USC LP2000 Operator's Manual page 41

11. As soon as one minute is up, position the Calibration Valve back to
"RECIRCULATE". Read the level on the side of the measuring cup. This
number should equal the number of ounces needed to flow through the pump in
one minute. If the ounces needed per minute have not been met, adjust the
pump speed up or down accordingly and repeat steps 9,10, & 11 until the liquid
flow rate has been matched.
Calibration Valve Calibration Hose