Chemical controller system and method
US10990115B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2019 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Mar 28, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/07
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A chemical controller for an aquatic application comprising an output relay. The chemical controller further includes a current detection circuit configured to detect current on an output of the output relay and a current fault detection device configured to output a current fault signal when a current fault condition has occurred. A relay latch of the chemical controller receives the relay enable signal and the current fault signal and decouples the relay enable signal from a corresponding output when a current fault condition has occurred. A relay drive circuit receives a signal from the corresponding output to responsively activate and deactivate the output relay. A watchdog timer circuit causes the output relay to be deactivated in response to detecting a hung processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.