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This paper deals with method for evaluation of quality of the impulse high voltage measuring system. The purpose of assessing the quality of the impulse high voltage measurement system is to determine whether the measurement system is suitable for use in the appropriate measurements. Firstly, paper describes components of impulse high voltage measuring system. Main characteristics of measuring systems...
This paper presents a novel wideband quadrature hybrid with tunable power dividing ratio. It consists of a broadband hybrid power divider and two varactor diodes. By verifying the reverse voltage of the varactor diodes, the power dividing ratios between the two output ports (i.e., port 3 and port 4) of the hybrid can be easily controlled. Analytical design equations are derived using the even-odd...
The paper describes frequency dependence correction of the Agilent 3458A DMM in DCV sampling mode. The biggest error source identified is the input filter roll-off, which was measured and evaluated with an asynchronous sampling technique using phase sensitive sine fit algorithm. Corrected response is flat within 50 µV/V in the whole audio frequency band.
According to Finnish legislation, at least 80 % of the energy meters have to be remotely readable and provide hourly based energy data by the end of 2013. In April 2011 Tampere University of Technology (TUT) in co-operation with Finnish Energy Industry conducted a questionnaire to Finnish distribution network operators (DNOs) to map the installation status of the remotely readable meters, the communication...
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