Condition monitoring

PARTICLE  COUNTING  Particle counting  is the technic used to monitor the solid contamination of new and in-service Oil. When implementing machine condition monitoring for machinery  lubricating oils , typically the first strategy you implement is contamination control.   Particle counting standards: which define permissible limit of contamination size and quantity in lubricating & hydraulic oil .  ISO 4406 Standard NAS 1638 standard ISO 4406 Standard: The ISO 4406/2000 classification of particle contents was introduced to facilitate comparisons in particle counting. Sudden breakdown in an oil system is often caused by large particles (>14 micron) in the oil while slower, progressive faults, e.g. wear and tear, are caused by the smaller particles (4-6 micron). This is one of the explanations why the particle reference sizes were set to 4 micron, 6 micron and 14 micron in ISO 4406/2000. A typical sample contains in every 100 ml of oil: 450,000 p...