Method for in-situ calibration of an analog measurement transmission path and corresponding apparatus
US10989574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2016 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Nov 25, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K15/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for in-situ calibration of an analog measurement transmission path coupled with the determining and/or monitoring of a process variable of a medium is disclosed, wherein analog electrical signals are transmitted via the measurement transmission path from a control/evaluation unit to a control unit, wherein the control/evaluation unit is associated with a sensor, which determines and/or monitors the process variable based on at least one component sensitive for the process variable. The sensor is operated either in a measuring mode or in a simulation mode, wherein, in the simulation mode, the control/evaluation unit outputs for a set time span an analog electrical signal, which is unequivocally recognizable as simulated and is recognized and registered by control unit, and the calibrating of the measurement transmission path is performed, in that the control unit determines the deviation between the analog electrical signal and the registered analog electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.