User manual

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b) Charging Batteries ("CHARGE")
The charging current to be set depends on the rechargeable battery's capacity and is usually 1C (also see chapter 7).
High-quality rechargeable batteries also can stand a charging current up to 2C. However, you should always observe
the battery manufacturer's instructions.
The value "1C" means that the charging current is equivalent to the battery's capacity. A charge current of
3 A therefore must be set for a 3000 mAh-NiMH battery at 1C.
A value of 0.5C means that the charging current corresponds to half the capacity value. At a NiMH re-
chargeable battery with a capacity of 3000 mAh, 0.5C means that a charging current of 1.5 A must be set.
In general: The smaller the rechargeable battery (the individual cell), the lower the maximum charging cur-
rent.
For example, conventional NiMH-mignon/AA-cells with a capacity of 2000 mAh permit a charging current
of 1C (this corresponds to a charging current of 2 A). For quick charging of such cells (contained, e.g., in
receiver batteries), never set more than 0.5C.
Charge a NiMH or NiCd battery as follows:
• First select the rechargeable battery type in the main menu, as
described in chapter 11. a) (NiMH or NiCd).
• Set the cell number in "CELLS" with the buttons "-" and "+".
• Push the button ">" in "MODE" repeatedly until the mode
"CHARGE" is displayed.
• For "CURRENT", use the buttons "-" and "+" to set the charge
current. Keep the respective button pressed for quick adjust-
ment.
• Another input window appears when you push the button
"MORE".
• Set the voltage where the delta-U charging procedure recog-
nises a fully charged rechargeable battery for "DELTA PEAK
SENSOR".
If the value is set too high, the charger may not recog-
nise that the rechargeable battery is fully charged. The
protection circuit for the charge duration or the maximum
capacity usually trips here (if set correctly).
If the value is set too low, the charge will switch off
too early and the rechargeable battery will not be fully
charged.
Change the voltage in steps and check the charging process. Due to the many different rechargeable bat-
teries, it is not possible to suggest a perfect value.
• In the setting "DISCHARGE END VOLT.", the cell voltage at which the discharge process is completed can be set.
• For "TRICKLE", you can set the maintenance charge current. When a NiMH or NiCd rechargeable battery is fully
charged, it will lose part of its capacity again by self-discharge. The maintenance charging current (short charging
impulses, no continuous charging current) ensures that the rechargeable battery remains fully charged. Thus also
prevents crystal formation in the rechargeable battery.
• "BACK" will take you back to the respective prior menu.