Interlaboratory comparisons of the calibration results of signal generator
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 3, Issue 9
Abstract
<p>The data of interlaboratory comparisons of calibration results of signal generators at three calibration points are presented. The choice of methodology for processing the results of interlaboratory comparisons is made taking into account the long-term drift of the comparison sample. The modernization and research of the comparison sample for interlaboratory comparisons of calibration results of signal generators are carried out. The assigned values for the three calibration points and their extended uncertainties are determined. Expressions are obtained for the approximation of the long-term drift of the comparison sample and uncertainty budgets for all assigned values of the comparison sample at the frequencies of 130 MHz, 168 MHz and 223 MHz are compiled.</p><p>The interlaboratory deviations of the results obtained by laboratories are determined and the consistency of the data obtained using the E<sub>n</sub> and z indicators is estimated. This characterizes the reliability and accuracy of laboratory measurement results, and is also important for confirming technical competence. The presented results of interlaboratory comparisons of the signal generator calibration results show that all participating laboratories meet the requirements by the E<sub>n</sub> indicator. At the same time, two out of ten laboratories require certain substantial corrective measures, as they do not meet the requirements by the z indicator.</p><p>It is established that the E<sub>n</sub> indicator is not always self-sufficient. It largely characterizes only the reliability of laboratory measurement results. For this purpose, the z indicator is more informative, which provides more information on the accuracy of laboratory measurement, that is, the proximity of measurement results to the true value.</p>
Authors and Affiliations
Oleh Velychko, Sergii Shevkun, Tetyana Gordiyenko
Experimental investigation of the fireextinguishing system with a gasdetonation charge for fluid acceleration
<p>To improve the parameters of pulsed fire-extinguishing plants for long-range and mass and dimensional indicators, it was proposed to replace the pneumatic propellant charge with the gas-detonation charge. The charge i...
Computer modeling of water cleaning in wetland taking into account of suffosion ang colmatation
<p>The mathematical model of filtering with regard to colmatation and suffusion in the system bioplato-filter 2. This saturated porous medium is considered in terms of a complex heterogeneous system "fill"-"concentration...
Development of a method for structural optimization of a neural network based on the criterion of resource utilization efficiency
<p>At present, mathematical models in the form of artificial neural networks (ANNs) are widely used to solve problems on approximation. Application of this technology involves a two-stage approach that implies determinin...
Determining the microelement composition of poppy seeds using solidphase spectrophotometry method
<p>Poppy seeds are one of the most important and oldest oil-bearing crops in the world. Therefore, quality control of poppy seeds and food products whose composition contains them as a food additive, is very important. T...
Development of a technological approach to the control of turbine casings resource for supercritical steam parameters
<p>A comprehensive model for evaluation of the resource of HPC of the turbine K-800-240-2, which includes calculation of thermal, stressed-strained state, cyclic and static damageability, is presented here. The numerical...