TECHNICAL INFORMATION
21/24
87-900-053-01 (
F
)
INSTALLATION
Inspect the controller for any shipping damage.
WARNING
The MiniVac controller is shipped with the mating
connector for the 24 Vdc supply. This connector must
be wired to the 24 Vdc source, according to the
connections indicated on the MiniVac rear panel
(Pin 1 = positive, Pin 2 = negative).
High voltage developed in the controller can cause
severe injury or death. Before servicing the unit,
disconnect the input power cable.
NOTE
The MiniVac controller can be used as a bench unit or
as a rack module, but it must be positioned so that free
air can flow through the holes.
Output Polarity Selection
The output polarity is selected by the high voltage
multiplier card, and is factory set for negative output
voltage polarity.
If a change in output polarity is desired, proceed as
follows:
•
Switch off the power and unplug the power cord
from the controller rear panel socket.
•
Undo the 9 screws and then remove the cover.
•
Disconnect the H.V. white wire (1) from the
multiplier board (see the following figure), remove
the board (2) and rotate it 180° horizontally; reinstall
the board into the socket and reconnect the H.V.
white wire.
•
Install the cover and screws.
•
Connect the power cord then switch on the unit and
check on the front panel the output polarity
indication.
Output Polarity Selection
1
2
