THE EVALUATION OF WESTON CELL RELIABILITY ON THE BASIS OF THE ELECTROMOTIVE FORCE DRIFT

Florin Nenciu, Irina-Elena Ciobotaru, Dănuţ-Ionel Văireanu
2013 Bull., Series B   unpublished
The Weston cell, invented by Edward Weston in 1893, is a wet-chemical cell that produces a highly stable voltage suitable as a laboratory standard for calibration of voltmeters and for the determination of the electromotive force. The use of Weston cell after a long-time period as a calibration tool has to be considered carefully taking into account the possibility of certain modification in time of its characteristic parameters. This paper attempts to evaluate the reliability of a 55 year old
more » ... y of a 55 year old Weston cell in terms of its actual electromotive force, its voltage drift as well as the internal resistance.
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