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- 2018
- spectral irradiance
- correlated color temperature
- double monochromator
- color rendering index
- Uncertainty of measurement
- Measurement and Control Technology and Instruments
- Brno University of Technology
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Bilateral Comparison LF Power Up to 100 kHz
摘要： Nowadays there is more need for traceability for distorted power waveforms. Therefore a power calibration system was developed at the European Standards Laboratory of Yokogawa Europe Solutions B.V. This system has the capability to calibrate electrical power meters from DC, 10 Hz up to 100 kHz. To evaluate the calibration system traceability, a bilateral comparison was carried out between the Yokogawa European Standards Laboratory and the National Standards Institute of Sweden (RISE).
关键词： Power system harmonics,Calibration,Uncertainty,Measurement,Power measurement
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - VNIIM 10 V Programmable Josephson Voltage Standard
摘要： A 10 V programmable Josephson voltage standard (PJVS) was developed at VNIIM on the basis of a Supracon 10 V chip. The current margins for the ?rst Josephson step are close to 1 mA. This programmable system was directly compared with a conventional dc Josephson voltage standard (JVS) based on 10 V PTB chip in the range from 1 mV to 10 V.
关键词： comparison,measurement uncertainty,Josephson voltage standard,measurement techniques,Precision measurements
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Uncertainty of Phasor Measurement Unit Calculated by Means of Monte Carlo Method
摘要： Whole measurement chain of a Phasor Measurement Unit was simulated and uncertainty of Total Vector Error (TVE) has been calculated using Monte Carlo Method. The results showed the most important uncertainty contributions and behaviour of the probability distribution function of the output uncertainty. Asymmetrical uncertainties of TVE have to be calculated to obtain proper values.
关键词： simulation,total vector error,measurement uncertainty,phasor measurement unit,monte carlo
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Traceability to UTC Using the SIM Time Network Bilateral Comparisons
摘要： This paper describes how the Time and Frequency Laboratory of CENAMEP is preparing its process to use the SIM Time Network Bilateral Comparison as backup link to demonstrate the traceability to UTC for his calibration and dissemination services following the CCTF-WGMRA Guideline 9: CCTF criteria for obtaining traceability in Time and Frequency, and the procedures and uncertainty estimation explained in this document can be used as example for other Time and Frequency laboratories in SIM region that have similar characteristics as CENAMEP AIP, and are seeking to demonstrate traceability using the SIM Time Network.
关键词： traceability,Clock comparison,uncertainty
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Evaluation Standard Uncertainty Depends on Travelling Standard Instability During Key Comparison
摘要： This paper deals with some problems concerning the evaluation of standard uncertainty depends on travelling standard instability and its further influence on evaluation uncertainty of key comparison reference value during a key comparison of national standards. The authors have proposed an explicit practical approach for evaluating standard uncertainty depends on travelling standard instability when the radial scheme of comparisons is used. As an example, the approach is applied to key comparison COOMET.EM–K5.
关键词： key comparison,travelling standard,uncertainty,Electric power,instability
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Absolute Terahertz Power Measurement of Tens of Nanowatts Using a Highly-Sensitive Calorimeter at Room Temperature
摘要： This study demonstrates a quantitative measurement of absolute terahertz power of tens of nanowatts at room temperature. A highly sensitive calorimetric measurement system is constructed using an extremely low noise amplifier and multilayer thermal insulation jackets. A vacuum insulator is used to mitigate thermal disturbance; therefore, very stable measurements are realized at room temperature. As a result, the absolute power of 26.7 nW is measured at 1 THz with the relative expanded uncertainty of 4.2% (k = 2).
关键词： Terahertz,traceability,calorimeter,uncertainty,absolute power
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - A High Precision Multi-Ratio Three-Stage Current Transformer (CT) for Loss Measurements of Extra High Voltage (EHV) Three-Phase Shunt Reactors with Test Voltages up to 1100 kV
摘要： An overview of the development and performance of special high precision multi-ratio three-stage CT and its application for loss measurement of EHV three-phase shunt reactors with AC test voltages up to 1100 kV at Royal SMIT Transformers are presented and discuss. It features current ratios of 500A/1A, 400A/1A, 300A/1A, 200A/1A, and 100A/1A with ratio errors within 3×10-6 in both magnitude and phase with burdens up to 1.0 ? and at power frequencies of 50 Hz - 60 Hz.
关键词： multi-ratio,ratio errors,multistage,Extra High Voltage (EHV),loss measurements,uncertainty,shunt reactor,three-stage,precision measurements
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Generating Electric Fields for Air Sensitivity Measurement of Specific Absorption Rate Probe
摘要： To measure the air sensitivity of a specific absorption rate (SAR) probe, an electric field (E-field) generation system is implemented using field-generating cells, a transverse electromagnetic (TEM) cell below 1 GHz and waveguides in 1.12–2.6 GHz-frequency range. The output side of the field-generating cells is terminated with an attenuator and a power sensor to determine the E-field strength which is traceable to power and attenuation standards. Measured results with the estimated uncertainty are presented at 835 MHz and 1800 MHz.
关键词： waveguide,uncertainty,Electric field,specific absorption rate,measurement standards,TEM cell
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Mixed Uncertainty Propagation Method in S-Parameter Measurements
摘要： A new approach to uncertainty evaluation in scattering parameters measurements which is based on the well-established method of ripple and a subsequent uncertainty propagation through calibration algorithms is proposed. The procedure gives a practical alternative to guarantee traceability to Type-N and 3.5 mm connectors in OSM, SOLT and SOLR calibrations. Its implementation is described and tested.
关键词： calibration,traceability,vector network analyzer,measurement uncertainty,scattering parameters
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Qualifying a Transient Recorder for Traceable Measurements of Very Fast Transients
摘要： This paper presents the qualification of a transient recorder used in a system for traceable measurements of Very Fast Transients. The system is designed for traceable measurements of VFT up to 100 kV, having a target settling time <10 ns, a peak voltage error <1%, and a front time error <5%. The rise time of the digitizer is 1.6 ns at 50Ω and 1.2 ns at 1 MΩ. Step responses show settling times of 4.5 ns. A convolution method gives a peak voltage error of 0.12% and a front time error of 4.1% for 4.5ns front times.
关键词： traceability,high voltage,measurement uncertainty,Fast transients
更新于2025-09-10 09:29:36