BUCHI Encapsulator B-390 - Manual (Page 49)

8 Troubleshooting
49 B-390 Operation Manual, Version C
8 Troubleshooting
8 .1 Malfunctions and their remedy
The table below lists possible operating errors and their cause. As remedy set the parameter stepwise
in the opposite direction or fix the missing part.
Table 8-1: Possible cause
Problem Possible cause
Unstable liquid stream The liquid flow rate is too low.
The nozzle is not adequately cleaned (frequent cause).
The frequency is too high.
The amplitude is too high.
Unstable bead chain The frequency is too high or too low.
The liquid flow rate is too high or too low.
The Nozzle is not adequately cleaned.
The amplitude is too low or too high.
Non-homogenous bead-size-distribution The liquid flow rate is too high.
The frequency is too high.
The electrostatic tension is too low.
The immobilization mixture is a non-Newtonian liquid, making it
difficult to extrude or to prill.
The bead chain does not separate The electrode is not connected to the control unit.
The electrical tension is too low.
The electrode is not on.
Beads are not visible in the strobo light The vibration unit is not activated.
The vibration unit is not put on the bead producing unit.
The vibration frequency is too low or too high.
The viscosity of the immobilization mixture is too high.