Fluke Biomedical IDA-4 Plus - Manual (Page 23)

3-1
Chapter 3
Operating Instructions
This chapter discusses and illustrates the method
of connecting units under test and the
various operational modes.
Connecting Infusion Pumps under Test
See Inlet Hose Connections and Outlet Hose Connections drawings.
The Inlet Hose Connection drawing on the next page shows a method of connecting the
inlets from units under test together with a priming syringe, both connected via a 3-way
tap.
This method is the only method that should be employed with this instrument.
The Outlet Hose Connection drawing on page 3 shows the drain hose connections from the
unit to an open drainage collection vessel. Please note that the drain Fluid Outlets should
each have an independent hose to the drainage vessel and should not be joined in any way.
Note: Infusion device measurement accuracy is also affected by the
compliance of the infusion device and delivery tubes. This is because
there is a momentary blockage of flow when the measurement
transducer is emptied. The back-pressure created by these events
could cause some of the flow to be diverted into the compliance of the
infusion device. For most infusion devices, the effect is trivial (less
than 0.5%), but with very soft connecting tubing and large air pockets
in the device or tubing, it could be significant. The tubing between the
infusion device and the IDA-4 Plus should therefore be fairly rigid
and all air should be removed before starting each flow test. At high
flow rates it may be desirable to increase the compliance of the inlet
tubing (longer or softer tube) if the back pressure interferes with the
occlusion sensing alarms in the infusion device.