21.3 Fluid recovery
During fluid recovery, the flow direction is reversed.
Ensure reverse flow is not prevented by peripherals such as a non-
return valve.
Ensure the flow is into a container with enough volume for the
recovered fluid.
Assess the contamination risk when determining the viability of
the recovered fluid.
The pump runs in reverse at a fixed slow speed to recover fluid.
Press and hold both keys simultaneously. When either key is released,
fluid recovery will stop.
21.4 Priming the pump
Before dispensing can take place, prime the pump by filling the tube with fluid and
ensuring air is eliminated from the line.
Procedure
1. Run the pump continuously using prime slow or prime fast until fluid is
observed leaving the nozzle (Refer to "Priming and continuous pumping mode"
on page 67 )
21.4.1 Eliminating trapped air from the tube
Trapped air bubbles in the tube will cause inaccuracies in the volume of dispensed
fluid. It is recommended to remove all air bubbles from the tubing before
dispensing.
Procedure:
1. Using fingers, squeeze the tube and push air bubbles along the tube and back
into the fluid container or towards the pumphead and nozzle
2. Repeat until no air is visible inside the tube
PF7/PF7+ Peristaltic Filler with QC14 Pumphead User Manual 69
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