PRELIMINARY
Document type: Title: Revision date: Revision:
User's Manual (MUT) N1471 4 Channel Programmable HV Power Supply 24/03/2010 1
NPO: Filename: Number of pages: Page:
00112/07:N1471.MUTx/01 N1471_REV1.DOC 38 37
4. Internal Settings
4.1. Polarity selection
The output polarity is independently selectable for each channel. Note that the polarity is
indicated by two LEDs for each channel on the front panel (see § 2.4.2).
In order to change the polarity the unit must be switched off and wait for the complete
discharge of the capacitors then remove the side covers thereby making access to the
Printed Circuit Boards. Antistatic Gloves must be worn before touching any internal part.
Lay down the unit, NIM crate connector on the right and the front panel on the left,
components side up and refer to the following figure (the blue arrow indicates diode
bridge box placed to configure channel as POSITIVE).
Fig. 4.1: Polarity selection instructions
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