Pb Discharge Program; User Settings - GRAUPNER ULTRA DUO PLUS 30 Bedienungsanleitung

The screen displays the message "MAX.", alternating with the reduced charge current to indicate that the
charger is limiting the current.
The ULTRA DUO PLUS 30 now charges the battery using the maximum possible current until its voltage
rises to around 2.3 to 2.35 Volts per cell. The charger then switches to a lower current to bring the battery
gently up to full charge; this process reliably fills the battery "to the brim".
The unit cuts off the charge process automatically when the battery reaches a voltage of around 2.45 to
2.5 Volts per cell. The effect of the automatic charge current adjustment system is to complete a full charge
safely in much less than the usual 14 to 16 hours.
In the final stage the charger automatically continues to charge
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
P b - M a n . 2 2 6 : 1 3
the battery at the current set in the menu "Pb - trickle charge
* T * _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 0 3 6 2 7 7 . 2 1
current" until you disconnect it from the charger. During this
period the screen displays the letter "T" instead of the charge
current to indicate that it is trickle charging.

Pb discharge program

The typical purpose of this program is to determine the residual
P b _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ d i s c h a r g e
capacity of a drive battery.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ In this program the charger discharges the pack using the set
2 . 5 A 1 0 . 8 V
discharge current (0.1 ... 5.0 A or automatic) until its voltage falls
+ - + -
to the set final discharge voltage (0.5 ... 37.0 V or automatic).
INC DEC INC DEC
To obtain a realistic capacity reading, i.e. one which actually
reflects the battery's condition, the discharge current should be
ENTER
set substantially below 1C (capacity of the battery = 2 Ah —> C
= 2 A), and the final discharge voltage should be set to around
1.55 V per cell.
Pb capacity test program
This program determines the capacity of a lead-acid battery.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ P b c a p a c i t y
The program first charges the battery using the set charge cur-
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ rent stated on the left of the screen (0.1 ... 7.0 A), and then
C : 2 . 5 A D : 2 . 5 A
discharges it again using the set discharge current stated on
+ +
- -
the right of the screen (0.1 ... 5.0 A). At the end of the process
INC DEC INC DEC
the screen displays the battery's capacity.
The recharge phase exploits the unit's ability to select and redu-
ENTER
ce the charge and discharge current and voltage automatically,
as described previously for the Pb manual program.
During the discharge phase the battery is discharged at the
current you have selected. To obtain a realistic capacity reading
the discharge current should not be above 1C (capacity of the
battery = 2 Ah —> C = 2 A).
Lead-acid batteries exhibit slightly lower charging efficiency than
NiCd or NiMH batteries, so you should not be surprised if the
useful capacity of the battery only amounts to 60 to 70% of the
charged-in capacity.
Pb trickle charge current
When a Pb charge program is used and the battery reaches the
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
P b t r i c k l e c h g .
final charge voltage, the charger automatically switches to mainte-
c u r r e n t _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 0 0 m A
nance mode, i.e. trickle charging.
In trickle mode the charger automatically reduces the final char-
+ -
ge voltage to around 2.2 to 2.3 V per cell, which effectively
INC DEC
prevents excessive gassing of the battery even if it is left on
charge for a fairly long time.
This menu is purely for setting the trickle charge rate, and has no other independent function.
36

13. User settings

NiCd -
Initial-
User MODE MODE
∆ ∆ ∆ ∆ ∆ Peak
program
settings
NiCd
- 10 mV
NiMH
.
Lithium
.
Pb
- 30 mV
Button click
Erase MODE
- OFF
user
MODE
- ON
settings
Summer
- OFF - 10 sec.
**erased**
- no limit
Initial power-on program
You can select the charge program which is to be activated
p o w e r - o n _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ p r o g r a m
automatically when the charger is connected to the car batte-
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i C d a u t o m a t i c
ry. The following charge programs are available: NiCd-
manual, -automatic, NiMH-manual, -automatic, LiIo manual
+ -
and Pb-manual, -automatic.
INC DEC
NiCd delta-peak (-∆ ∆ ∆ ∆ ∆ peak) trigger voltage
The automatic charge termination cir-
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i C d d e l t a - p e a k -
cuit ("battery full" detection) works on
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
v o l t a g e = 2 0 m V
the principle of the Delta Peak process;
this method, sometimes known as the
+ -
Delta-U or Delta-V process, has pro-
INC DEC
ved its worth in millions of battery chargers over many years.
The charger monitors the charge curve and assesses the
peak, or maximum point, on the curve. This indicates extremely accurately when the battery is fully
charged.
When a battery is placed on charge, its voltage initially rises continuously; however, when the battery
is full the cells' temperature rises, and this causes a slight reduction (DV) in the battery voltage. The
charger detects and measures this drop. It is possible to adjust the sensitivity, or trigger voltage (in
mV per cell!) of the automatic termination circuit for NiCd batteries. A practical range has proved to be
10 ... 30 mV / cell. If the trigger voltage is set higher, there is a danger of overcharging the battery; if set
lower, there is a danger of premature termination. We recommend that you carry out a series of test
charges to establish the ideal trigger value for your batteries.
NiMH delta-peak (-∆ ∆ ∆ ∆ ∆ peak) trigger voltage
It is possible to adjust the trigger voltage (in mV per cell!) of
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
N i M H d e l t a - p e a k -
the automatic termination circuit for NiMH batteries. Howe-
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
v o l t a g e = 1 5 m V
ver, compared with NiCd cells NiMH batteries have a less
pronounced voltage drop, and a practical range has proved
+ -
to be 5 ... 25 mV / cell. If the trigger voltage is set higher, there
INC DEC
is a danger of overcharging the battery; if set lower, there is a
danger of premature termination. We recommend that you
carry out a series of test charges to establish the ideal trigger
value for your batteries.
NiMH -
NiCd / NiMH NiCd / NiMH
MODE MODE MODE
∆ ∆ ∆ ∆ ∆ Peak
charge termin- safety
delay timer
- 5 mV
.
AUS,
.
10 ... 300 min.
- 25 mV
0...9 min.
Initial
max.
Car battery
MODE MODE MODE
curre nt
current
cut-off
NiCd 0,1... 7A
NiMH 0,1... 7A
NiCd 0,1... 7A
- 10,5 Volt
Lith. 0,1... 9,9A
NiMH 0,1... 7A
- 11.8 Volt
Pb 0,1... 7A
Pb 0,1... 7A
Akku2 0,05..,0,5A
oder Automatik-Strom
MODE
charging time
37