This is the "brain." It houses the LCD display, keypad, power supply, and the microprocessor. The manual stresses that the central unit is usually located in the Engine Control Room (ECR).
This is the most referenced part of the manual. The OMD-11 requires a 3-point calibration:
The manual provides step-by-step key sequences for the local HMI, including the engineer-level password (default: 1111 or 1234, but this changes per vessel—check your vessel-specific addendum).
The Deckma OMD-11 manual lists four distinct alarm states. Understanding these saves hours of panic.
| Alarm Type | LCD Display | Likely Cause (per manual) | Action |
| :--- | :--- | :--- | :--- |
| Main Alarm | ALARM + High value | Real oil mist (piston blow-by, bearing hot spot) | Slow engine, investigate crankcase. |
| Pre-Alarm | PRE-ALARM | Rising mist or sensor drift | Increase monitoring, check scavenge fires. |
| Fault Alarm | FAULT + Code E-01 to E-12 | Electronic failure, no airflow, lens broken | Check blower motor, wiring, fuse F2. |
| Low Flow | FLOW ERROR | Blocked sampling tube, blower impeller stuck | Blow out tube with compressed air (careful: 0.5 bar max). |
If you are currently searching for a "Deckma OMD11 manual" because your unit is offline or alarming, stop and look for the original silver CD in the control cabinet. If it is lost, contact Deckma directly – they will email you a PDF after verifying ownership via the unit’s serial number (stamped on the side plate).
Remember: The OMD-11 is a life-saving device. The manual is not a paperweight; it is your legal defense in an incident investigation and your technical roadmap to keeping the crankcase safe. Print two copies: one for the engine control room and one for the technical superintendent’s office. Then, schedule a calibration check according to Section 6.4 – your crew and your engine will thank you.
Need a specific section clarified? Consult the Deckma OMD11 manual’s index for "Calibration," "Modbus," or "Emergency operation." When in doubt, contact Deckma’s 24/7 hotline (found on page 2 of the manual).
Understanding the Deckma OMD-11 Bilge Alarm Manual Deckma OMD-11
is a specialized bilge alarm monitor designed to measure oil-in-water concentrations, ensuring maritime vessels comply with International Maritime Organization (IMO) regulations
. Although this model is an older unit and no longer in active production, it remains widely used and fully supported with calibration and spare parts services. Core Functionality and Specifications
uses a combination of light scattering and absorption sensors to detect oil droplets in a continuous sample stream
. It is specifically engineered with enhanced solids suppression, allowing it to distinguish oil from other particles like iron oxide more effectively than earlier models. 0 – 50 ppm. Alarm Points: Two independent circuits, factory-set at Operating Voltage: 230V 50Hz standard (others available on request). Protection: IP 65 rated for maritime environments. Installation Highlights
According to the manual, proper placement is critical for accurate reporting: Proximity: The monitor must be located within
of the oily water separator to ensure a response time of under 20 seconds. Positioning:
It should be mounted on a rigid vertical surface, ideally at eye level for easy monitoring.
Sample water should be drawn from a vertical section of the discharge pipe to avoid air pocket interference. Operation and Maintenance is designed for constant readiness and low maintenance . Key operator tasks include: OMD-11 Oil-in-Water Monitor Manual | PDF | Relay - Scribd
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: deckma omd11 manual
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:
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
The Deckma OMD-11 is a legacy bilge alarm monitor designed to measure the oil content in water discharge on ships. Developed by Deckma Hamburg GmbH, it was engineered to meet IMO Resolution MEPC. 60 (33) standards, ensuring that oily water is not illegally discharged into the ocean. Key Technical Specifications
The OMD-11 is known for its compact design and improved "solids suppression," which prevents non-oil particles (like iron oxide) from triggering false alarms.
Measuring Range: 0–30 ppm (with a trend indication up to 50 ppm). Accuracy: Better than ±5plus or minus 5 ppm according to IMO requirements. Power Supply: Standard 24V AC/DC.
Alarms: Two independent alarm circuits, factory-set at 15 ppm but adjustable between 2–15 ppm. Output Signal: Reversible 0–20 mA or 4–20 mA.
Physical Specs: Weighs approximately 3.5 kg with an IP 65 protection rating. Installation & Operational Essentials
Proper installation is critical for regulatory compliance and accurate measurement.
Proximity: The monitor must be located as close to the oily water separator as possible.
Distance Limit: Under no circumstances should the distance between the monitor and separator exceed 8 meters; a greater distance causes a response delay of more than 20 seconds, breaching IMO regulations.
Mounting: It should be mounted on a rigid vertical surface, ideally at eye level for easy monitoring. Maintenance & Troubleshooting
The OMD-11 manual outlines specific weekly maintenance to ensure longevity and accuracy: Weekly Flush: Flush the measuring cell with oil-free water.
Cell Cleaning: Use a specialized bottle brush to clean the sample cell tube manually to prevent buildup. This is the "brain
Zero Adjustment: Verify the "Zero" reading using clean water; if the display does not show "0", re-adjust the offset in programming mode.
Calibration: Official calibration cannot be done on-board by crew. It must be performed by the manufacturer or an authorized service provider like Mackay Marine to meet IMO mandates. Diagnostic LED Indicators
The front panel features four main LED indicators for rapid status checks: OMD-11 Oil-in-Water Monitor Manual | PDF | Relay - Scribd
Note: This document is a comprehensive reference guide compiled from general technical knowledge of the Deckma OMD-11 system. For official certification and specific calibration data, always consult the original manufacturer's manual and manuals provided with your specific serial number.
Searching for "Deckma OMD11 manual" often happens because an alarm is already sounding. Here are the top 5 issues and which manual page to turn to:
| Fault Indication | Likely Cause | Manual Page Reference (Typical Rev 5.0) | | :--- | :--- | :--- | | "Lamp Error" | LED driver board failure or degraded LED. | Section 9.2.4 – Test points for voltage (5.2V DC expected). | | "Flow Failure" | Blocked sintered filter on the crankcase fitting or damaged diaphragm pump. | Section 8.3.1 – Filter replacement interval (every 8000 hrs). | | "Zero Offset" | Contaminated reference cell due to oil carryover. | Section 10.1 – Procedure for chemical cleaning of the measuring chamber. | | "Heater Current Low" | Open circuit in the heating element (crankcase cold but not warming). | Section 12 – Wiring diagram for heater (pins 14 & 15 on terminal strip X3). | | Frequent False Alarms | Condensation (not mist) – unit too cold. Manual specifies ambient range -25°C to +55°C. | Section 2.4 – Ensure a heated enclosure is used for cold climates. |
A manual is only useful if the crew can apply it. Create a "One-Page Emergency Card" based on the manual’s Section 11: Emergency Bypass Procedure.
Drill Scenario: Crankcase oil mist alarm sounds during maneuver.
From the Manual:
Post this drill summary in the ECR. The full manual remains the reference for investigation (why did it alarm?).
Search the model name "DeckMa OMD11 manual" on the manufacturer's site or major electronics manual repositories for the complete user manual, wiring diagrams, specs, and fuse types.
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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
is available, covering installation, wiring, and technical specifications. Operational Guide (Yumpu): An interactive 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
2 independent alarms, factory set at 15 ppm (Adjustable 2–15 ppm) Power Supply 24V AC/DC (Standard) Output Signal 0(4) – 20 mA selectable Protection Class Operating & Maintenance Tips Calibration:
IMO regulations require periodic calibration checks. You can contact certified providers like Mackay Marine for on-site service or exchange units. Installation:
The unit should be mounted on a rigid vertical surface, ideally at eye level, close to the oily water separator to minimize response delays. The manual provides step-by-step key sequences for the
The Deckma OMD-11 Go to product viewer dialog for this item.
is a specialized bilge alarm monitor developed by Deckma Hamburg GmbH. It is designed to continuously monitor the oil content of bilge water before discharge, ensuring it meets international environmental standards. Core Function & Compliance
Purpose: Acts as a 15 ppm (parts per million) bilge alarm unit, typically used in conjunction with oil-water separator units.
Regulatory Standard: Designed to meet the IMO Resolution MEPC. 60(33) requirements for monitoring oil content in marine environments.
Measurement Tech: Utilizes scattered light measurement to accurately calculate oil concentration while suppressing interference from solids (like iron oxide). Key Specifications
Measurement Range: 0 to 30 ppm, with trend indication up to 50 ppm.
Alarm Settings: Standard factory set point is 15 ppm, but it can be adjusted on-site to 5 ppm or 10 ppm via the front panel.
Outputs: Provides a 0(4)-20 mA signal output for external meters or recorders and includes two independent alarm circuits.
Environmental Limits: Suitable for sample water temperatures between +1°C and +60°C and designed with an IP 65 protection rating for harsh marine conditions. Installation & Maintenance Highlights
OMD-11 : 15 PPM Bilge Alarm Monitor || Deckma Hamburg - Shivtech
Here’s a forum-style post you could use for a maritime or engineering community (e.g., on Reddit’s r/maritime, r/engineers, or a marine tech forum):
Title: Looking for Deckma OMD-11 Manual – Bilge Alarm Calibration Help
Body:
Hey everyone,
I’m currently working with a Deckma OMD-11 oil content monitor (bilge alarm) and need the original manual (preferably the installation/calibration/maintenance section). We’re having intermittent issues with the 15 ppm alarm threshold drifting during warm-up.
I’ve found a few basic operation sheets online, but nothing with the full service parameters, zeroing procedure, or part numbers for the cleaning kit.
Does anyone have a PDF copy of the official Deckma Hamburg OMD-11 manual they could share? Alternatively, if you know the specific steps for a manual zero calibration after cleaning the measuring cell, that would be a lifesaver.
Cheers in advance.
(For reference: unit is installed on a 2017-built bulk carrier, software version 2.1. We’re MEPC 107(49) compliant, but just doing regular maintenance.)
Based on thousands of hours of engine room logs, here are the top 5 issues resolved by the Deckma OMD-11 manual.