UPS for 480 Vac Grid, User Guide, doc. rel. 4.0
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Figure 50: Setup > dc-to-dc options
Figure 51: Setup, DC-to-DC Menus
8.2.3.1.
Battery voltage calibration
This function is used to correct any inaccuracy in the UPS's reading of the battery voltage.
The UPS’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.
Keep in mind that in this screen (Figure 53, and in most screens related to dc voltage) the UPS
displays the battery voltage in two parts: a negative half and a positive half. For example, if the
battery was charged to the ideal level of 540 Vdc, and the UPS’s measurement was perfectly