Varnish Measurement in Lubricating oil

[NCTHAI]

Team,

I am new to this forum. At our powerplant we are looking for various methods for varnish controls and has installed two different system.

In order to evaluate oil conditioning system for varnish removal, have taken sample before and after systems were in place.

Can you please let me know if there is any standard method for measuring varnish in lubricating oils used in power plant equipments?

Thanks,

 

[cloa]

Might I suggest reposting in Tribology forum.