Dry well for temperature calibration system
US4079618A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1977 |
| Grant date | Mar 21, 1978 |
| Priority date | — |
| Expiry date | Feb 4, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for calibration of a temperature probe at temperatures both above and below ambient. A dry type heatsink for receiving the temperature probe, with a plurality of thermo-electric modules for selectively heating and cooling the heatsink to a preset temperature. A control circuit with a bridge arm for the desired or set temperature and a bridge arm for the actual or sensed temperature, providing inputs to a comparator for determining deviation from the set temperature and energizing the modules to change the temperature at the heatsink. A display unit for selectively displaying the actual temperature and the set temperature and for use in calibrating the system. A constant current source for the sensing arm of the bridge for improving the accuracy of the sensed temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.