38
NiCd-Delta-Peak (-
Peak) trigger voltage
This in turn causes the battery voltage to fall slightly (Delta-V). The charger detects and assesses the
voltage decline.It is possible to adjust the sensitivity, or trigger voltage (in mV
per
cell!) of the automatic
cut-off circuit for Ni-Cd batteries. A practical range of values has proved to be 10 … 30 mV / cell. Higher
voltages often lead to overcharging of the battery, whereas a lower voltage tends to result in premature
termination of the charge process. We recommend that you check the information supplied by your
battery manufacturer, then carry out a series of test charges to establish the optimum value for your
battery. Start with 10mV/cell to avaid overcharging the battery.
The automatic charge termination circuit
(battery full detection) works on the proven
Delta Peak principle (also known as the
Delta-V process), which is already in use
in millions of chargers.
This process analyses the voltage peak of
the charge curve, which indicates with great accuracy when the
maximum charge capacity is reached.When the charge process
is started the battery voltage initially rises continuously, but as
the pack approaches full capacity it begins to heat up.
12. NIMh-programs (Output 1)
A set of convenient charge programs for recharging
Ni
ckel-
M
etal-
H
ydride batteries, as commonly used
for modelling purposes. When the charge / discharge program is fi nished, the screen displays the name
of the charge program alternating with the message „END“, together with the charge time, the last
(dis-) charge current, the charged-in (discharged) capacity and the battery voltage, and continues to
do so until you disconnect the battery. This information can often give you a useful indication about the
Ni-MH pack’s charge characteristics and capacity, or warn you if the charger has incorrectly assessed
the pack as being „full“.
NiMh automatic program
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i M h - A u t o < 2 . 5 A
DEC
INC
+
-
In this program the charger detects the type of Ni-MH battery
connected to it, and adjusts the charge current accordingly to
avoid overcharging the pack.
The maximum charge current can be set
before
you connect
the battery to be charged.
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 2 A! f. e. a 4.2
Ah battery should be limited to max. 4.2 A.
This is done using the INC / DEC buttons; the range available
is 0.1 A to 10 A.
The charge process is terminated auto-matically in accordance
with the values already set for „Ni-MH Delta Peak cut-off
voltage“.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i C d d V = 1 0 m V / C
DEC
INC
+
-
cell v
oltage
charging time
NiMH
AUTOMATIC-
program
NiMH
cycle
program
NiMH
MANUAL-
program
NiMH
discharge
program
NiMH
delta-peak
trigger voltage
MODE
MODE
MODE
MODE
MODE
MODE
(2 sek.)
MODE
NiMH
discharge balancing
program
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i C d d e l t a - p e a k -
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i M h a u t o m a t i c
2 sec.
2 sec.
