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Frequently asked questions


Here is a list of our most frequently asked questions. For more information about Mimic, or if you have a query, please contact us here.

Condition Based Maintenance is a predictive equipment maintenance strategy. The condition of machinery/equipment is measured in order to assess whether they may fail during some future period, and then taking appropriate action to avoid the consequences of that failure. By doing the right maintenance at the right time rather than just operate a calendar based maintenance regime can have significant positive impact on your profit.

Classification societies have now recognised the potential for reliability based maintenance approach and have started to adapt their requirements and introduce a Condition Monitoring Notation alongside the traditional planned maintenance requirements. Instead of inspection and opening up equipment Class societies will increasingly accept, trending of vibration, performance monitoring and evidence of other non intrusive Condition Monitoring methods as the basis for inspection and survey.

The unnecessary work of opening good machines can be avoided, labour costs and spare part consumption goes down. The process of doing this monitoring is Condition Monitoring. Condition Monitoring is a maintenance process where the condition of equipment is monitored for early signs of impending failure. This can be done automatically with the use of instrumentation which includes, but is not limited to, technologies such as:

  • Infrared Thermography
  • Oil Analysis and Tribology
  • Ultrasonics
  • Motor Current Analysis
  • Vibration Measurement and Analysis
  • Visual checks

Faults develop within machinery regardless of even the most thorough and comprehensive scheduled maintenance with often undetected faults leading to unexpected failures before your next scheduled maintenance break.

Condition Monitoring puts you in control allowing you to be pro-active in preventing breakdowns, helping you avoid unplanned shut downs and allows you to optimise maintenance resources where and when they’re needed.

Condition Monitoring measures the health of a machine by routine monitoring and analysis of data. Efficient and non-disruptive to production and has the proven potential to save thousands of pounds in secondary damage, lost production and unnecessary maintenance. Condition Monitoring is a proven, preventative maintenance strategy that provides early indication of preventative faults.

No. Condition Monitoring techniques can be applied to any machinery and plant regardless of age and operating environment. Condition Monitoring can be implemented in many different ways and can be tailored and customised to meet even the most demanding of customers and situations.

Protection systems are designed to ensure the safe and efficient operation of a vessel. When a system component develops a fault the Protection system communicates the condition to the vessel operators and takes the appropriate safety action. Depending upon the system and its level of operation there may have been no prior warning of the fault and whilst the vessel and its crew are safe it is possible that the owners are losing money because no-one predicted the fault was coming.

Data gathered by Monitoring systems is turned into powerful information to allow predictive trending of faults to be made. By having the knowledge that an incident is about to occur provides the operators with the opportunity to avoid the failure and save money.

The simple answer is that all ship borne machines and systems should receive some degree of monitoring. In many cases this may be a simple visual inspection, in others performance monitoring may be justified. However in some cases the machinery is judged as critical to the ship’s function (such as propulsion systems and/or cargo pumps) so more detailed Condition Monitoring is required.

The best Condition Monitoring technique can only be determined when you know the answers to the following questions: What is the machine? Where is the machine? And what is it for? You then link that into the available budget and the risk that the ship owner wants to take/allowed to take and only then can the best CM technique for that specific application be chosen.

All CM techniques have their advantages and disadvantages. Where companies have chosen to do vibration monitoring and ignored all the others then it is most likely that they have failed to achieve very much. The companies that take an integrated and intelligent approach (answering the points above before choosing what to do) stand a much better chance of actually achieving something with CM.

On-line Monitoring is the modern labour saving method of collecting good quality data at the correct periodicity. It refers to a system which is permanently connected to sensors on the machinery being measured. There are many different methods of conducting on-line monitoring dependent upon the machine type, the data to be collected, the rate (periodicity) of data collection and the type of monitoring technique to be used. Each choice should be made based on the criticality of the machine vs cost of the implementation.

Vibration Monitoring is one of many predictive maintenance methods that provide early fault detection in rotating machinery. It can be used on almost all rotating machines such as motors, gearboxes, fans, shafts, compressors, pumps, mixers, driers centrifuges, engines and hydraulic power packs. Vibration Monitoring can identify component faults - such as defective bearings, imbalance and misalignment by using proven diagnostic techniques applied to a machines measured vibration signature.

There are differences in the data recorded from ships' machinery due to a number of factors, not least of which are ballast vs. laden, weather and sea state and even propellor shaft speed vs. depth of water. Whilst this can have a dramatic visual effect on the data, experienced ships' operators, condition monitoring data analysts, and sufficient quantity and quality of collected data, can overcome the effects.

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