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Oil Analysis Without Particle Counting?
Chris Culbreth, Account Manager, Analysts, Inc
First of all, this scenario does not mention if proper sampling
techniques are being employed. If the sample is being taken immediately
post-filter, then particle counts from the sample will always
be low, and may not be representative of the system. This may
be cause for investigation.
Discontinuing particle counts is not a recommended course of
action. Assuming sampling techniques are proper, consistently
low particle counts are ideal for critical turbines, compressors,
and hydraulics. The goal now should be to maintain this level
of cleanliness. The best way to assure that the cleanliness of
the system is being maintained is to test the system regularly.
Also, even though there has never been a problem with particles
to this point, there's no reason to think that there won't be
a problem in the future. Especially in this situation where the
levels are always low. When a baseline such as this is established,
it's a great time to possibly adjust alarm limits. A sudden rise
in particles which may not trigger an alarm in other systems might
be cause for alarm in this system due to it's constant cleanliness.
The bottom line is that you should never abandon a particular
test simply because you have never had an abnormal result from
it. All it takes is one abnormal result to contribute to a major
problem, and catching this one problem will more than provide
the "justification for spending the time and money."
See other responses
to this Readers Challenge.
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