High precision voltage ratio measurements using digital voltmeters and resistive voltage divider

Author(s):  
R. Malaric ◽  
I. Lenicek ◽  
K. Malaric
2013 ◽  
Vol 8 (10) ◽  
pp. P10026-P10026 ◽  
Author(s):  
S Bauer ◽  
R Berendes ◽  
F Hochschulz ◽  
H -W Ortjohann ◽  
S Rosendahl ◽  
...  

Author(s):  
Bjørnar Karlsen ◽  
Kåre Lind ◽  
Helge Malmbekk ◽  
Per Ohlckers

A high-precision voltage buffer and a 10:1 resistive voltage divider have been constructed for use in ac voltage and electrical power metrology. Long-term stability of the buffer's dc response has been demonstrated by two dc sweeps performed 20 days apart, with best-fit linearized gain varying less than 1 μV/V. The absolute ac gain has been measured using a high-precision digital multimeter for 10 Hz and 1 kHz with results consistent with dc within 5 μV/V. This value agrees with the characterization of ac–dc difference using thermal converters from different producers with a variety of resistance for various voltages from 1 V to 5 V. The ac–dc difference was further characterized better than 40 μV/V for the same voltages up to 100 kHz and better than 100 μV/V for 3 V at 1 MHz. Absolute ac gain and ac–dc difference has also been measured for the voltage divider and buffer combination from 10 V to 50 V, with similar agreement up to 1 kHz. The ac–dc difference from 10 Hz to 100 kHz of this combination shows an agreement well within 30 μV/V in this entire voltage span with a total response not exceeding 125 μV/V. This make the voltage divider and buffer combination suitable for sampling electrical powers for a wide range of voltages.


1985 ◽  
Vol 47 (11) ◽  
pp. 1222-1223 ◽  
Author(s):  
J. Niemeyer ◽  
L. Grimm ◽  
W. Meier ◽  
J. H. Hinken ◽  
E. Vollmer

2014 ◽  
Vol 530-531 ◽  
pp. 1126-1129
Author(s):  
Yi Fei Wang ◽  
You Xin Yuan ◽  
Liang Yuan ◽  
Ping Kuang ◽  
Jing Chen

A novel integration method with stabilizing voltage and frequency, UPS, intelligent charging for mobile power supply has been proposed in this paper. Process of the advanced method can be divided into four steps, including the generating electricity, outputting stabilizing voltage and frequency, UPS, intelligent charging. The following works have been done in the study: the principle of the integration method, the topological structure of integration system, the Implementation of the integration method. According to the principle of the integrated method, the integrated system can be developed. The system can be realized functions, such as the generating electricity, outputting stabilizing voltage and frequency, UPS, intelligent charging and so on. By the system, the high precision voltage amplitude and frequency is supply to outdoor load, and the UPS state is maintained.


1971 ◽  
Vol 7 (23) ◽  
pp. 679 ◽  
Author(s):  
B.L. Hart

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