: Two independent circuits, factory-set at 15 ppm (adjustable from 2–15 ppm). Power Supply

Fix : Check continuity across the relay terminals during a test alarm.

In the high-stakes environment of a marine engine room, few pieces of safety equipment are as critical as the oil mist detector. For decades, the Deckma OMD-11 has been the gold standard for crankcase explosion prevention on large two-stroke and four-stroke diesel engines. However, owning this sophisticated optical-electronic device is only half the battle; mastering the is what separates a safe engine room from a potential disaster.

The OMD-11 Bilge Alarm is designed to continuously monitor the oil content in the discharge water of a ship’s bilge separator. It ensures compliance with by measuring the oil concentration and triggering an alarm if it exceeds the legal limit of 15 ppm (parts per million). Key Technical Specifications

The tapping should be on a vertical section of the discharge line to prevent air bubbles from interfering with the optical sensor. Operation & Calibration

of the oily water separator. Distances beyond this may exceed the 20-second response time mandated by IMO regulations.

The Deckma OMD11 manual is essential for ensuring the proper installation, operation, and maintenance of the system. By following the guidelines and instructions provided in the manual, shipowners and operators can:

Deckma Hamburg OMD-11 is an older oil-in-water monitoring unit designed for use with 15 ppm oily water separator systems. While no longer in active production, it remains fully supported for maintenance and calibration. Shivtech Marine Control Systems & Services Official Manuals & Resources Complete Instruction Manual (Scribd): A detailed OMD-11 Instruction Manual

provides details on the 15 ppm alarm settings and IMO resolution compliance. Technical Datasheet: A technical overview and parts list can be found at Mackay Marine Key Technical Specifications Measurement Range 0 – 30 ppm (Trend indication up to 50 ppm) Meets IMO Resolution MEPC.60 (33) requirements Alarm Points

Rinse thoroughly with clean water, reassemble, and check for leaks. Managing Internal Humidity

When the OMD-11 experiences an operational issue, the "System Fault" LED illuminates, and the alarm relays trip safely into an alarm state. Common Fault Scenarios Issue / Error Symptom Potential Cause Corrective Action Heavily fouled glass tube or trapped air bubbles.

I can provide specific troubleshooting steps or specific document references. Share public link