Cardinal Health IVAC 571, Technical & Service Manual

Page: 29 / 104

IVAC® Volumetric Pump (Models 571 & 572) 29/104 1000SM00018 Issue 2
Routine Maintenance
Auto-Pinch-Off (APO) Test
Procedure:
1. Set up equipment as shown below.
2. Prepare a modified set as follows:

Take an IV infusion set and cut the tubing a couple of inches below the drip chamber, discarding the drip chamber.

Connect the air pressure source to the freshly cut proximal end of tubing.

Insert the distal end of the modified set into a container of water.
3. Close the roller clamp. Adjust the air pressure to 10 psi.
4. Load the modified IV infusion set. Close the door then open the roller clamp.
5. Open the door and verify that (after an initial spurt of bubbles) no further bubbles are seen coming from the distal
end of the tubing into the water bottle.
If bubbles continue, replace the auto-pinch mechanism. Refer to Chapter 6, 'Spare Parts Replacement Procedures' for
instructions.
Reservoir
Pressure
Gauge
Air
Pressure Source
Water Bottle
Roller Clamp