Sampling Fluids at Atmospheric Pressure
Remove the sampling valve cap and clean the valve port. Use a pressure gauge to verify the unit pressure if uncertain.
Insert one end of the new tubing onto the sampling probe piece and the other end into the vacuum sampler so that it is just slightly below the vacuum sampler face. Tighten the knurled nut on the sampler. Tightly thread on a purge bottle to receive the flush fluid.
Connect the sampling probe to the sampling valve and purge 10 times the dead volume by pumping the vacuum sampler. Loosen the knurled nut (or depress the vacuum-release button) to stop the flow of oil.
Open a sampling bottle without opening the plastic bag.
Tightly thread the sampling bottle onto the vacuum sampler (the hose end must puncture the bag).
Extract an oil sample by pulling the vacuum pump handle. Fill the bottle to no more than three-fourths capacity. Loosen the knurled nut (or depress the vacuum-release button) to stop the flow of oil.
Unthread the probe from the sampling valve.
Unthread the sampling bottle from the sampler without opening the plastic bag. Thread the purge bottle back on the vacuum sampler. Draw waste fluid from the tube into the purge bottle.
Cap the sampling bottle without opening the plastic bag.