Title :
A frequency independent ROM-based digital meter for measurement of dissipation factor
Author :
Hota, P.K. ; Mahalik, N.G.P.C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. Coll. of Eng. Burla, India
Abstract :
The usual practice of measurement of dissipation factor (tanδ) uses a Schering bridge. To obtain an accurate result, for the true balance, stray capacitances are eliminated by using Wagner´s earthing device, which increases the cost. In recent years, the most used digital meter for measurement of dissipation factor uses a microprocessor. In addition to the microprocessor, ROM, RAM and several other interfacing chips are also then needed, adding to the cost and complexity of the meter. This paper describes a frequency independent ROM-based digital meter for measurement of dissipation factor which uses a digital phase-locked loop. The implementation scheme is discussed briefly. A simple computer algorithm for generating ROM codes has been highlighted. The cost of the meter is less than a meter which has the same accuracy and uses a microprocessor
Keywords :
automatic test equipment; automatic testing; dielectric loss measurement; electric breakdown; electrical engineering computing; insulation testing; microcomputer applications; read-only storage; ROM; ROM code generation; accuracy; computer algorithm; cost; digital meter; digital phase-locked loop; dissipation factor measurement; insulation tests; microprocessor; stray capacitances; tanδ; Bridges; Capacitance; Costs; Frequency measurement; Grounding; Microprocessors; Phase measurement; Read only memory; Read-write memory; Semiconductor device measurement;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.414104
