Insert a soft bottle brush dipped in a mild liquid detergent or a specialized oil solvent.
Direct the outlet/waste sample line straight to the bilge or a drain tank with minimum backpressure.
Inside the measuring cell, an optical sensor passes light through the liquid sample. Oil droplets scatter the light at specific angles, which are recorded by photo-detectors. Advanced micro-processors calculate the oil concentration based on the intensity of this scattered light.
This comprehensive manual guide covers the technical specifications, installation steps, operation, and troubleshooting protocols for the Deckma Hamburg OMD-11 Bilge Alarm. Technical Specifications and System Overview
For vessels integrating the OMD-11 into a remote alarm system or engine room display, the manual’s Modbus map is gold. It lists registers for:
The sample cell should be regularly cleaned using fresh water to prevent fouling from oil residues.
: Standardly set to 15 ppm, though options for 10 ppm or 5 ppm can be adjusted via front panel buttons.
Understanding its operational framework, calibration procedures, and routine maintenance is critical for preventing environmental pollution and ensuring regulatory compliance. 1. Technical Specifications and Overview
24V AC/DC, 115V AC, or 230V AC (model variant dependent).
| Parameter | Specification | | :--- | :--- | | | Light Scattering (Infrared/Near-IR) | | Measuring Range | 0 – 100 ppm (parts per million) | | Resolution | 0.1 ppm | | Accuracy | ±10 ppm (0-100 ppm range) | | Sample Flow Rate | 3 – 4 Liters per minute (typical) | | Ambient Temperature | -25°C to +55°C | | Sample Water Temp | +10°C to +65°C | | Power Supply | 100-240 VAC, 50/60 Hz | | Alarm Set Points | 15 ppm (Standard Bilge), 100 ppm (Alarm) | | Outputs | 4-20 mA analog output; Relay contacts for alarms | | Protection Rating | IP56 / IP65 (Control Unit) |
Operating the OMD-11 requires following structured startup and shutdown checklists to maximize system longevity. Pre-Operation Checks
0–20 mA or 4–20 mA analog output for external recording.
The monitor must be located as close to the oily water separator as possible.
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is a vital piece of marine safety and environmental equipment engineered by Deckma Hamburg GmbH . Designed specifically for use with 15 ppm (parts per million) Oily Water Separator (OWS) units, the OMD-11 ensures compliance with strict international maritime pollution regulations. It measures the concentration of oil in bilge water discharge, preventing accidental pollution by triggering alarms and stopping overboard discharge if legal limits are exceeded.
| Component | Function | Common Manual Warning | | :--- | :--- | :--- | | Central Unit | Data processing & UI | Do not open while powered. | | Measuring Head | Optical detection | Clean lens annually. | | Blower Motor | Air aspiration | Check carbon brushes (if type M-4) every 10k hours. |
