Setup > Battery > Battery Current - Gamatronic Centric 50 kVA User Manual

6.1.3.1.3 Automatic battery test interval
The UPS will conduct a periodic battery test automatically according to the time interval specified
here. The time interval is specified in weeks.
6.1.3.1.4 Maximum duration of battery test
Set the maximum time a battery test may continue. If the battery is able to power the load for this
time period without its voltage descending to the "battery low voltage limit", the battery has
passed the test.
6.1.3.1.5 Next battery test start time
Use this function to change/override the start time of the next automatic battery test. The
subsequent battery test interval is counted down from the completion of that test.
6.1.3.1.6 Enable/Disable battery test by current
If you have more than one battery bank and the current sensors are installed, it is possible to
compare the current supplied by each battery bank. If the battery banks do not draw equal
currents, then the battery current test fails when this test is enabled.
6.1.3.2 Setup > Battery > BATTERY CURRENT
The parameters in this section relate to the battery output current.
6.1.3.2.1 Enable/Disable current sensors
Use this function to enable or disable the (optional) battery current sensors.
6.1.3.2.2 Calibrate battery current
This function is used to calibrate battery current reading for any of the battery strings.
The "Set dc current offset" and "Calibrate battery current" functions should be performed only if
the battery current measurement is not correct. They are used only when current sensors are
added to the system.
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.
4. Measure the actual battery current and correct the controller reading (if necessary) using the
"calibrate battery current" function. Note: when the system is operating in battery mode, the battery
current value is negative.
6.1.3.2.3 Set dc current offset
The "Set dc current offset" sets the UPS's dc current measurement to relative zero.
The "Set dc current offset" and "Calibrate battery current" functions should be performed only if
the battery current measurement is not correct. They are generally used only when current
sensors are added to the system.
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.
4. Measure the actual battery current and correct the controller reading (if necessary) using the
"calibrate battery current" function. Note: when the system is operating in battery mode, the battery
current value is negative.
6.1.3.2.4 Set battery current limit value
Use this function to set a limit for the battery output current. There are two options:
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Gamatronic Electronic Industries Ltd.
CENTRIC User Guide, Release 0.3