The sensor cell must be placed in a way that minimizes air bubbles in the sample. 4. Wiring and Electrical Connections

The manual details the two critical alarm thresholds:

recommends using a dedicated cell cleaning brush and keeping spare desiccators and O-rings on hand. Calibration Check

Connect the power supply to terminals 1 and 2, ensuring the voltage matches the rating plate on your specific unit.

The most common cause of OMD-11 system errors is a dirty measuring tube. Regular cleaning preserves the accuracy of the optical sensors. Cleaning the Glass Sample Tube Close the sample inlet valve to isolate the unit.

The unit must be properly grounded to prevent electrical hazards. 3. Operating Instructions (OMD-11 Manual)

Use the internal "Zero" potentiometer to adjust the display to read exactly 0.0 .

Use a soft bottle brush dipped in a mild liquid detergent or a specialized solvent (like petroleum ether).

While ship crew can perform routine zero-point adjustments using clean water, require testing with certified calibration fluids. Many port state control officers look for valid calibration stickers. If your OMD-11 fails to hold its zero calibration or suffers from severe optical degradation, the measuring cell must be sent to an authorized Deckma service center or replaced with a modern, type-approved equivalent system to keep the vessel compliant.

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.