GRAUPNER ULTRAMAT 18 Operating Manual page 34

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i M H m a n u a l
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C : 2 . 5 A
+
-
INC DEC
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N i M H d i s c h a r g e
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
1 . 0 0 A
+ -
INC DEC
ENTER
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i M H c y c l e
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C : 2 . 5 A D : 1 . 0 0 A
+
-
DEC
INC
ENTER
34
Ni-MH manual program
Select this program when you simply wish to recharge a
battery using the set charge current. You can adjust the
charge current using the INC / DEC buttons, but only
before you connect the pack for charging. The range
available is 0.1 A to 20.0 A.
Never use a maximum charge current higher as the value
described in the battery instruction, never higher as 2C!
Never charge transmitter batteries with more as 2A!
f. e. a 4.2Ah battery should be limited to max. 4.2A.
The charge process is terminated automatically in
accordance with the values already set for „Ni-MH Delta
Peak cut-off voltage".
Ni-MH discharge program
The typical purpose of this program is to determine the
residual capacity of a transmitter, receiver or drive battery,
or to discharge the pack to a defined level.
4 . 8 V
In this program the charger discharges the pack using the
+ -
set discharge current (0.1 ... 5.0 A, left of screen) until its
DEC
INC
voltage falls to the set final discharge voltage (0.1 ... 36.0 V,
right of screen).
The set final discharge voltage should be a value of around
1.0 ... 1.2 V per cell, in order to avoid the pack becoming
deep-discharged. Deep-discharging a pack runs the risk of
reversing individual cells, i.e. they exhibit reversed polarity.
Ni-MH conditioning program
This program is designed to optimise the capacity of a
ENTER
battery, and balance the state of its cells.
At top right you can use the INC or DEC button to determine
INC INC
whether the conditioning program is to start with a charge or
or
discharge cycle. After this you set the number of cycles
DEC DEC
from 1 to 5 (e.g., if you set three cycles, the pack will be
charged and discharged three times). The program dis-
charges the battery using the set discharge current stated
C > D 1
on the right of the screen (0.1 ... 5.0 A), and then recharges
it using the charge current (0.1 ... 20.0 A) shown on the left
of the screen. The charge process is terminated
+
-
automatically in accordance with the values already set for
INC
DEC
„Ni-MH Delta Peak cut-off voltage". The discharge cut-off
voltage is set in the Ni-MH discharge program. The method
of reading out the values for the actual cycle is described in
the section „Screen displays".