Methods for Taking an Oil Sample
#1 (Most preferred)Take the sample from the
return line upstream of the return line filter, use a suitable ball
valve of sampling fitting.
- Make sure the system has operated for at least a ? hour before taking
the sample, and that the system has not been shut off for more than
15 minutes or ? hour maximum because settling occurs.
- Fully open the ball valve and flush from 200ml to 600ml (1 to 3
bottles) of fluid to clean the line. Remove the lid from the bottle
being careful not to get it dirty, then insert the bottle in the flow
stream. When the bottle is 2/3 rd –3/4 th full remove the bottle. Do
not open and close the valve while filling the bottle as debris from
the ball valve may contaminate the sample. Immediately replace the
cap on the bottle.
#2 Take the sample from the center of the reservoir.
- Make sure the system has operated for at leas a ? hour before taking
the sample, and that the system has not been shut off for more than
15 minutes or ? hour maximum because settling occurs.
- Use a suitable suction pump to draw a sample from the center of
the reservoir.
- The most common place to enter the reservoir is by removing the
filler breather and screen. Be careful not to get debris in the oil
during drawing.
- Do not take the sample from an unused down-comer tube as the oil
will be stagnant and usually dirty in the tube.
- Locate a clean stiff wire and tie the ? OD clear tube at the base
of the wire. Allow the hose to protrude about 1” below the end of the
wire.
- Carefully lower the tube and wire into the fluid being careful not
to touch the side of the reservoir, pipes and other obstacles.
- Draw the sample from as near the center of the reservoir as possible.
- Fill the bottle 2/3 rd – 3/4 th full.
- Immediately replace the cap on the bottle.
IMPORTANT NOTES:
? Never take a sample by unscrewing a fitting or hose and filling the
bottle. Great quantities of contamination are generated during this process.
? The quality and accuracy of your sample will be in proportion to how carefully
these procedures are followed.
? If you have any questions please feel free to contact one of our lab technicians,
they will be happy to assist you.
