Method and circuit arrangement for intermittent application of a voltage to an electrode
US5210496A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1990 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Oct 9, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a circuit arrangement for intermittent application of an electrical DC or AC voltage by a switch to an electrode in contact with a material, in particular for cleaning the electrode. The method is suitable in particular for use in electromagnetic flow measuring technology. The objective is to protect the electrode from parasitic capacitances present in the switch and interference voltages occurring therein. This is achieved in that at least in the period in which no voltage is applied to the electrode, the electrical potential of the electrode is coupled to the terminal of the switch which is not allocated to the electrode. Impedance converters are suitable as coupling elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.