DocumentCode :
2280684
Title :
Development of an automated AC-DC transfer measurement system for voltage and current at low frequencies
Author :
Govil, A.K. ; Ahmad, Saood ; Pal, Bijendra ; Kothari, P.C.
Author_Institution :
Nat. Phys. Lab., New Delhi
fYear :
2008
fDate :
8-13 June 2008
Firstpage :
590
Lastpage :
591
Abstract :
National Physical Laboratory India (NPLI) is the premier research & development center and the National Metrology Institute, which provides traceability in measurements by calibration throughout the country. Low Frequency voltage and current are very important quantities in electrical metrology. The standards for LF voltage and current are established by assigning AC-DC transfer difference to Thermal Converters (TCs) worldwide. The range of frequencies of these standards is from 10 Hz to 1 MHz for the voltage level of 1 V to 1000 V. This paper presents the automation of method of assigning AC-DC transfer difference to thermal converter (from 10 Hz to 1 MHz) makes measurements faster and more accurate through IEEE-488 interface card and cables. The software for this process has been developed using the VEE Pro application, which is a graphical programming environment optimized for use with the electronic instruments. It also minimizes the human involvement and therefore reduces the chances of errors. Using this software, the measurements have been carried on the 6 V TC with respect to 4 V TC at 4 V level in the frequency range from 10 Hz to 1 MHz. The result shows that the automation has been done successfully.
Keywords :
automation; calibration; computer graphics; computerised instrumentation; convertors; electric current measurement; transfer standards; voltage measurement; IEEE-488 interface card; NPLI; National Metrology Institute; National Physical Laboratory India; VEE Pro application; automated AC-DC transfer measurement system; calibration; current measurement; electrical metrology; electronic instruments; frequency 10 Hz to 1 MHz; graphical programming environment; measurement standards; thermal converter; voltage 1 V to 1000 V; voltage measurement; Analog-digital conversion; Automation; Calibration; Current measurement; Frequency conversion; Frequency measurement; Laboratories; Low voltage; Metrology; Voltage measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
Type :
conf
DOI :
10.1109/CPEM.2008.4574917
Filename :
4574917
Link To Document :
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