Deckma Omd11 Manual 【TOP-RATED — 2024】

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 IMO Resolution MEPC.60(33) by measuring the oil concentration and triggering an alarm if it exceeds the legal limit of 15 ppm (parts per million). Key Technical Specifications

Measurement Range: 0 – 30 ppm (Trend indication up to 50 ppm). Accuracy: Compliant with IMO requirements.

Power Supply: 24V AC/DC, 115V AC, or 230V AC (depending on the specific model). Alarm Points: Factory set to 15 ppm. Output: 0(4) - 20 mA signal for external recording.

Protection Class: IP 65 (Dust-tight and protected against water jets). Operation and Functionality

The unit utilizes the Light Scattering Principle. A sample of the discharge water flows through a glass tube where it is exposed to an infrared light source.

Detection: Sensors measure the amount of light scattered by oil droplets in the water.

Display: The current oil concentration is shown on a digital display.

Alarm Relays: If the oil concentration exceeds 15 ppm, the unit activates a set of potential-free contacts. These are typically used to stop the overboard discharge and recirculate the water back to the bilge tank. Standard Maintenance Procedures deckma omd11 manual

To ensure accurate readings, the OMD-11 requires regular attention:

Cleaning the Measuring Tube: The most common maintenance task. The glass sample tube must be cleaned using a bottle brush and mild detergent to prevent "false high" readings caused by scaling or debris.

Zeroing the Unit: If the monitor shows a reading (e.g., 1 or 2 ppm) when known clean water is flowing through it, it may require a zero-point adjustment as outlined in the calibration section of the manual.

Desiccant Status: The unit contains a desiccant bag to prevent internal condensation. This should be checked and replaced if the color indicates it is saturated. Troubleshooting Common Faults

"Error" on Display: Usually indicates a hardware fault or a disconnected sensor. Check all internal cable connections.

Continuous High PPM: Often caused by a dirty measuring tube or air bubbles in the sample line. Ensure the sample flow is steady and the glass is clear.

Alarm Relay Not Triggering: Check the internal fuse and verify the wiring to the separator's solenoid valve. Manual & Documentation The OMD-11 Bilge Alarm is designed to continuously

Since the OMD-11 is a legacy model (often succeeded by the OMD-21 or OMD-24), it is critical to verify the Serial Number of your device when sourcing parts. You can typically find the full technical PDF through marine electronics suppliers or by contacting Deckma Hamburg directly.

Deckma OMD-11 is an older oil-in-water monitor designed for use with 15 ppm oily water separator systems. While it is no longer in production, it remains fully supported and compliant with IMO Resolution MEPC.60 (33) Technical Specifications 0–30 ppm, with trend indication up to 50 ppm. Meets IMO MEPC.60 (33) standards. Alarm Points:

Factory set at 15 ppm; adjustable between 2–15 ppm via front panel buttons. Output Signal: 0(4) – 20 mA (equal to 0–30 ppm). Power Supply: Standard 24V AC/DC; other voltages available upon request. Protection Rating: Dimensions: 175 x 190 x 220 mm (W x H x D). Mackay Communications, Inc. Key Manual Sections OMD-11 Instruction Manual covers the following critical areas: Installation:

Requires mounting on a rigid vertical surface, ideally at eye level.

Connects via 6 mm to 10 mm OD copper or stainless steel pipe.

Includes 2 works-adjusted alarms and a potential-free output for driving recorders or external meters. Maintenance:

Regular cleaning of the measuring cell is essential to prevent solids from obstructing the optical sensor. Troubleshooting: A microcontroller compensates for lens soiling by increasing

The manual provides a fault-finding list for common sensor and electronic issues. Support and Calibration Service & Calibration: Calibration must be performed by certified providers like Mackay Marine to meet IMO requirements. Spare Parts:

Replacement parts like O-ring sets and wiper seals are still available through maritime equipment specialists like Replacement:

If the unit fails, Deckma recommends a "service exchange unit" or upgrading to a newer model like the OMD-2008 to ensure continued compliance. or details on the programming mode for adjusting alarm set points? OMD-11 Oil-in-Water Monitor Manual | PDF | Relay - Scribd

Here’s a helpful, practical review of the Deckma OMD-11 Oil Mist Detector Manual — based on common user feedback and technical documentation standards.

B. Optical Offset Adjustment (The Service Menu)

This requires the official service code – usually not disclosed to ships’ crew to prevent tampering. However, the manual details the principle:

  1. A microcontroller compensates for lens soiling by increasing the LED current.
  2. When the required current exceeds 80% of max, the manual signals: Service required – Clean optics.

3.3 Cleaning Cycle

The OMD-11 requires regular cleaning to prevent fouling of the optical lenses.

  1. Manual Cleaning:
    • Stop the sample pump.
    • Press the [CLEAN] button on the control unit.

Fault 3: Intermittent Pre-Alarms – No visible mist.

Fault 5: Blower motor running but no flow