UPS for 480 Vac Grid, User Guide, doc. rel. 4.0
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Auto Correction is enabled by default. This is the recommended setting for most
situations.
After performing any calibrations or adjustments the Auto Correction feature
should be re-enabled, for optimal system performance.
Figure 39: Modules > dc voltage calibration screen
Each power module’s readings are calibrated before the UPS leaves the factory,
but over time or due to environmental factors the UPS’s dc measurements may
drift slightly.
Calibration of the dc voltage should be performed only under conditions where the UPS's input
and output currents and voltages are stable and not subject to fluctuation.
Dc voltage calibration is recommended to be performed one module at a time, with all the other
modules turned off. (To turn modules OFF, see Section 8.3.2.1.) The reason for this is that the
updated values you enter get sent to all modules that are in the ON state, and you only want
them to affect the module being calibrated.
The readings for the positive and negative components of the module’s dc voltage are calibrated
separately (but on the same screen) and can be increased or decreased separately.
