Equipment and Material Required
·
Doppler Flow Pump Model 769
·
Model 769DF Doppler Fluid
Procedure
1.
Select a clean, flat, stable working surface.
2.
Check to make sure all of the above equipment/materials are available.
3.
Set-up the Doppler Flow Pump according to the manufacturers directions.
4.
Arrange the system components to provide easy access during a testing procedure. The phantom
should be positioned near the pumping system.
5.
U
se provided coupling hoses to connect pump to the phantom.
6.
Gently shake the Doppler Fluid to ensure any material which may have settled to the bottom is
combined with the solution.
NOTE: In the operation of any flow phantom it is likely that some air bubbles will enter the fluid stream;
either through cavitation in areas of expanded diameters or entrainment of air at a fitting or connector. For
these reasons a large reservoir is required. As the pump begins to circulate the test fluid through the
system, entrapped air bubbles will enter the fluid and be pumped into the return side of the reservoir.
A large reservoir will allow enough time for the entrapped air bubbles to separate from the returning test
fluid. The air bubbles may appear as foam and will float on the top of the test fluid on the return side of the
reservoir.
NOTE: WHEN USING WITH THE MODEL 769 DOPPLER FLOW PUMP, THE PRESSURE WILL NOT EXCEED
9 PSI, EVEN AT THE MAXIMUM FLOW RATE OF 750 ML/S.
IF YOU NOTICE AN OBSTRUCTION IN THE
FLOW CIRCUIT, IMMEDIATELY TURN OFF THE PUMP
.
The phantom is now ready for performance testing.
CARE RUBBER-BASED PHANTOMS
For best results the phantom should be kept clean at all times and stored at room temperature. In
particular a build-up of dried coupling gel on the scan surface should be avoided. The phantom may be
cleaned with warm water using a lint free cloth. Particularly stubborn stains and dirt may be removed
with a mild household cleaner. The use of petroleum solvents should be avoided since they may
adversely react with the rubber-based material.