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DET-1600 Detonation Sensing Monitor

DET-1600 Detonation Sensing Monitor Helps Avoid Engine Damage

This 24VDC-powered, 32-bit microprocessor-based electronic instrument is designed for use on natural gas-fueled engines to detect detonation and misfire and avoid consequential engine damage. Industry-standard, low-cost, piezoelectric vibration sensors are mounted directly on the engine and are used to transform the vibrations caused by combustion into electrical signals which are then evaluated by the DET-1600. These values – generated for every cylinder on a cycle-by-cycle basis – are then measured against misfire and detonation setpoints configured by the user for the monitored engine. The monitor accepts up to 16 detonation sensors that are wired to pluggable Phoenix-type connectors; the recommended configuration is one sensor per cylinder.

The DET system can be configured to take a number of control actions to protect the monitored engine upon indication of detonation (or misfire). In many applications, the DET will utilize one of two solid-state output switches to activate an external unloader to reduce engine load. Should that remedial action be unsuccessful addressing the detonation issue, the DET can be configured (when used in conjunction with a digital ignition system) to automatically retard the ignition timing. In the event that an ignition timing adjustment also proves to be ineffective in eliminating engine detonation, the second output switch – typically tied to a digital annunciator or other monitoring device – acts as a final safety measure to shut down the engine.

The DET system is housed in a rugged, powder-coated, aluminum enclosure and features an integral 2x16 backlit LCD to display the detonation and misfire reference level numbers, engine cylinder labels, control and output switch status, the cause of shutdown log, and all diagnostic messages. System configuration is accomplished using an on-board RS485 serial port and a powerful, yet easy to use, system configuration and monitoring program.

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Last modified: 04/07/11