G.T POWER A8
BALANCE CHARGER/DISCHARGER
FOR NICD/NIMH/LITHIUM/PB BATTERIES
Operating Manual
Thank you for purchasing the G.T POWER A8 balance charger. This
is a rapid charge/discharger with built in balancer, computerised with
microprocessor and specialised operating software. Please read this
entire operating manual completely and attentively before using.
Contents
1.
Features
1
2.
Exterior of the unit
3
3.
Warnings and safety notes
4
4.
Program flow chart
6
5.
Initial Parameter set up (Users' set up)
7
9
6.
Lithium battery(Lilo/LiPo/LiFe)program
6.1
Charging Lithium Battery
9
6.2
Charging Lithium battery at balance mode
10
6.3
'FAST' charging Lithium battery
10
6.4
'STORAGE' control Lithium battery
11
6.5
Discharging Lithium battery
12
6.6
Voltage balancing and monitoring during the discharge
12
7.
NiMH/NiCd battery program
13
7.1
Charging NiCd/NiMH battery
13
7.2
Discharging NiCd/NiMH battery
13
7.3
Charge-to-discharge & discharge-to-charge cycle NiMH/NiCd battery
14
8.
Pb( lead-sulphuric acid) battery program
14
8.1
Charging Pb battery
14
8.2
Discharging Pb battery
15
9.
Save Data Program
15
10. Load Data Program
16
11. Various information during the process
17
12. Warning and error messages
18
13. Specifications
19
14. Warranty and service
19
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1. Features
Optimised operating software
When charging or discharging, A8 has an 'AUTO' function that sets the feeding current
automatically. Especially for Lithium batteries, it can prevent the over-charging can lead to
an explosion by users fault. Every program in the unit is controlled with mutual links and
communication for every possible error so it introduces a maximum safety. These can be set
at users option.
Special recharge plugsport for receiver, transmitter and igniter charger. And for
frequently used charger port such as multi purpose crocodile pin etc.
A8 provides most convenient balance charge port for Lithium batteries, with separated
3,4,5,6 7,8 charge port, and external reverse connector.
High-power and high-performance circuit
A8 employs the circuit that has maximum output power of 150W. As a result it can
charge or discharge up to 27 cells of NiCd/NiMH and 8 series of Lithium batteries with
maximum current of 7.0A. Furthermore the cooling system is so efficient that can hold such
a power without any trouble of running the CPU or the operating program.
Individual voltage bala ncer for Lithium batteries inside
A8 has an individual-cell-voltage balancer inside.This does not require any extra
balancer separately when charging Lithium batteries(Lilo/LiPO/LiFe) for cell voltage
balancing.
Balance individual cells on discharge
A8 also can monitor and balance individual cells of the Lithium battery pack during
the discharge process. If the voltage of any one cell varies abnormally, the process will be
stopped with the error message.
Accept various types of Lithium battery
A8 can accept three types of Lithium batterles- Lilo, LiPo and LiFe. They have different
characteristics by their chemistry. You can select any one of them that you are going to
process before the job. For their specifications, refer 'Warnings and safety notes' section.
Lithium battery 'Fast' and 'Storage' mode
You can charge Lithium battery for special purposes. 'Fast' charge reduces the charging
time of Lithium battery and 'Storage' mode controls the final voltage of the battery to be suit
for long time storage.
Maximum safety
Delta-peak sensitivity: The automatic charge termination program works on the principle
of the Delta-peak voltage detection.(NiCd/NiMH)
Auto-charge current limit: When charging NiCd or NiMH at 'AUTO' current mode, you
can set the upper limit of change current to avoid from high current charging. This is very
useful when charging the low impedance and small capacity NiMH battery in 'AUTO' mode.
Capacity limit: The changing capacity always calculated by multiple of the charging
current and time. If the charging capacity exceeds the limit the process will be terminated
automatically when you set the maximum value.
Temperature limit: The temperature of the battery on charging will rise by its internal
chemical reaction. If you set the limit of temperature the process will be expired forcibly
when the limit has reached.
-1-
Processing time limit: you can also restrain the maximum process time to prevent from
any possible defect.
Input power monitor: To protect the car battery using as input power from being
damaged the voltage of it always monitored. If it dorps below the lower limit the process will
be ended automatically.
Automatic cooling fan: The electric cooling fan comes into action automatically only
when the internal temperature of the unit is raised.
Data store/load
For users convenience it can store maximum 10 data of different batteries. You
can establish the data contains program setting of the battery to charge or discharge
continually. These data can be called out at any time you need and the process can
be executed without program setting.
Cyclic charging/discharging
Perform 1 to 5 cycles of charge>discharge or discharge>charge continually for battery
refreshing and balancing.
PC based analysis using USB communication
For technical expert, A8 offers PC based program can analyse the characteristic of the
battery by USB port. It shows a graph of voltage, current, capacity and temperatu re curves.
It also shows the individual voltage of each cell in the Lithium battery pack.
Multi-use wires
We provide you with 7 kinds of wires for you to choose, so you can charge and
discharge your battries more conveniently.
multifunctional extension wire
i gniter wire
T plug wire
receiver wire
JST wire
crocodile clips wire
Temperature sensor wire
*When using the thermal probe
**A8 comes with the program kit(CD plus PC link cable)
-2-
USB wire
2. Exterior of the unit
Charging lead
Connector
(4mm banana female)
LCD screen
(16chr.x2lines)
USB
port
Input power cable
(DC 11V~18V)
Individual cell
Connector port
Temperature
sensor port
Batt type/stop
To select
main program
To stop
the operation
Dec/Inc
To select
sub program
To alter
the value
Start/Enter
To resume
or start
the operation
2.1 Lithium balance charge program connection diagram
WARNING
It will damage the charger if you connect your battery with the A8 charger incorrectly. Please
connect as shown in the following diagram carefully.
-3-
3. Warnings and safety notes
• Never leave the charge unsupervised when it is connected to its power supply. If any
malfunction is observed immediately terminate the process and refer to the operation manual.
• Keep away the unit from dust, damp, rain, heat direct sunshine and vibration. Do not dorp it.
• The circuit of the unit is designed to be powered by a 10-18V DC only.
• This unit and the battery to charge or discharge should be set up on a head-resistant, noninflammable and non-conductive surface. Never place them on a car seat, carpet or similar.
Keep all the inflammable volatile materials well away from operating area.
• Be sure to understand the information of the battery to be charged or discharged accurately.
If the program is set up incorrectly the battery can severely be damaged. Especially Lithium
NiCd/NiMH
voltage level:1.2V/cell
allowable fast charge current:1C~2C depends on the
performance of cell discharge voltage cut off level
0.85V/cell(NiCd), 1.0V/cell(NiMH)
Lilo
voltage level:3.6V/cell
max.charge voltage:4.1V/cell
allowable fast charge current: 1C or less
min.discharge voltage cut off level:2.5V/cell or higher
LiPo
voltage level:3.7V/cell
max.charge voltage:4.2V/cell
allowable fast charge current: 1C or less
discharge voltage cut off level:3.0V/cell or higher
Life
voltage level:3.3V/cell
max.charge voltage:3.6V/cell
allowable fast charge current: 4C or less(e.g. A123M1)
discharge voltage cut off level:2.0V/cell or higher
Pb
voltage level:2.0V/cell
(Lead-acid) max.charge voltage:2.46V/cell
allowable fast charge current:0.4C or less
discharge voltage cut off level:1.50V/cell or higher
battery can cause a fire or an explosion by over-charging.
• To avoid short-circuits between the charge lead, always connect the charge cable to the unit
first and only then to the battery to be charged or discharged. Reverse the hsequence when
disconnecting.
• Do not connect more than one battery pack to the charge lead at any one time.
• Do not attempt to charge or discharge the following types of battery.
• Battery pack, which consists of different types of cell (including different manufacturers).
• Battery, which is already fully charged or just slightly discharged.
• Non-rechargeable batteries(Explosion hazard).
• Batteries that require a different charge technique from NiCd, NiMH, Lilo, LiPo, LiFe or Pb.
• Faulty or damaged battery.
• Battery fitted with an integral charge circuit or a protection circuit.
• Batteries installed in a device, or which are electrically linked to other components.
• Batteries that are not expressly stated by the manufacturer to be suitable for the currents the
charger delivers during the charge process.
•
•
Please bear in mind of checking the following point before charge operation.
Did you select the appropriate program, which are suitable for the type of battery?
-4-
• Did you set up adequate current for charging or discharging?
• Lithium battery pack can be composed with parallel and series circuits mixed. You have to
check the composition of the battery pack carefully before charging.
• Are all connections firm and safe, or is there an intermittent contact at any point in the circuit?
Charging
• A specific quantity of electrical energy is fed into the battery during charge process. The
charge quantity is calculated by multiplying charge current by charge time. The maximum
permissible charge current varies according to the battery type or its performance, and can
be found in the information provided by the battery manufacturer. It is only allowed to charge
batteries at rates higher than the standard charge current if they are expressly stated to be
capable of quick-charge.
• Connect the battery to charge to output terminal of the charger using suitable charge lead.
They are red, positive(+)and black, negative(-).Since the charger cannot detect the difference
between the internal resistance of the battery pack, cable resistance and connector transfer
resistance, the first requirement if the charger to work properly is that the charge lead should be
of adequate conductor cross-section. And also high-quality connectors (normally gold-contact
type) must be fitted to both ends.
-Refer to the information provided by the battery manufacturer regarding charging methods, and
verify the recommended charge current and charge time.Especially for Lithium batteries, you
have to follow the charge instruction provided by the manufacturer strictly.
• Do not attempt to disassemble the battery pack arbitrarily.
You have to pay attention to verify the capacity and the voltage of the Lithium battery pack. It may
be composed of parallel and series connection mixed. In parallel link the capacity of the battery
pack is multiplied by the number of cells but the voltage remains same. That kind of voltage
imbalance causes a fire or explosion during charge process. We recommend you compose the
Lithium battery pack in series only.
Discharge
• The typical purpose of discharge is to determine the residual capacity of the battery, or to
lower the voltage of battery to a defined level. When you discharge the battery you also have to
pay attention on the process same as charging. To avoid the battery becoming deep-discharged,
set the final discharge voltage correctly. Lithium batteries should not be deep-discharged to
lower than the minimum voltage, as this leads to a rapid loss of capacity or a total failure.
Generally, you do not need to discharge Lithium battery voluntarily.
• Some rechargeable batteries are said to have a memory effect. If they are partly used and
recharged before the whole charge is drawn out, they‘remember’ this and next time will only
use that part of their capacity. This is a ‘memory effect’. NiCd and NiMH batteries are said to
suffer from memory effect. They prefer complete cycles; fully charge then use until empty, do not
recharge before storage-allow them to self-discharge during storage. NiMH batteries have less
memory effect than NiCd.
• The Lithium battery prefers a partial rather than a full discharge. Frequent full discharges
should be avoided if possible. Instead, charge the battery more often or use a larger battery.
• The brand-new NiCd battery pack is partially useful with its capacity until it has beeen
subjected to 10 or more charge cycles in any case. The cyclic process of charge and discharge
will lead to optimise the capacity of battery pack.
Those warnings and safety notes are particularly important. Please follow the
instructions for a maximum safety; otherwise the charger and the battery can
be damaged violently. And also it can cause a fire to injure a human body or
to lose the property.
-5-
4. Program flow chart
PROGRAM SELECT
LIXX BATT
Start
Enter
LIXX CHARGE
INC
DEC
LIXX BALANCE
INC
DEC
LIXX FAST CHG
INC
DEC
LIXX STORAGE
INC
Batt type
stop
PROGRAM SELECT
NiMH BATT
DEC
LIXX DISCHARGE
Start
Enter
NiMH CHARGE
'Aut' / 'Man'
INC
N icd CHARGE
INC
NiMH DISCHARGE
DEC
INC
DEC
NiMH CYCLE
Batt type
stop
PROGRAM SELECT
Nicd BATT
Start
Enter
'Aut' / 'Man'
Nicd DISCHARGE
DEC
INC
DEC
Nicd CYCLE
Batt type
stop
PROGRAM SELECT
Pb BATT
Start
Enter
Pb CHARGE
INC
Pb DISCHARGE
DEC
Batt type
stop
PROGRAM SELECT
SAVE DATA
Start
Enter
SAVE DATA
Batt type
stop
PROGRAM SELECT
LOAD DATA
Start
Enter
LOAD DATA
Batt type
stop
USER SET
PROGRAM
Start
Enter
LIXX V. Type
INC
DEC
Lilo / LiPo / LiFe
CHK Time
INC
DEC
NiMH Sensitivity
D. Peak
INC
DEC
Nicd Sensitivity
D. Peak
INC
Safety Timer
INC
INC
DEC
NiMH/Nicd/Pb
Trickle
INC
Key Beep
Buzzer
INC
DEC
Waste Time
CHG>DCHG
INC
Input Power
Low Cut-Off
INC
DEC
DEC
Temp Cut-Off
USB Enable
DEC
Capacity Cut-Off
INC
DEC
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DEC
DEC
Back-Light
5. Initial Parameter set up (Users' set up)
A8 will be operated with the default value of the essential user settings
when it is connected to a 12V batttery for the first time.The screen displays
the following information in sequence and the user can change the value of
parameter on each screen.
When you are willing to alter the parameter value in the program, press Start/
Enter key to make it blink then change the value with INC or DEC key. The value will
be stored by pressing Start/Enter key once.
USER SET
PROGRAM
User setup starting screen.
The screen displays the nominal voltage of Lithium
battery. There are three kinds of Lithium battery;
LiFe(3.3V),Lilo(3.6V) or LiPo(3.7V). This is very
important so you have to check the battery carefully
and set it up correctly. If it is different from correct
value the battery can explode during charge process.
A8 recognise the cell count of Lithium battery
automatically at the beginning of charge or discharge
process to avoid from erroneous setting by user. But
deeply discharged battery can be perceived incorrectly.
To prevent the error, you can set the time term to verify
the cell count by the processor. Normally, 10 minutes
are enough to perceive the cell count correctly. For
the battery of larger capacity, you may extend the
time term. But if you set the time term too long for the
battery of smaller capacity, the charge or discharge
process can be finished within the time term with the
erroneous cell count. This may cause the fatal result.
If the processor recognises the cell count incorrectly at
the beginning of charge or discharge process, you may
extend the time. Otherwise, you had better use with
the default value.
-7-
This shows the trigger voltage for automatic charge
termination of NiMH and NiCd battery. The effective
value ranges from 5 to 20mV per cell .if the trigger
voltage is set higher, there is a danger of overcharging
the battery; if it is set lower, there is a possibility of
premature termination. Please refer the technical
specification of the battery.(NiCd default:12mV, NiMH
default:7mV)
An optional feature using temperature probe contacting
the surface of battery, the temperature cut-off can be
on or off. If it is on, set the maximum temperature at
which the charger should allow battery to reach during
charge, Once a battery reaches this temperature
during charge, the process will be terminated to protect
the battery.
The battery is on the cyclic process of charge and
discharge can often become warm after charge or
discharge period. The program can insert a time delay
to occur after each charge and discharge process to
allow the battery adequate time to cool down before
being subjected to the next process. The value ranges
from 1 to 60 minutes.
You can set the trickle charge mode on or off.If it is on,
the charge will automatically supply the trickle charge
current to achieve the full charge without overheating
the battery after fast charge has been terminated.
When you start a charge process, the integral safety
timer automatically starts running at the same time.
This is programmed to prevent overcharge the battery
if it proves to be faulty, or if the termination circuit
cannot detect the battery full. The value for the safety
timer should be generous enough to allow a full charge
of the battery .
-8-
This program sets the maximum charge capacity that
will be supplied to the battery during charge. If the
delta-pack voltage is not detected nor the safety timer
expired by any reason, this feature will automatically
stop the process at the selected capacity value.
The beep sounds at every time pressing the buttons to
confirm your action. The beep or melody sounded at
various times during operation to alert different mode
changes. These audible sounds can be on or off.
This program monitors the voltage of input battery. If
the voltage drops below the value you set the operation
forcibly terminated to protect the input battery.
You can adjust the brightness of LCD screen at the
charger.
6. Lithium battery(Lilo/LiPo/LiFe)program
These programs are only suitable for charging and discharging Lithium batteries
with a nominal voltage of 3.3V, 3.6V and 3.7V per cell. These batteries need to
adopt different charge technique is termed a constant voltage(CV) and constant
current(CC) method. The charge current varies according to the battery capacity and
performance. The final voltage of charge process is also very important; it should be
precisely matched with the charade voltage of the battery. They are 4.2V for LiPo, 4.1V
for Lilo, and 3.6 V for LiFe. The charge current and nominal voltage as for cell count
set on the charge program must always be correct for the battery to be charged.
When you are willing to alter the parameter value in the program, press Start/
Enter key to make it blink then change the value with INC or DEC key. The value will
be stored by pressing Start/Enter key once.
6.1 Charging Lithium Battery
-9-
The left side of the first line shows the type of battery you
select at the users setting. The value on the left side of
second line sets a charge current and the value on the right
side of second line sets the voltage of the battery pack.
After setting the current and voltage press Start/Enter
key for more than 3 seconds to start the process.
(Charge current:0.1~7.0A,Voltage:1~8 series)
This shows the number of cells you set up and the
processor detects. ' R:' shows the number of cells
found by the charger and ' S:' is the number of
cells selected by you at the previous screen. If both
numbers are identical you can start charging by press
Start/Enter button. If not, press Batt Type/Stop button
to go back to previous screen. Then carefully check
the number of cells of the battery pack to charge again.
The screen shows the present situation during charge
process. To stop charging press Batt Type/Stop key
once.
6.2 Charging Lithium battery at balance mode
This is for balancing the voltages of Lithium batteries of the battery park to be
charged. The battery pack to be charged should be connected to the suitable balance
port at the right side of the charger. And also, you need to connect the battery output
plug to the output of charger.
In this mode, the charging process will be different from ordinary charging mode.
The internal processor of the charger will monitor the voltages of each cell of the
battery pack and controls charging current that is feeding to each cell to normalise
the voltage.
The value on the left side of second line sets a charge
Balance
current and the value on the right side of second line
sets the voltage of the battery pack.
After setting the current and voltage press Start/ Enter
key for more than 3 seconds to start the process.
(Charge current:0.1~7.0A, Volatge:1~8 series)
This shows the number of cells you set up and the
processor detects.' R: ' shows the number of cells found
by the charger and ' S:' is the number of cells selected
by you at the previous screen. If both numbers are
identical you can start charging by press Start /Enter
button. If not, press Batt type/Stop button to go back
to previous screen. Then carefully check the number of
cells of the battery pack to charge again.
- 10 -
This screen shows the present situation during charge
process. To stop charging press Batt type/Stop key
once.
6.3 'FAST' charging Lithium battery
The charging current is getting smaller as the process goes to the near end term
of Lithium battery chaging. To finish charging process earlier, this program eliminate
certain term of CV process. Actually, the charging current will goes to 1/5 from the
initial value to end the process while the normal chaging goes to 1/10 during CV term.
The charging capacity may be a bit smaller than normal charging but the process
time will be reduced.
You can set up the charging current and the voltage
of the battery pack being charged. As you press Start/
Enter button the voltage confirmation will be displayed.
And then, if you confirm the voltage and current, press
Start/ Enter button again to start charging.
This shows the present state of 'FAST' charging. To
stop charging arbitrary, press Batt type/Stop key
once.
6.4 'STORAGE' control Lithium battery
This is for charging or discharging Lithium battery not to be used for the time
being. The program will determine to charge or discharge the battery to the certain
voltage depending on the voltage of the battery at its initial stage. They are different
from the type of the battery, 3.75V for Lilo, 3.85V for LiPo and 3.3V for LiFe per cell.
If the voltage of battery at its initial stage is over the voltage level to storage, the
program will start to discharge.
You can set up the current and the voltage of the
battery pack to be charged. The current will be used for
charge or discharge the battery to reach the ' storage '
level of voltage.
This screen shows the present situation during charge
process. To stop charging press Batt type/Stop key
once.
- 11 -
6.5 Discharging Lithium battery
The value of discharge current on the left side of
screen may not exceed 1C for a maximum safety
and the final voltage on the right should not be under
the voltage level that is recommended by the battery
manufacturer to avoid deep discharging.
To start to discharge, press Start/ Enter key for more
than 3 seconds. (Discharge current:0.1~5.0A)
This shows the present state of discharge. To stop
discharging press Batt type/Stop key once.
6.6 Voltage balancing and monitoring during the discharge
The processor monitors the voltage of individual cells during 'storage-mode' and
'discharge' of Lithium battery pack. It tries to normalise the voltages to be equal.
For this feature, the individual plug of the battry pack should be connected to the
individual port of the charger.
If the voltage of any one or more cells varies abnormally during the procedure,
It terminates the process forcibly with the error massage. If this happens, the
battery pack contains the bad cell, or the bad connection of the cable plug. You
can easily know which one cell is bad by pressing INC button at time of showing
the error message.
The processor found that the voltage of one of the cell
in the Lithium battery pack is too low.
In this case, the 4th cell is bad. If there happens the
connection-break of th cable or plug, the voltage value
may show zero.
- 12 -
7. NiMH/NiCd battery program
These programs are for charging or discharging NiMH (Nickel-Metal-Hydride) or
NiCd (Nickel-Cadmium) battery commonly used for R/C model aplications. To alter
the value at the display, press Start/Enter key to make it blink then change the value
using INC or DEC key.The value will be stored by pressing Start/Enter key once.
To start the process, press Start/ Enter button for more than 3 seconds.
7.1 Charging NiCd/NiMH battery
This program simply charge the battery using the
current you set. In 'Aut' mode, you need to set the
upper limit of charge current to avoid from higher
feeding current that may damage the battery. Because
some batteries of low impedance and small capacity
can lead to the higher charge current by the processor
at automatic charge mode. But in 'Man' mode, it will
charge the battery with the charge current you set at
the display. Each mode can be switched by pressing
INC and DEC button simultaneously when the current
field is blinking.
The screen displays the current state of charging . To
stop the process, press Batt type/Stop key once.
The audible sound indicates you the end of process.
7.2 Discharging NiCd/NiMH battery
Set discharge current on the left and final voltage on
the right. The discharge current ranges from 0.1 to
5.0A and the final voltage ranges from 0.1 to 30.0V). To
start the process, press Start /Enter key more than 3
seconds.
The screen displays the current state of discharge. You
can alter the discharge current by pressing Start/Enter
key during the process. Once you change the current
value, store it by pressing Start/Enter button again.
To stop discharging press Batt type/Stop key once.
The audible sound indicated you at the end of process.
- 13 -
7.3 Charge-to-discharge & discharge-to-charge cycle NiMH/NiCd battery
Set the sequence on the left and the number of cycle
on the right. You can use this function for balancing,
refreshing and break-in the battery. To avoid rising
temperture of the battery, there will a brief cool-off
period that already fixed at 'User setting' after each
charge and discharge process. The cycling number
ranges from 1 to 5.
To stop the process, press Batt type/Stop key once.
You can change the discharge or charge current by
pressing Start/Enter key once during the process. The
audible sound indicates you the end of process.
At the end of the process, you can see charged or
discharged electric capacities of the battery at each
cyclic process.
By pressing INC or DEC button, the screen shows the
result of each cycle in order.
8. Pb( lead-sulphuric acid) battery program
This is programmed for charging Pb( lead-sulphuric acid) battery with nominal
voltage from 2 to 36V. Pb batteries are totally different from NiCd or NiMH batteries.
They can only deliver relatievely lower current compare to their capacity, and similar
restrictions definitely apply to charge. So the optimal charge current will be 1/10 of
the capacity. Pb batteries must not be charged rapidly. Always follow the instruction is
supplied by the manufacturer of battery.
When you are willing to alter the parameter value in the program, press Start/
Enter key to make it blink then change the value with INC or DEC key. The value will
be stored by pressing Start/Enter key once.
8.1 Charging Pb battery
Set up the charge current on the left and the nominal
voltage of the battery on the right. The charge current
ranges from 0.1 to 7.0A and the voltage should be
matched with the battery being charged.
Start the charge process by pressing Start/Enter key
for more than 3 seconds.
- 14 -
The screen displays the state of charging process. To
stop charging forcibly, press Batt type/Stop key once.
The audible sound indicates you at the end of process.
8.2 Discharging Pb battery
Set discharge current on the left and final voltage on
the right. The discharge current ranges from 0.1 to
5.0A.
To start the process, press Start/Enter key for more
than 3 seconds.
The screen displays the current state of discharge. You
can alter the discharge current by pressing Start/Enter
key during the process. Once you change the current
value, store it by pressing Start/Enter button again.
To stop discharging press Batt Type/Stop key once.
The audible sound indicates you at the end of process.
9. Save Data Program
A8 has a data storage and load program for your convenience. This feature can
store up to 10 battery data by number that represent the individual specification
of batteries you are using. They can be called back for the process of charging or
discharging without setting up the program again. To set up the parameter value in
the program, press Start/Enter key to make it blink then change the value with INC
or DEC key.
Program select.
The parameter valaue setting up in this screen
does not affect charge or discharge process. They
only represent the specification of the battery. The
following screens will automatically be displayed
exactly matched battery type you set up. The
example shows the battery pack of NiMH, 12cells and
3000mAh of capacity.
- 15 -
Set up the charge current for manual charge mode, or
the current limit for automatic charge mode. Each mode
can be switched by pressing INC and DEC button at
the same time when the current field is blinking.
Setting up discharge current and final voltage.
Setting up the sequence of charge and discharge, and
the cycling number.
Saving the data.
10. Load Data Program
This program calls back the data that was stored at 'Save Data' program.
To load the data, press Start/Enter key once to blink the data number field
and select the number using INC or DEC key then press Start /Enter key for
more than 3 seconds.
Program select.
Select the data number to be called back.
The data matched with the number will be displayed at
this time.
Loading the data.
- 16 -
11. Various information during the process
You can inquire various information on LCD screen during charging or discharging
process. When you press DEC button the charger shows the establishment of user
settings. And also you can monitor the voltage of individual cell by pressing INC
button when the individual connection cable is linked to the Lithium battery being
processed.
It comes to the final voltage when the program ended.
Displayed capacity cut-off function is turn on and the
setting value of capacity.
Displayed safety timer is turn on and duration of time
in minutes.
Displayde temperature cut-off function is turn on.
The internal temperature of the charger ang the
temperature of battery being charged.
(The external temperature only will be displayed when
using the thermal probe.)
The present voltage of input DC power.
Using the individual connection cable to the battery,
you can check the individual voltage of each cell in the
battery pack. When connect the cable to the port on
the right side of the charger the program shows the
voltage of each cells for maximum 8 cells in sequence.
To utilise this feature, the battery pack must have
output connector that linked to each cells.
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12. Warning and error messages
A8 incorporates a various functions of protective and monitoring the system to
verify functions and the state of its electronics. In any case of occurring error, the
screen displays the cause of error that is self- explanatory with audible sound.
The output is connected to a battery with incorrect
polarity.
This will be displayed in case of detecting an
interruption of the connection between battery and
output or voluntarily disconnecting the charge lead
during the operation of charge or discharge on output.
There was a short-circuit at OUTPUT. Please check
the charging leads.
The voltage of input power drops below the limit.
The voltage of Lithium battery pack was selected
incorrectly. Verify the voltage of battery pack carefully.
There happens the malfunction at the charger circuit
by any reason .
The processor detects the voltage is lower than you
set at Lithium program. Please check the cell count of
the battery pack.
The processor detects the voltage is higher than you
set at Lithium program. Please check the cell count of
the battery pack.
The voltage of one of the cell in the Lithium battery
pack is too low. Please check the voltage of the cell
one by one.
The voltage of one of the cell in the Lithlum battery
pack is too high. Please check the voltage of the cell
one by one.
There are bad connection at the individual connector.
Please check the connector and cables carefully.
The internal temperature of the unit goes too high.
Cool down the unit.
The processor can not continue to control the feeding
current by any reason. The unit needs to be repaired.
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13. Specifications
Operating voltage range:
Circuit power:
Charge current range:
Discharge current range:
Current drain for balancing Li-po:
NiCd/ NiMH battery cell count:
Lithium battery cell count:
Pb battery voltage:
Weight:
Dimension:
10.0~18.0Volt
max.150W for charging
max.25W for discharging
0.1~7.0A
0.1~5.0A
300mAh/cell
1~27cells
1~8Series
2 to 36V
700g
165×130×45mm
14. Warranty and service
We warrant this product for a period of one year(12 months) from the date of
purchase. The guarantee applies only to such material or operational defects, which
are present at the time of purchasing the product. During that period, we will replace
without service charge any product deemed defective due to those causes. You will
be required to present proof of purchase (invoice or receipt). This warranty does
not cover the damage due to wear, overloading, incompetetent handling or using of
incorrect accessories.
Note:
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Note:
G.T POWER A8
BALANCE CHARGER/DISCHARGER
FOR NICD/NIMH/LITHIUM/PB BATTERIES
RoHs