GRAUPNER ULTRA DUO PLUS 80 Operating Manual page 45

memory, the discharge current is automatically set to 4.4 A. The discharge current can be set to any value in the range 0.1 to 10 A, taking the maximum
discharge power into account. If the unit is unable to discharge at the selected current, the process does not take place at the maximum possible current.
If this should occur, the screen displays the discharge current actually in use.
WARNING: it is essential to observe the maximum discharge current for your battery! This is generally printed on the pack itself. If you
are unsure, discharge the battery at no more than 2C (e.g. 4.4 A for a 2200 mAh battery). If the battery is discharged using incorrect
settings, the result could be serious damage to the battery, or even a fire!
The final discharge voltage is generally printed on the battery itself. As standard the charger displays the value matching the selected battery type (see
table in Chapter 12), and we recommend that you leave this value unchanged to avoid damaging the pack through deep-discharging. The final discharge
voltage can be set to any value in the range 2.5 to 3.9 V / cell. On no account set a value below that printed on the battery itself!
With the Select arrow at the Discharge (DCHG) line, start the discharge process by holding the ENTER button pressed in for two seconds.
Cut-off temperature CUT. TEMPER.
If the optional temperature sensor is connected to the charger, you can enter a cut-off temperature at which the charge or discharge process is automa-
tically halted. For LiXX batteries this temperature must be no higher than 55°C (default setting).
Maximum capacity MAX. CAPACITY
If you enter a value for maximum capacity, then the charge process is automatically halted when this capacity is reached. The default setting is 120%.
The effective life of the battery can be increased by reducing this value.
SAFETY TIMER
The safety timer halts the charge process after the set time. The adjustment range is OFF to 300 minutes; the factory default setting is 120 minutes.
Maximum charge rate CHARGE RATE
The maximum charge rate can be entered here; the default setting is 2C, i.e. if you enter 2200 mAh under battery capacity in the charge memory, the
charge current is automatically set to 4.4 A; you can reduce this value, but not increase it. If you wish to charge at a higher current, you must first increase
the C-rate; the maximum value is 5C.
Note: LiPo batteries should not be charged at rates higher than 2C. Many recent LiPo batteries permit higher rates - but only if explicitly stated on the
battery itself - although you should be aware that this always shortens the effective life of the battery.
The charge current can be set to any value in the range 0.1 to 20 A - taking the maximum charge power into account. Depending on the power supply,
the unit may be unable to charge at the selected current, i.e. the maximum possible current may not be used for charging. If this should occur, the screen
displays the charge current actually in use.
Capacity limit TCS CAPACITY
At Terminal Capacity Selection you can enter a capacity at which the charger responds in one of two ways: it simply generates a warning, but continues
to charge, or alternatively halts the charge process. LiXX batteries are charged using the constant current → constant voltage (CC-CV) method, i.e. the
Operating Manual ULTRA DUO PLUS 80
45