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ATTENTION
The internal lithium battery is rechargeable and should never be disconnected from the converter card when it is
powered by the mains voltage. If this operation should be carried out it could irreparably damage the converter board.
The internal lithium battery is recharged only when the converter is connected to the mains supply (LV, LLV, HV), battery
charging condition, and not with the USB connection.
During charging, the battery symbol appears on the MCP display and flashes blue; see "MEANING OF FLAGS" page 26
(the colors of the symbols can only be viewed in the virtual display of the MCP interface)
When the battery charge falls below the minimum potential, battery low, the fixed red battery symbol appears;
see
interface). Furthermore, in this charging condition below the minimum potential, the measurement does not start when
the USB cable is connected.
The thresholds that identify the condition of Battery low and battery charging are established by the system according
to the use and settings assigned and therefore there is no fixed value..
The two Battery low and battery charging icons can both be present as each one indicates a different condition.
GENERAL OPERATING NOTES
If the mains voltage is disconnected from the converter with HV power supply, the flashing blue icon indicating the
charging status can remain active for tens of seconds. This is due to the energy stored in the HV power supply and in
the capacities of the circuit that discharge slowly.
The battery voltage during charging does not rise immediately but gradually. This is related to the parameters set in
the converter and detected by the controller chip.
When the battery is physically disconnected the potential measured by the system is not true because the charging
circuit checks the battery status by emitting impulses. These load the capacities in the circuit and the average value
detected is not to be considered a reliable real value.
The MCP command [SBCHS] indicates the percentage of charge and is not linear with respect to the battery voltage,
however approximately it reads 0% with a voltage equal to about 3.2 V, while 100% occurs with about 4.1 V. These
values are influenced by the temperature and the total operating time that worked the battery.
