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OMD-3 24ch

Oil Mist Detector · Oil Mist Detection

Class-certified type (DNV register) · technical data sheet not yet verified

Consilium Salwico OMD-3 24ch — Oil Mist Detection.

Specifications

Technical data.reference — unverified

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Detection methodscattered light
Alarm threshold mg (l)2.5
Channels24
Engine cylinders max24
Inspection

Inspector Detail

Common issues

  • Sample line or sensor head fouling with oil residue, reducing sensitivity
  • Sample pump/fan failure reducing sample flow below the detection threshold
  • False alarms from condensation or dirty optics in the detector head
  • Sample tube blockage at individual cylinder monitoring points
  • Calibration drift over time requiring more frequent zero/span checks

Inspection checklist

  • Check sample flow rate at each monitored point against the maker's specification
  • Inspect and clean sample lines/tubes for oil residue or blockage
  • Verify alarm and shutdown function via the test/simulate mode
  • Check the detector head optics for fouling and clean per maker's instructions
  • Verify sample fan/pump operation and filter condition
  • Confirm the alarm threshold setting matches the class-approved value
  • Check power supply/battery backup status
  • Inspect wiring and connections at the detector unit and control panel

Service intervals

Functional/alarm testweekly to monthly per the vessel's safety management system or class requirement
Sample line cleaningper maker's schedule, or when flow indication drops
Calibration/zero checkper maker's schedule, typically every 6-12 months
Detector head cleaningper running condition, at least at each cylinder-unit overhaul
Sample fan/filter maintenanceper the maker's running-hour interval

Critical spares

  • Sample line/tube fittings
  • Sample fan/pump unit
  • Detector optical sensor head
  • Fuses/power supply module

Safety

  • Never disable or bypass the oil mist detector to suppress nuisance alarms - it is the primary crankcase explosion early-warning device
  • Follow the correct isolation procedure before opening the crankcase for detector head access
  • Treat any oil mist alarm as genuine until proven otherwise - reduce load or stop per the engine's emergency procedure

Class survey

Class requires the oil mist detector to be tested for correct alarm/trip function at each survey and after any maintenance affecting the sample system. Detector coverage must correspond to the number of monitored crankcase compartments, and functional test records should be retained onboard as part of the engine's safety documentation.

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