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Troubleshooting
Problem: The fluid continues to ooze long after the dispense, (including
drawback) is completed.
Potential Solutions:
•Check the needle size. The unpredictable nature of the
pneumatic drive system has forced customers to use the needle as
a flow control. What this means is that they use an ultra small
(25G) needle to control the flow fluid because the pneumatic
drive system can’t.
IMPORTANT: Using an ultra small needle works against our system.
Because we positively displace, we can get the same amount out of a
14G as a 25G. Use the needle with the largest I.D. and shortest length
possible, preferably a free flow tip, to reduce backpressure.
•Check that the syringe is packaged air free. The presence of air
will cause oozing. It is recommended the syringes be packaged
using centrifuge or vacuum when possible.
•Make sure you are using an PosiLok
TM
piston. Pistons are included
in your dispense kit.
Problem: The fluid is blowing by the AirFree
TM
piston.
Potential Solutions:
•Examine the seal of the piston. Sometimes syringe fillers, either
by rushing or attempting to squeeze air out, allow fluid to
permeate the front seal of the piston. When the front seal is
maintained the piston will not leak. Also, adding a Fishman Piston
Stabilizer will help. See Accessories for ordering information.
•Make sure you are using Fishman Syringes. The inner diameter
has been preloaded into the software for dispense calculations.
Competitor’s syringes have different diameters, which will cause
problems trying to achieve the dispensed amount.