CM Methods

Condition monitoring and diagnostic technology 

Acoustic Emission
The mechanical degradation of machinery is accompanied by various processes, which are driven at a microscopic level by transients that release stored elastic energy in a localised region. Each of these events launches an elastic wave that propagates throughout the surrounding material. Acoustic Emission (AE) is a technology based on listening to the high frequency component of these structure borne sounds (typically between 25 kHz and 1 MHz). When machinery operates, the possible sources of AE include impacts, friction, particulate crushing and metal removal. The intensity and quantity of these sources generally increases as degradation progresses. READ MORE >>>

Infrared ThermographyInfrared thermography is the technique that uses an infrared imaging and measurement camera to “see” and “measure” invisible infrared energy being emitted from an object. Thermal, or infrared, energy is energy that is not visible to the human eye because its wavelength is too long for the sensors in our eyes to detect. It is the part of the electromagnetic spectrum that we perceive as heat. Unlike visible light, in the infrared spectrum everything with a temperature above absolute zero emits infrared electromagnetic energy. Even cold objects such as ice cubes emit infrared radiation. The higher the temperature of the object, the greater the infrared radiation emitted. The infrared camera allows us to see what our eyes cannot! READ MORE >>>

Vibration Analysis
Vibration monitoring is the oldest type of machine monitoring technique and is the detection of the oscillation of a surface or structure up to a frequency of approximately 25 kHz. Vibration is detected and measured by using transducers to convert vibration energy into an electrical signal. The parameters measured are displacement, velocity and acceleration. Potentially all reciprocating and rotating machinery with moving parts can generate vibration and hence can benefit from vibration monitoring. READ MORE >>>

Ultrasound Technology
Ultrasonic instruments offer test flexibility in that these instruments can be used for electrical, mechanical and leak inspection. If the goal is to have a truly world-class predictive maintenance programme, the use of multiple technologies is recommended for various inspections. Just as a physician uses multiple tools to take vitals and diagnostics to determine aches, pains and abnormalities, maintenance professionals should take the same approach when it comes to the assets that we are responsible for in our facilities. In addition to using infrared and vibration, ultrasound can be used along with other condition monitoring technologies. READ MORE >>>

Tribology and Wear Debris Analysis (Lubrication Management)This method is used in systems employing petroleum-based or synthetic fluids such as lubricants or working media (hydraulic systems) and is based on analysing the wear debris entering the circulating fluid system to detect the onset of damage. The wear debris is analysed by:
  • Shape
  • Size
  • Number of particles
  • Type
  • Chemistry
  • Morphology and condition of particles. READ MORE >>>