C. Schmitzer
The Protocol of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) calls for Radionuclide Laboratories certified by the Technical Secretariat to support the international monitoring system (IMS) for verification of the Treaty. Therefore a Radionuclide Laboratory at the Austrian Research Centers Seibersdorf (RL3) was installed. To achieve the demanded minimum detection limit of 5 ìBq/m³ for Ba-140 (537 keV), the RL3 was constructed as a low level laboratory. The background of a high-purity Germanium detection system (HP-Ge) has been reduced by developing an active and passive detector...
XVI IMEKO World Congress
· TC11
· 2000
· Download
J. Sladek
The paper presents research on CMM virtual modelling applied for assessment of measurement accuracy and a method of CMM errors identification. The idea of the proposed method of error estimation is based on the measurement of a workpiece plate (hole or ball), placed in the CMM measuring area in such way, that reference points compose a spatial grid. The difference between co-ordinates of particular shape elements midpoints obtained from workpiece calibration and the coordinates given by the CMM creates the error grid. This grid is a basis for a matrix method of CMM error identification. The...
XVI IMEKO World Congress
· TC11
· 2000
· Download
W. Schwitz
Today’s and tomorrow’s globalised economy and societal demands ultimately require a globally recognised measurement system and an intensified regional collaboration in metrology. These are corner stones for the mutual recognition of standards and certificates and hence for the acceptance of each other’s capabilities, competence, traceability of measurements to the International System of Units and of the quantitative results themselves.
XVI IMEKO World Congress
· TC11
· 2000
· Download
A. Ryniewicz, M. Kowalski, J, Gawlik
The paper presents the system for temperature fields analysis of coordinate measuring machines. The system should allow the following operations: temperature measurements on the surface of selected CMM units and elements according to the adopted strategy, controlling the operations of the measurement systems, conducting the calibration and correction of measurement sensors, mathematical analysis with the finite element method and graphic presentation of results.
XVI IMEKO World Congress
· TC11
· 2000
· Download