Remote signal conditioner for a Coriolis flowmeter
US6487507B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Meter electronics for a Coriolis flowmeter capable of being intrinsically safe. A signal conditioner receives power from a power supply in a host system remote from the signal conditioner. Drive circuitry in the signal conditioner generates a drive signal and applies the drive signal to a driver affixed to at least one conduit of the Coriolis flowmeter. Pick-off signal conditioning circuitry in the signal conditioner receives input signals from a first pick-off sensor and a second pick-off sensor affixed to the at least one conduit of the Coriolis flowmeter, generates information indicating properties of a material flowing through the conduit from the input signals, and transmits output signals containing the information to the host system. Host-side protection circuitry in the signal conditioner prevents power in excess of an intrinsically safe threshold from being applied to wires connecting the signal conditioner to the host system and flowmeter assembly protection circuitry in said signal conditioner prevents power in excess of the intrinsically safe threshold from being applied to wires connecting the signal conditioner to the driver, the first pick-off sensor, and the second …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.