User manual

Technical Information

Installation

58/70 MiniVac Controller User Manual / 87-900-049-01 (H)

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:

1. Switch off the power and unplug the power cord from the

controller rear panel socket.

2. Undo the 9 screws and then remove the cover.

3. 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.

4. Install the cover and screws.

5. Connect the power cord then switch on the unit and check on the

front panel the output polarity indication.

Figure 9 Output Polarity Selection