There are various techniques available, some of which are oil ageing, particle counting, vibration monitoring. It really depends how much time you are prepared to put in, and what you expect to achieve. can you be more specific? Equipment type, oil type, operating conditions, expectations? Matt
Fundamentals are:1/ criticality of the plant, monitor all crucially important plant systems. 2/ systems with high volume of lubricant can be monitored to optimise drain periods 3/ Contamination is the major cause of problems in lube oil systems Take regular planned samples, most information is gained by trend analysis of the results and provide your laboratory with as much plant and lube oil information as possible as this enables the lab to provide better diagnosis. Samples must be representative of the system--take care!!