51 research outputs found
High perfomance selectable value transportable high dc Voltage standard
At National Institute of Metrological Research (INRIM), a selectable-value
Transportable High dcVoltage Standard (THVS) operating in the range from 10 V
to 100 V in steps of 10 V, was developed. This Standard was built to cover the
lack of high level dc Voltage Standards at voltages higher than 10 V to employ
as laboratory (local) or travelling Standards for Inter-Laboratory Comparisons
(ILCs). A ground-mobile electronic technique was used to enhance the accuracy
of the THVS at the higher values. The THVS shows better noise, better
short-mid-term stability than top level dc Voltage and multifunction
calibrators (MFCs) and better suitability and insensibility to be transported
than these instruments. The project is extensible to 1000 V
High accuracy transportable selectable-Value High Dc Voltage Standard
À l'Institut national de recherche metrologique (INRIM) il a été développé un étalon de haute tension continue avec des valeurs
sélectionnables de 10 V à 100 V pour compenser le manque d'étalons de haut niveau de tension continue d'une valeur supérieure à 10 V pour
les comparaisons interlaboratoires de haut niveau. Il a été utilisé une nouvelle technique électronique de terre mobile. L'étalon développé a un
bruit inférieur et il a la stabilité égal à celle des calibrateurs de tension continue ou multifonction de haut niveau largement utilisé dans les
laboratoires d'étalonnage électriques; il a aussi une meilleure attitude à être transporté pour les comparaisons interlaboratoires. Le projet est
extensible jusqu'à 1000 V
Comparison of a Planar Thin-Film Thermal AC Voltage Standard up to 1 MHz
partially_open4sìThis paper presents results of a trilateral comparison with a traveling ac voltage standard comprising a planar thin-film thermal converter. The ac–dc voltage transfer difference of the standard was measured at 1 V and at selected frequencies from 20 Hz to 1 MHz against primary thermal ac voltage standards at the Silesian University of Technology, Istituto Nazionale di Ricerca Metrologica, and Trescal.openM. Kampik, M. Grzenik, T. Lippert, B. TrincheraKampik, M.; Grzenik, M.; Lippert, T.; Trinchera, B
High level measurement comparison on a high performance multifunction calibrator between THE INRIM-Lab for multifunction instruments calibration and an Accredited Electrical Calibration Laboratory
Cet article présente une comparaison de mesures entre le laboratoire pour l'étalonnage des instruments électriques multifoncti
ons de
l’Institut national de métrologie de recherche (INRIM) et un laboratoire d'étalonnage électrique de haut niveau. L'instrument à
étalonner utilisé
est un calibrateur multifonction de haute performance qui a été choisi pour l'amplitude de ses champs de mesure et son meilleur
définissabilité
(incertitude intrinsèque) que celle d'un multimètre numérique. L'analyse des résultats a été effectuée en évaluant le degré de
corrélation entre
les mesures des deux laboratoires. L'erreur-type était inférieur à 1 pour tous les points de mesure
Automatic DC voltage precision resistive divider with ratios between 10:1 and 107:1
At INRIM a DC Voltage precision resistive divider performing decade ratios from 10:1 to 107:1 was built. It can be
automatically calibrated with a top-class calibrator and a precision multimeter calibrated in terms of deviation
from linearity. It is made up of 90 kΩ, 9 kΩ, 900 Ω, 90 Ω, 9 Ω, 0.9 Ω, 90 mΩ and 10 mΩ bulk metal foil resistors
connected in series, in four-terminal configuration. Peculiarities of the calibration method of the divider are: the
evaluation of the DMM input impedance to correct its readings minimizing the load error and a solution to
reduce the emfs effect of the relays. These operations are made during the calibration of the divider. The calibration
and use uncertainties of the divider span respectively from 6.1 × 10 7 to 5.9 × 10 4 and from 6.7 × 10 7
to 6.5 × 10 4. The project is transferable to secondary laboratories in the framework of the INRIM knowledge
transfer task
Comparison of a Thermal AC Voltage Standard in the 1–30-MHz Frequency Range
This article presents results of a comparison of a traveling ac voltage standard, which was a fused-silica planar multijunction thin-film thermal converter (PMJTC) developed at the National Institute of Standards and Technology (NIST). The ac-dc voltage-transfer difference of the standard was measured at 2 V and selected frequencies from 1-30 MHz against primary thermal ac voltage standards at the Silesian University of Technology, Istituto Nazionale di Ricerca Metrologica, RISE Research Institutes of Sweden, and Trescal A/S Silkeborg
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