UPS for 480 Vac Grid, User Guide, doc. rel. 4.0
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Figure 53: Battery Voltage Calibration screen
2.
Compare your measured value to the number to the right of the screen (Figure 53), which is
the UPS’s measurement.
3.
If the value you measured differs from the UPS’s measured value, enter your measured value
into the field labeled Battery negative dc voltage (Figure 53).
4.
Next, measure the voltage between the positive (“+“) battery bus bar and the midpoint bus
(Figure 52).
5.
If the value you measured differs from the UPS’s measured value, enter your measured value
into the field labeled Battery positive dc voltage (Figure 53).
6.
Press Confirm.
The corrected positive voltage measurements are applied.
8.2.3.2.
Dc voltage calibration
This function is for correcting any inaccuracy in the UPS’s display of the dc voltage. (This is the
output voltage of the dc-dc blocks, not the battery voltage. The rectifier’s output voltage is fed to
the Inverter and is also used to charge the battery.)
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.
