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 PosiLokTM piston. Pistons are included in your dispense kit.
Problem: The fluid is blowing by the AirFreeTM 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.
27
