Trouble Shooting - Bartels Mikrotechnik mp6 Operating Manual

9. Trouble shooting

Observation
Maximum flow rate
cannot be achieved
Non-linear flow behavior
Fluid is flowing through the system
although pump is switched off
No buzzing sound =
pump is not working
For further notes on troubleshooting please also refer to our online Q&A section on the micropump website
http://www.micro-components.com/index.php/support/qaa
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Trouble shooting
- Gas bubbles within the system, the compressible gas volume
in the pump can result in decrease of pump rate = system
should be primed with a syringe.
Manual priming should be carried out by flushing the pump
with the help of syringe. Only pull the fluid from the outlet in
pumping direction. Do not exceed 1 bar of internal pressure.
- Tubing is too long = shorten tubing
- Tubing diameter is too small = use appropriate tubing with
an inner diameter of 1.3 mm for the mp6 and 1 mm for the
mp6-pp
- Back pressure is too high = reduce pressure or lower outlet
reservoir
- Check signal form used to drive pump = highest flow rate is
achieved by SRS signal and at resonance frequency (100 Hz
for water)
- The flow rate is viscosity dependent as described in 3.2
- The linear range of the pump characteristic is described for
selected media in 3.2
- Gas bubbles in the pump act as compressible volume and
when they are digested through the pump this can lead to
non-linear flow behavior = system should be primed with a
syringe as mentioned above
- The valves inside the pump are opening and closing by
differential pressure of in- and outlet = lower in- or outlet
reservoir to avoid hydrodynamic behavior or add check valve
as described in chapter 9.
- Please check if the mains adaptor is correctly connected
- Please check if the connection between pump and the Molex
connector is correct according to chapter 4.1.1
- Defect piezo actuator = contact Bartels Mikrotechnik for
support
Bartels Mikrotechnik GmbH, Otto-Hahn-Str. 15, 44227 Dortmund, Germany
www.micro-components.com, microComponents@bartels-mikrotechnik.de
Tel: +49-231-9742-500, Fax: +49-231-9742-501