Document #: 020-17475-00 Revision: E Page #: 14 of 63
H. CHARGING THE SUPERCONDUCTORS
NOTES:
1. To maintain levitation the superconductors in the levitation head of the LevMixer should
be properly charged. Charging is part of the Power Up mode sequence and is
monitored on the power up window on the touch screen.
2. Charging can only be completed when initiated on a drive unit that has remained in
power off mode for at least 25 min.
3. The system will monitor charging automatically and prevent operators from bypassing
the sequence.
4. The type of impeller (4-magnet or 6-magnet) must be selected prior to charging. It is
imperative that the charging sequence be set for the impeller type installed within the
single-use mixing bag the drive unit will operate. Pall single-use mixing bags employ the
4-magnet set-up as a standard, although the 6-magnet format is available for select
applications.
5. If the LevMixer is transported or stored in temperatures colder than the operating
environment it is necessary to wait 2 hours to equalize the internal temperature of the
drive unit prior to initiating the Power Up mode.
Figure 10: Superconductor charging sequence
CHARGING PROCEDURE:
1. Connect the superconducting drive unit to the appropriate power source (100-230
VAC 50/60Hz).
2. Select the correct charger, matching the impeller type within the mix bag to be used.
3. Remove the protective shield from the magnetic charger and place the charger,
bearing end down, on the levitation head as shown in Figure 10.
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