The 6-point fault finding technique is a method for finding and fixing mechanical operating malfunctions. You will have an understanding of the basic fault location methods and techniques used, and their application. This can be very useful when your other test instruments (voltmeter and ohmmeter) are not appropriate. Start from the output and see if it works, then follow the steps ahead of the output and test if the steps are linked as expected. Fault Finding Process. If you already know the fault symptom, look at the fault symptom index in Chapter 3 of this volume. Split the circuit in half. Essential items in the fault-finding toolbox, (two even better than one,) they allow you to measure both voltage and current. FMEA/FMECA and the fault hazard analysis is a matter of depth. This usually means fixing the cause of the fault or implementing some kind of maintenance. Faults can become visible with thermal imaging when energized. Location of a defect or fault found through inserting known data signals or functions at selected test points of the system or process. Here is a simple way to help you successfully fault find failed equipment. After analysis, the fault in the system is located with the aid of evidence analysis. The environmental conditions of the mechanical equipment and components must also be taken into consideration. Using an Ammeter. Steven Devine, author of Student’s Guide to the IET Wiring Regulations, takes us through the essentials of Fault Finding. Rectify the Fault. SEMEMI205 Carrying out fault location on mechanical equipment assist in locating the fault: 1. information gathered from the person that reported the fault fault finding techniques (such as six point, half-split, input/output, unit substitution, emergent sequence) 2. diagnostic aids (such as manuals, flow charts, troubleshooting guides, maintenance records) 3. inspecting (such as checking for breakages, … A COVID-19 Prophecy: Did Nostradamus Have a Prediction About This Apocalyptic Year? You will also know how to interpret information obtained from fault finding aids and What Is the 6-Point Fault-Finding Technique. Half-splitting can also be used in all types of circuits, not just series-wired switches. If you have a supply and an earth, you would then check for voltage about half way along the circuit. Take for example an X-Ray unit. Two approaches can be distinguished: A direct pattern recognition of sensor readings that indicate a fault and an analysis of the discrepancy between the sensor readings and expected values, … It will evolve over time, especially based on input from the LinkedIn group Fault Detection and Diagnosis. These steps include collecting evidence, analyzing evidence, locating faults, determining and removing causes, rectifying faults and running a systems check. These are the 2 types which I am concerned about. Our results are consistent with the main methods used for fault diagnosis, the shock pulse method (SPM) and the vibration spectrum analysis (VSA). Faults in distribution systems with distributed generation can be identified using conventional methods such as travelling wave based, impedance based method and artificial intelligent methods. With a series combination of one steps feeding the other, the diagnoses is rather simple as one fault in the link can be determined through studying one step after another. All solenoid valves should have an indicator in the plug tops to allow electrical signals to be observed local to the valves. Removing parts of the circuit and testing to see if the fault is still present can also be used to find ground faults. My initial approach is the following: 1. Identify three possible faults that could cause this problem to occur, and identify what components of the stereo system are known to be okay (be sure to count each cable as a separate component of the system!). Volt drop testing is the most accurate method to diagnose an electrical fault on a vehicle. This could be expected to include mechanical test equipment, historical data and schematic drawing K4 you must have a working knowledge and understanding of fault finding methods and techniques this should include how to investigate problems, how Detection of an antifriction bearing faults is one of the most challenging tasks in bearing health condition monitoring, especially when the fault is at its initial stage. K3 you must have a working knowledge and understanding of fault diagnostic aids. Fault detection and diagnosis is a key component of many operations management automation systems. Mechanical, structural, and electrical faults are errors in asset integrity and function that interrupt equipment operation, cause accidents in your facility, and create a huge hazard for personnel. That said, there are some engineers who have a natural talent for the task. Environmental conditions can increase plant deterioration. Plant is often operating outside and is therefore subject to extremes of weather which may result in additional corrosion and wear. Fault detection, isolation, and recovery is a subfield of control engineering which concerns itself with monitoring a system, identifying when a fault has occurred, and pinpointing the type of fault and its location. Split half technique is used when fault finding on an electrical circuit. Collect the Evidence. The Fault Hazard Analysis of a subsy stem is an engineering analysis that answers a series of questions: Troubleshooting with the Technical Manual - Continued (3) Do the checkout procedure in Volume I, Chapter 2 from the beginning until you find a fault symptom. They also measure resistance , over a huge range, and may have a built-in continuity tester (giving an audible tone for low resistance). Faults are not always apparent with conventional testing. Test each component in the failed system operates as it ought. In many cases this allows for instant fault diagnosis which in serious cases can be brought to the client’s attention immediately, allowing the necessary remedial action to take place at an early stage. Analyse the Evidence. Determining or removing the cause of a problem is the next step to follow the location of a system fault. Key points Fault diagnosis of rotating machinery plays a significant role for the reliability and safety of modern industrial systems. Once the collection is complete, an analysis to consider the validity of the information collection begins. with the fault. Mechanical fault diagnosis and predictive maintenance through thermal imaging/thermographic techniques. A “fault” is another word for a problem. Fixing plant and equipment about which you know little is daunting. Target is to achieve more of planned maintenance. For example, measuring the current in each phase of a 3 phase motor can provide very important clues as the motor behavior. If one is in doubt as to... 2. This deterioration of mechanical equipment and components is not always apparent or detected by conventional checks such as routine monitoring and maintenance or vibration and oil analysis. If the generator has been running okay and then fails to start (or the engine speed varies rapidly), then it's likely to be fuel or an electrical problem with the safety circuits. That is when we achieve reliability. Instant fault diagnosis. Check the System. Faults include any unanticipated discontinuities in the normal operation of assets and equipment. technique used to identify and predict mechanical anomalies in industrial machinery Half-splitting can be used to find many electrical problems aside from open switches. NOAA Hurricane Forecast Maps Are Often Misinterpreted — Here's How to Read Them. Fault finding practice In this first of a series of troubleshooting articles, we will focus on tips and techniques for more efficiently correcting the source of an intermittent fault. This deterioration may be in many forms, for example, vibration and misalignment, friction and wear, under or over lubrication. There are certain conditions and actions that exist in order to execute these six steps. However, when running and under load, these faults can become clearly visible with the aid of thermal imaging techniques. Use ‘telltale’ methods to prove the presence of the function at various parts of the system. One of these conditions is that safety comes first, and these steps should not be taken unless it is safe. Recommended approach to fault finding. We do all predictive, fault finding to avoid Unplanned maintenance. Split the half. The HALF-SPLIT method is very powerful in locating faults in medical devices made up of a large number of blocks in series. Determining the cause of a fault obviously depends on the circumstances. This includes mechanical testing and inspection for equipment and component deterioration from vibration and misalignment, friction, wear and under or over lubrication. COFFEE! (4) When a fault symptom is found, go to the chapter noted and follow the maintenance procedure given there. All the evidence collected must be relevant to the problem in hand. TM 9-254 7-12. This guide to fault detection and fault diagnosis is a work in progress. These steps include collecting evidence, analyzing evidence, locating faults, determining and removing causes, rectifying faults and running a systems check. Remove the Cause. Taking samples data signals or operational functions at selected test points and comparing the measurements or results against known commissioning of operational values. Divide the equipment into logical systems. 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