BCS DOUBLE
Owners Manual
2002.1.15
Owner’s Manual
Main Features
NiMH & NiCd Battery Compatible Charger x2
Input Voltage
................................. DC12V
Battery Voltage (cells)
........................ 1.2 ~ 14.4v
( 1 ~ 12 cells )
Battery Capacity
....... 270 ~ 6000mAh
Charge Amperage
....................... 0.3 ~ 9.9A
LCD Display Modes
..................... Voltage
.............. Amperage
.................. Capacity
........................... Temp
Charge Modes
......... Yokomo Charge
............... Peak Charge
............... Temp Charge
Built-in Cooling Fan
Specications Basic Operation Charging Q & A
Customer Support
Precautions
2
Specications
★Compatible with both NiMh(Nickel Metal Hydride) and NiCd(Nickel Cadnium) batteries.
★Two separate charge circuits installed. Capable of charging two batteries using separate
charge mode settings.
★In addition to the newly developed Yokomo Charge Mode (for maximum battery power),
Temp Charge Mode (for temperature controlled charging) and standard Delta Peak Charge
Modes are also available.
★Dual cooling fans allow for stable and safe charging. Fans operate automatically.
★Temperature probes included for safe charging.
★Real-time charge data is displayed on an easy-to-read backlit LCD display panel.
■Application ： R/C models
Rechargeable batteries used for electric powered cars, planes, boats
Charging receiver battery packs
■Input Power ： DC 12V (12~16V)
Above 14A (30A suggested)
※
Input power requirements will vary depending on the charge settings.
example) Charging two 6-cell (7.2V) batteries at 6A each = min. 14A
Multiply the total charge amps by 1.5 to obtain power requirements.
■Compatible ： Compatible with NiCd(Nickel Cadnium) & NiMh(Nickel Metal Hydride) cells
Batteries 1~12 cells (12~14.4V)
■Charge Amps ： 0.3~9.9A (1~7 cells)
0.3~8.0A (8~10 cells)
0.3~6.0A (11~12 cells)
■Case Size ： 220 x 135 x 56mm (excluding wires)
■Weight ： 870g
Thank you for purchasing the Yokomo BCS DOUBLE
Charger. Featuring two individually separate charging
circuits, the BCS DOUBLE is capable of simultaneously
charging two battery packs using separate charge method
settings. Please read this Owners Manual carefully to learn
how to operate the charger correctly.
Specications
3
Specications Basic Operation Charging Q & A
Customer Support
Precautions
Descriptions
Read before using
A protective lm has been applied to the display panel and button
pad areas when shipped from the factory. Please remove the lm
before using.
Battery (Not included)
Temperature Sensor
（
※
1
）
Cooling Fan
LCD Display
Operating Buttons
Temperature Sensor Plug
Battery Connecting Cord (Black = -)
Battery Connecting Cord (Red = +)
Input Power Cable (Red = +)
Input Power Cable (Black = -)
Battery Connector
（※ 2）
Safety Precaution
When improperly used, the standard battery connector included may not provide a good
connection, causing the connector to overheat and deform. As a safety precaution, when
charging at very high amperage levels, it is recommended that the wire be soldered directly
to the battery.
Specications
Specications Basic Operation Charging Q & A
Customer Support
Precautions
4
Each button is used for both the Main Screen and Setting Mode.
Other Functions
● RESET
Turning the power on while holding the SETUP button will reset all settings.
Button Functions
Main Screen
SETUP TIMER
Use to set the
Timer. Press the
SETUP button after
this button to
change the timer
settings.
RESET TIMER
SETUP MODE
Press to change to
the Setting Mode
screen.
CHANGE DISPLAY
Use to switch back
between displays for
each charge port.
Functions:
START
PAUSE
CONTINUE
Setting Mode
設定変更
（下）
設定変更
（上）
MOVE CURSOR
Use to move the
cursor position to
the next setting.
MOVE CURSOR
Use to move the
cursor position one
character at a time.
CONFIRM
SETTING
Use to conrm any
changes made to
the charge settings.
Also use to return to
the Main Screen.
Basic
Operation
Precaution
To prevent multiple commands, the keypad buttons will not respond by pressing lightly.
Press the button for about 0.5~1 second.
Basic Operation
5
Specications Basic Operation Charging Q & A
Customer Support
Precautions
Display Information
Opening Screen (After power input)
Charge System
①
Setting ModeMain Screen
Charging
Charge System
②
※ The VX.XX displayed in the upper right-hand corner
of the screen is the rmware version number,
Automatic screen change
Setting ModeMain Screen
Charging
Basic Operation
7
Specications Basic Operation Charging Q & A
Customer Support
Precautions
Charge Settings
Charging
Setting Procedure
The BCS DOUBLE has many settings to provide safe, accurate charging.
Always conrm your charge settings before charging.
Changing screens
★
Set the settings for Charge Systems
①② .
Press the FUNCTION button to change
screens between Charge Systems
①② .
The LED (green) on the front panel will
indicate the displayed Charge System.
The screen can be changed at anytime
between the two systems as long as the
display is not in the Setting Mode.
Change to Setting Mode
Press the SETUP button to change the
display to the Setting Mode. Look for the
cursor to be displayed.
Move cursor to different setting
Press the FUNCTION button to move the
cursor to the setting you want to change.
※ To adjust the charge amp setting for the Delta Peak Charge Mode, see P10.
Changing setting values
Press the UP and DOWN buttons to
change setting values.
Return to the Main Screen
Press the START/STOP button to return
to the Main Screen.
Charge settings will not be erased when power is turned off.
Charging
Specications Basic Operation Charging Q & A
Customer Support
Precautions
8
Any of the following three charge modes can be selected.
Delta Peak Charge [Linear Mode]
PEAKCHG
This charge mode uses the common Linear charging
method. Battery voltage is closely monitored
throughout the charge. Charging stops when the
system detects a Delta Peak.
This charge mode is suited for practice batteries and
receiver battery packs.
Yokomo Charge [Pulse Mode]
YOKOMOCHG
Specially developed for racing use, this revolutionary
pulse charging method allows batteries to be charged
for high voltage and run-time without causing any
damage to the battery cells.
★ Set the charge amperage 1.5-times higher than normal when using this charge mode.
Temp Charge [Linear Mode]
TEMPCHG
The system monitors battery temperature via the
temperature probe and will stop charging once the
batteries reach the set temperature. This helps
overcharging or false-peaking of the batteries.
Safety Precaution
Always make sure to securely attach the temperature sensor to the batteries before charging, and
check to see that the sensor is working properly. An improperly attached sensor may cause an
inaccurate temperature reading, and possibly causing the battery to be overcharged.
Charge Mode
Charging
9
Specications Basic Operation Charging Q & A
Customer Support
Precautions
Charge Amperage
Use a Charge Amperage setting best suited for your batteries.
Recommended
Setting Values
SANYO RC3000 : 4.5A
SANYO RC2400 : 5.0A
SANYO RC2000 : 5.0A
★ When using the YOKOMOCHG mode, set the Charge Amperage 1.5 times higher.
Charge Cut-off Capacity (Safe Charge Setting)
Always set the Charge Cut-off Capacity to prevent
overcharging. Charging will stop when the battery
reaches the set capacity value.
Recommended
Setting Values
SANYO RC3000 : 3600mAh
SANYO RC2400 : 2800mAh
SANYO RC2000 : 2500mAh
Approx. 1.3 x Battery Capacity
Charge Cut-off Temperature (Safe Charge Setting)
Always set the Charge Cut-off Temperature to prevent
overcharging. Charging will stop when the battery
reaches the set temperature value.
Recommended
Setting Values
Nickel Metal Hydride : 42
℃
Nickel Cadnium : 45
℃
Charge Cut-off Voltage (Safe Charge Setting)
Always set the Charge Cut-off Voltage to prevent
overcharging. Charging will stop when the battery
reaches the set voltage value.
Recommended
Setting Values
7.2V (6 Cell) : 13V
Approx. 1.7 x Battery Voltage
Charging
Specications Basic Operation Charging Q & A
Customer Support
Precautions
10
Delta Peak Cut-off Voltage
Pressing the TIMER/RESET button while in the
Charge Setting mode will displat the Delta Peak
Voltage Cut-off setting screen. Press the
START/STOP button to return to the main Charge
Setting screen.
Use a Delta Peak Cut-off Voltage value best suited for
your batteries.
Raising the Cut-off Voltage value will lengthen charge
duration.
Recommended
Setting Values
Nickel Metal Hydride : 10~20mV/cell
Nickel Cadnium : 20~30mV/cell
※ This setting can be changed when using either the PEAKCHG mode or YOKOMOCHG mode.
Charging
Specications Basic Operation Charging Q & A
Customer Support
Precautions
6
Preparing to Charge
1
Connecting the power cables
Connect the power cables to a power supply
(stable power supply rated above 12V 14A).
The LCD display will light up when powered.
2
Connecting the battery
Attach the included battery cables to the plugs
on the front panel as shown in (a).
Connect the battery cord to the battery as
shown in (b). Battery voltage will be displayed
on the screen.
3
Connecting the temp. sensor
Attach the temperature sensor to the plugs on
the front panel as shown in (c).
Attach the temperature sensor to the battery
using a piece of tape as shown in (d).
Battery temperature will be displayed on the
screen.
★To prevent damage to the temperature
sensor plug, avoid frequent removal of
the temperature sensor plug.
Connect to power supply
(Black = Negative)
Connect to power supply
(Red = Positive)
a
b
c
d
Basic Operation
11
Specications Basic Operation Charging Q & A
Customer Support
Precautions
Charging
Make sure that the display has returned to the Main Screen. (Same screen as when rst powered)
Changing Screens
Press the FUNCTION button to view the
screens for Charge System
①② .
The green LED lamp on the front panel will
indicated which screen is being displayed.
Start
Press the START/STOP button to begin
charging. The red LED lamp will light up and
the battery capacity value will start to increase.
Stop
Press the START/STOP button to stop
charging. Press again to re-start.
Charge Complete
The red LED lamp will turn off when charging has
completed. The screen will display READY to indicate a
successful charge. Charge capacity and voltage will
also be displayed.
If the battery did not charge completely, the charge
amperage value will change to indicate a code as shown
on the right. Here is a list of possible codes and what
they mean.
[CO.O A] Battery cell number problem
[VO.O A] Charge Cut-off Voltage reached
[MO.O A] Charge Cut-off Capacity reached
[TO.O A] Charge Cut-off Temperature reached
[EO.O A] System hardware problem
※ If the code reads [EO.O A], turn the power off, and
then on again.
※ To continue charging another battery, press the
TIMER/RESET button to reset the displayed data.
Charging
Charging
Specications Basic Operation Charging Q & A
Customer Support
Precautions
12
Re-Peaking the batteries before running will help obtain additional battery power.
Make sure to clear the data from the previous charge
before Re-Peaking. Pressing the TIMER/RESET button
will clear the data. Press the START/STOP button to
start charging once more. Re-Peaking the battery is the
process of charging the battery once more after it has
already been charged.
Re-Peaking
Set the timer to start charging at a later time.
Press the TIMER/RESET button. As soon as the TIME
is displayed on the screen, press the SETUP button.
Set the amount of time to wait before charging and
press the START/STOP button to conrm the setting.
Press the START/STOP button again to start the timer.
Timed Charging
example) start charging in 10 minutes
Charging
13
Specications Basic Operation Charging Q & A
Customer Support
Precautions
Q
Nothing displayed on screen
A. Problem with power supply...... Not enough current coming from power supply
A. Bad connection........................ Improperly connected or deteriorated connector
A. Malfunction.............................. Possible blown fuse (internal) or damage due to power/battery cords
connected in reverse
Q
Incorrectly displayed on screen
A. Reset all settings. Turn the power off and then turn the power on while holding down
the SETUP button.
Q
Temperature not displayed on screen
A. Temperature Sensor damaged .......................... Replace the temperature sensor.
A. Temperature Sensor not connected correctly .... Make sure that plug is fully inserted.
Q
Temperature reading incorrect
A. Sensor not connected correctly.......................... Sensor not securely attached to battery,
Q
Buttons do not work
A. The buttons must be pressed down for about 1 second. (Safety feature)
Q
[ERROR] message displayed
A. Incorrect connection...................... Battery connected incorrectly.
Q
Does not charge completely
A. Charge settings not optimal........... Adjust Temperature, Capacity and Voltage Cut-off settings.
A. Bad battery..................................... Battery polarity reversed, or bad cell.
A. Bad connection.............................. Incorrectly connected or damaged connectors.
A. Charger overheating...................... Allow charger to cool before charging again.
Q & A Troubleshooting
Q & A
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