Opus BT-C2000 User manual

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BatteryChargerBT-C2000 - OPERATING INSTRUCTIONS
1. Intended Use
The chargeris intended to charge anddischarge NiCd or NiMH chemistryrechargeable batteries
only.Itprovides fourindependent charging slots forAA orAAArechargeablebatteries. The
included adapters provide the additional abilityforC & Dsize rechargeable batteries. The charger
can also test and optimize the maximum capacityof the rechargeable batteries.Eachcharging slot
has its own display to show variousinformation such as, chargingcurrent, battery voltage, charged
capacity, dischargedcapacity,battery internal resistance and time.Secondgeneration hardware
including Delta-Sigma 16bit ADC provides improved charging circuit performance and thermal
management.
The chargercan charge ortestbatteries of differenttype, different size, and different capacity at
the same time. Eachcharging slotmay be programmed witha different working mode and current
parameters ifdesired. When charging is complete FULL willshow in thatchannel display then the
maintenance charge is started automatically.
Thisproduct fulfills European andnational requirements related to electromagnetic compatibility
(EMC). CE conformity has been verified and therelevantstatements are available upon request.
Unauthorizedconversion ormodification of the chargeris prohibited and voids the manufacturer's
warranty.Any usage other than described above is not permittedand can damage the productand
lead to associated risks such asshort-circuit, fire, electric shock,etc. Please read the operating
instructionsthoroughly and keep them for future reference.
2. Safety Instructions
The manufacturer assumes noliability fordamages to property or personal injury ifthe product
has beenabused,modified or damagedby improper use orfailureto observe theseoperating
instructions.
2.1 Product Safety
§The product must not be exposed to substantial mechanical strainor strong vibrations.
§Do not operatethe charger if it appearsdamagedin any way.
§The product must be protected againststrong electromagnetic fields, static electrical fields,
extremetemperatures, direct sunlight and moisture.
§The manufacturer’sinstructions forthe respective batteries mustbe observed.Ensure the
batteries can acceptthe programmed charge and discharge rates before attempting
charging.
§The product should notbeconnectedimmediatelyafter ithas been broughtfrom an area
ofcold temperatureto an area of warm temperature.Condensed water mightcause
damage.Waituntil theproduct adapts to thenew ambient temperature before use.
§The product isto be used only inan indoor dry environment.
§Sufficient ventilation mustbe provided whenoperating the charger. Nevercoverthe
ventilatingslotsof the charger. Ensure adequate ventilation for the batteries under charge.
Do not place the unit on the carpetas this can block ventilation slots on the charger
body. Operateonly in awell-ventilated area.

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2.2 Battery Safety
§Correct polaritymustbe observed while inserting the batteries. Alwaysinsert the battery
cells with the positive tip facing the top of the charger.
§Non-rechargeable batteries, rechargeable alkaline batteries (RAM),lead acid batteries
and lithium batteries must notbe charged with this product.There is danger of fire or
explosion!
§Batteries should be removed from the device if itis not used fora long period of time to
avoiddamage through leaking. Leakingor damaged batteries might cause chemical burns
whenin contact with skin;therefore use suitableprotective gloves to handlecorrupted
batteries.
§Batteries must be kept out of reach of children and pets.
§Batteries must not be dismantled, shortcircuitedor thrown into fire.Never allow battery
contacts to become shorted.
§Useonly NiMH orNiCd rechargeablebatteries.Never recharge non-rechargeable batteries
due to risk of fire or explosion of the batteries.
3. Delivery Contents
Battery Charger BT-C2000 1 pc
WallPower Adapter 1 pc
OperationInstructions 1pc
C &D celladapters 2 pc's
4. Operating Elements
5. Power Supply
The wallpower adapter included is the main power supply for thischarger.Onlyapproved power
suppliesmay be used to power the BT-C2000charger.The included powersupply provides +12Vdc
at1.0A Ithas a coaxialDC power plug, which inserts into the power jack on the rearof the charger
main unit,of 5mm OD, 2.1mm IDwith center positive. The chargermaybe operated from
approved portable poweradapters that supply thecorrect voltage and minimumcurrent
requirements.
6. Operation
Uponinitialpowerapplication the firmwarerevision level is displayed in the leftmost digits of the
display.After approximately one second alldisplay segments are displayedfor approximately two
seconds The “null” icon will then beshown for all channelsuntilbatteries are inserted.This
indicates thatall internal self-tests passed and the charger is ready for use.

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Once arechargeable battery is inserted,its instantaneous voltage will be displayed for 3seconds.
Mode CHARGE and current value 400 mA willbe displayed for another3 seconds.Ifno button is
pressed during these 6 seconds,the chargingprocess willstartat the defaultvalue of400 mA. Any
buttonpress during this 6 second time will cause thecharger towait for another 10 seconds
before entering the working mode.
Ifno particularslotis selected by pressing theSLOTbutton,the MODE, DISPLAY andCURRENT
buttons refersto all 4 slots simultaneously.Flashing channel display indicates selection of that
channel.Allfour channel displays flashing indicates thatMODE,DISPLAY and CURRENT buttons
refer to all fourchannels simultaneously.The chargerdisplay backlight turns on after each key
press and remains on for 30 seconds after the last key press.
6.1 MODE Selection
Atleastone rechargeable battery mustbe inserted in achannel inorder toprogramthe charger.
Press and hold the “MODE” button for 2 seconds to startmode selection for selected slots.
Press the MODEbutton subsequently at leastone time to toggle among the working modes. Press
the MODEbutton until the desired working mode is shown in theselectedchannels.
The workingmode may be changed any time while abattery is in the charger bypressing and
holding the MODE button for 2 seconds.
Working Modes:
CHARGE
DISCHARGE
DISCHARGE - REFRESH
CHARGE - TEST
QUICKTEST
CHARGE Mode
Inthe CHARGE mode therechargeablebattery ischargedup to itsmaximum capacity at the
selectedcurrent. Charge termination or fullcharge is determined with amodified -dV (minus delta
voltage) algorithm.The proprietary modified algorithm ensures that full charge termination is
detected by the charger,even at low charge currents. Once fullcharge is detected the charger
enters amaintenance charge process supplying minimumchargeto thecell so thatit remains at
fullcapacityuntilready to use.
Note: When attempting to charge cells with high impedance, the chargerwill not rejectthe cells
as withsome other chargers. Instead the cell will be charged at a reduced currentfrom the
programmed setting. This willallow chargingof high resistance cells so thatthey maybe cycled to
improve their capacity and internal resistance.
Example: Insert battery into a slot. CHARGE will flash in that channel display. Press CURRENT
button to select 200, 400, 600, 800, 1000, (1200 or1400) mA for the charge rate.
If CURRENT button is not pressed the current will automatically default to 400 mA.

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DISCHARGE Mode
Inthe DISCHARGEmode the rechargeable battery is discharged toa preset battery voltage (0.9V)
then discharged is terminated.At discharge termination 0 mAcurrent is displayed in that channel
display.Press the DISPLAYbutton to view discharged capacity.
Example: Insert battery intoa slot. Press MODE button untilDISCHARGE is displayed.
Press CURRENT button toselect 100, 200,300, 400, or500, (600 or 700) mA discharge rate.
If CURRENTbuttonis not pressed the discharge currentwill automatically default to 200 mA.
DISCHARGE - REFRESHMode
Inthe DISCHARGE-REFRESH modethe rechargeablebattery is dischargedthen chargedrepeatedly
to optimize to its maximum capacity. Old rechargeable batteries or rechargeable batteries that
havenot been used for along period oftime can be restored with this mode. Depending onthe
selecteddischarge andchargecurrent, it can take tens of hours forcompletion. Refresh mode will
make 3 complete discharge-charge workingcycles.When the discharge-charge cycles are
complete FULL willbe displayed in the channeldisplay.
Example: Insert battery into a slot. Press the MODE button until DISCHARGE-REFRESH is
displayed. Press the currentbutton for 100, 200, 300, 400,500, (600 or 700) mA discharge rate.
If the CURRENTbutton is not pressed the dischargecurrent willautomatically defaultto 200 mA.
CHARGE - TEST Mode
The CHARGE-TEST mode tests the present capacityof a rechargeable battery.The maximum
capacityis determined byfirst fully charging the battery, then discharging thebattery while
measuring dischargecurrent and time. The battery isthen charged to full. After completion of the
CHARGE-TEST mode,tested battery capacity is displayed inmAh orAH alternating with the FULL
indication.
Example: Insert battery into a slot. Press the MODE button untilCHARGE-TEST is displayed in
that channel.Press the CURRENT button to select200, 400, 600, 800,1000, (1200 or 1400)
charge rate. If CURRENT button is not pressed the current willautomatically defaultto 400 mA.
QUICK TEST Mode
The chargerwillanalyze the dynamic internal batteryresistance by applying a load current and this
current reading is referred to the voltage drop detected on the battery.Within 10 seconds the
tested battery resistance will be displayedin the unitof milliohms (thousandthsof an ohm).Only
fully chargedbatteries should be tested for internal resistance. Please note that the internal
battery resistancecan be very small, and contact resistance can be a major factor; thus with the
samebattery tested in a differentslotor even in the same slot with different contact conditions,
measurements canvary by up to 20%.
Example: Insert battery into a slot. Press the MODE button untilQUICK TEST is displayed in that
channel. This symbol will appearin that channel-- --. Wait fora numberornumbers to appearin
place of the symbol -- --;this may take 30 seconds or longer. This will be the battery internal
resistance in milliohms. A reading of 55 represents 55 milliohms or 0.055 ohms.
NOTE: Due to greater contact resistance,measuring internal resistance ofhigh capacity C and D
cellswith the included C&D to AAadapters isunreliable. Typicallyinternalresistance ofhigh

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capacityC and D cells isvery low. In this case contact resistance is much greaterthan the internal
resistance of the cell.The addedcontact resistance of the adaptercontacts renders the
measurementinvalid.
6.2 CURRENTSelection
After the Mode isselectedpress the CURRENTbutton to toggle between availablecharge/
dischargecurrentselections. Default charge currentis 400 mA.Available selections are 200 mA,
400 mA,600 mA, 1000 mA. If batteries are inserted in onlyslots 1 and 4 the charging current can
befurther selected to 1200 mA or 1400mA for channels1 or 4.Ifchargecurrentis selectedto
1200 mA or 1400mAfor channels 1or 4 and batteriesare then inserted into slots 2 and 3,the
charge current in slots 1 or 4 will be reduced to 1000 mA maximum.
Dischargecurrent isautomatically selected at one half of the charge current.Maximumdischarge
current is 500 mA.If battery slots 2 or 3arenotoccupiedthen600 or 700 mA dischargecurrent
maybe programmed for dischargecurrent. However actualdischarge current may be lower
depending on batteryinternalresistance.
6.3 DISPLAY Selection
Press the DISPLAY button to toggle among the display of Voltage,Current, Capacity and Time.
§Charge/DischargeCurrent: the instantaneous currentis displayed.
§Time Elapsed:The charging/discharging timeof the last cycle is displayed.
§Accumulated Capacity: The accumulatedcharge or discharge capacity is displayed in mAh or Ah.
§Voltage:The instantaneous battery voltage is displayed.
§Quick Test:displays the measured internal battery resistance in milliohms.
§Full: Battery fullcharge detected. After the rechargeable battery is fully charged maintenance
charging will be started automatically. Maintenance chargingprevents the rechargeable
batteries from being overcharged when left in the chargerand compensates for self-discharging
of the batteries.FULL willflash in the display whenfull charge isdetected.
6.4 SLOT Selection
Pressing the SLOTbutton will start the slot selectionprocessin the sequence: Slot 1, Slot 2, Slot 3,
Slot4,All4 Slots,and Exit.Flashing display segmentindicatesslot selection. If allfour display slot
segments are flashing,this indicates allfour slotsselected. Mode and Current selection will then
befortheselected slots.
7. Temperature Monitoring
Battery temperature and charger internal temperature are monitored duringoperation. Battery
temperature of 60 degrees Celsius (140 degrees F) or controllerboardtemperature of 77 degrees
Celsius (171 degreesF) willcause operationto besuspended. Four batteries are temperature
monitored individually.Two controllerboard sensorsmonitor charger internaltemperature. If
controllerboardover temperature is detected, currentwill besuspendedfor the corresponding
two battery slots. If batteryover temperature is detected onlythe affected channelcurrentwillbe
suspended accordingly.The charging/discharging processwillonly resume once the temperature
ofthe batteries drops below 40degrees Celsius (104 degrees F)or chargercontroller board
temperature dropsbelow 50degrees Celsius (122 degreesF) as appropriate.

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Monitored battery temperature may alsomodify the chargeprogramselected. DeltaT (the
temperature change) algorithmis notthe primary algorithm fordetermining abatteryfull-charge
condition; however, temperature is measured andused tomodify the charge profilein a
proprietary method. Thisensures that battery temperature never approaches critical limits and
protectsbatteries from temperature extremes. As a fail-safemethod batterytemperaturemay
cause charge termination as a fullcharge eventif otherparameters are met aswell.
8. Maintenance
The device is maintenance free but should be cleaned occasionally. When cleaning, the device
must be removed from any power source. Only use dry and soft cloth to clean the housing of the
charger Do not use abrasive or solvents.
Repairs may only be performed by authorized repairstations.Any repairor modification not
performedby an authorized repair station voids the manufacturer's warranty.
9. Disposal
9.1Disposalof waste electrical and electronic equipment.
Inorderto preserve, protectand improve the qualityof environment, protect human health and
utilize natural resources prudently andrationally, the user should return unserviceable product to
relevantfacilities in accordance with statutory regulations. Thecrossed-out wheeledbin
indicates theproduct needs to be disposedseparately and not as municipal waste.
Neverdispose ofbatteries ina fire. Explosionand personal injury may result.
9.2Usedbatteries/rechargeablebatteries disposal.
Regulations requireproper disposal of rechargeable batteries.Disposing usedbatteries inthe
household waste is prohibited. Batteries containing hazardoussubstances are markedwith the
crossed-outwheeled bin. The symbolindicates that the productis forbidden to bedisposed via the
domestic refuse.Return usedbatteries to authorized recycling stations or usedbattery collection
center.
10. Technical Data
Operating Voltage
12V DC (10Vmin
16V max)
Power Adapter Input: 100-240 V~, 50/60HZ
Output: 12VDC, 1.0A
Charging
Current range
20
0
-
1400
mA
Discharge Currentrange 100 -500 mA
Max. Charging Capacity 20,000 mAh (20 Ah)
Operating Temperature
0to 40
°
C
[Poorquality picture omitted (of C&Dadapters installed)]
OneYearLimited Warranty
SupportinNorth America -Email: [e-mail]
Manufactured by: Opus Instruments Co. Ltd, Shenzhen Guangdong, China