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UPS for 480 Vac Grid, User Guide, doc. rel.4.0
To calibrate battery current:
1.
Operate the UPS without a load and with batteries disconnected.
2.
Perform the Set dc current offset function (only if the measured current is not zero).
3.
Connect the UPS to its batteries and to a load and operate the UPS in battery mode.
Figure 70: Calibrate Current
4.
Measure the actual battery current and correct the controller reading (if necessary) using the
Calibrate battery current function.
When the system is operating in battery mode, the battery current value is negative.
8.2.4.2.3.
Set dc current offset
The "Set dc current offset" sets the UPS's dc current measurement to relative zero.
