How do you test an oil mist detector?
The oil mist chamber is to be fitted with a recirculating fan. 8.1. 1.3 Samples of oil mist are to be taken at regular intervals and the results plotted against the oil mist detector output. The oil mist detector is to be located adjacent to where the oil mist samples are drawn off.
How does the oil mist detector work?
The oil mist detector uses photoelectric cells to measure small increases in oil mist density. A motor driven fan continuously draws samples of crankcase oil mist through a measuring tube. The rotary valve which draws the sample then stops to indicate the suspect crankcase.
What are the precautions that you should do when the oil mist detector alarms?
How will you take action when oil mist detector alarm is on ?
- Inform to chief engineer.
- Inform bridge, take the permission to stop the engine.
- Gradually reduce the engine and then stop.
- Cool down the engine.
- Check the inside parts of the crankcase inspection.
- Make necessary repair.
- Reset OMD and start engine.
What is crankcase oil mist detector?
1. Oil Mist Detector. The Oil mist detector takes continuous samples from the main engine crankcase and check whether the sample concentrations of mist are well below the level at which a crankcase explosion can take place.
How does light pass through an oil mist detector?
The lenses seal the tubes but allow light to pass. Two identical beams of light from the centrally positioned same lamp, are reflected by mirrors to pass along the tubes on to the cells.
How does crankcase oil mist detector ( OMD ) work?
Crankcase Oil Mist Detector Working It basically comprises two parallel tubes of similar size, each having a photo-electric cell (these are light sensitive and generate an electric current which is proportional to the intensity of the light falling on their surface) fitted at one end. The lenses seal the tubes but allow light to pass.
Can a visatron system detect high oil mist?
•design, suitable for the monitoring of trunk pis- Basic ton diesel engines with in-line and V cylinder arrange- ments, running at medium and high speed. • in the case of dangerous oil mist generation, Alarm sig- nal via Alarm relay for High oil Mist. no indication of oil Mist source location. visatron® Vn116/87plus
What is the scope of an oil mist test?
Scope 1.1 To specify the tests required to demonstrate that crankcase oil mist detection and alarm equipment intended to be fitted to diesel engines satisfy classification society requirements. Note: This test procedure is also applicable to oil mist detection and alarm equipment intended for gear cases. 2. Recognised Standards
