Operation Manual
25
NiCd-Delta-Peak (-
∆∆
∆∆
∆ Peak)
trigger voltage
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. 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.
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.
12. NIMH-programs
A set of convenient charge programs for recharging Nickel-Metal-Hydride batteries, as
commonly used for modelling purposes. When the charge / discharge program is finished, 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
NiMH
balance
program
NiMH
MANUAL-
program
NiMH
discharge
program
NiCd
∆ ∆
∆ ∆
∆
delta-peak
trigger voltage
MODE MODE MODE MODE MODE
Ni-MH manual program
________________
________________NiMH manual
C:2.5A
DECINC
+
-
Ni-MH automatic program
________________
________________ NiMH automatic
C:2.5A limited
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. This is done using the
INC / DEC buttons; the range available is 0.1 A to 8 A, or
no restriction. The charge process is terminated auto-
matically in accordance with the values already set for
„Ni-MH Delta Peak cut-off voltage“.
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 8 A.The charge process is terminated
automatically in accordance with the values already set
for „Ni-MH Delta Peak cut-off voltage“.
________________
________________NiCd delta-peak-
volt =10mV/cell
DECINC
+
-
cell voltage
charging time