Apparatus for automatically monitoring a constant current source in a measuring instrument
US4549623A · kind A · utility
5Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1984 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Aug 13, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G7/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic monitoring system for the constant current source in a balance having electromagnetic load compensation includes circuitry which generates a first current varying in dependence on the constant current and furnishes a digital signal indicative of the value of that current. A microcomputer is provided to compare the digital value to a reference value. If the comparison indicates that the constant current is outside of a given range of values, the microcomputer energizes the display to indicate the presence of an error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.