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Battery Charging Centre

ALC 8500-2 Expert

Operating Instructions

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Summary of Contents for 8500-2 Expert

Page 1: ...Battery Charging Centre ALC 8500 2 Expert Operating Instructions ...

Page 2: ...4 1 Charge 47 12 4 2 Discharge 47 12 4 3 Discharge Charge 47 12 4 4 Test 47 12 4 5 Refresh 48 12 4 6 Cycle 48 12 4 7 Forming balancing 48 12 4 8 Maintain 48 13 B Resist battery Ri measurement function 49 14 Conf menu 51 14 1 Database 51 14 1 1 New Bat 51 14 1 2 Edit Bat 51 14 1 3 Del Bat 52 14 1 4 Return 52 14 2 Charge discharge parameters 52 14 3 Setup ALC 53 14 3 1 Illuminat 53 14 3 2 Contrast 5...

Page 3: ...of the maximum possible number of charge discharge cycles When you bear these aspects in mind the cost of a sophisticated efficient battery charger is quickly recouped 1 1 The essential performance features of the ALC 8500 2 Expert The ALC 8500 2 Expert is an absolute top notch device in terms of battery charging technology and includes performance features offered by no other charger It provides ...

Page 4: ...es can be displayed for each battery individually Wide range of charge programs for optimum battery care charge discharge discharge charge refresh cycle test capacity measurement forming balancing trickle charge after main charge Support for different battery technologies NC NiMH Lead Acid Lead Gel Lithium Ion Li thium Ion Polymer Lead acid activator function for elimination of sulphate deposits I...

Page 5: ...r protective electro nics Always read and observe the instructions for charging provided by the battery manuf acturer 2 Safety Notes The ALC 8500 2 Expert is designed to operate on a mains voltage of 220 240 V AC 50 Hz For this reason it must be handled with exactly the same amount of care as any other mains powered piece of equipment This device must not be allowed to fall into the hands of child...

Page 6: ...e pack Important charging multiple batteries simultaneously The negative terminals of the ALC 8500 2 Expert s four charge outputs are not interconnected inter nally and therefore are not at the same voltage potential For this reason it is not permissible to connect batteries to different charge outputs whose negative or positive terminals are connected to each other externally Caution Observe the ...

Page 7: ...tery positive terminal sockets 7 Battery negative terminal sockets 8 Charge output 1 9 Charge output 2 10 Charge output 3 11 Charge output 4 12 Channel LEDs 13 LED lead acid activator function 14 Power indicator 15 USB interface back panel 16 Socket for external temperature sensor back panel 2 4 5 3 8 9 10 11 13 1 14 15 16 7 12 6 ...

Page 8: ...s constant partial discharges followed by topping up The electrolyte then tends to crystallise out at the electrodes thereby obstructing the flow of electrons within the cell A series of discharge charge cycles often has the effect of restoring the full capacity of such packs Clearly a charger which only provides a simple charge function is not sufficient for optimum mainte nance of any rechargeab...

Page 9: ...flat although a useful quantity of residual energy may still be present A battery must be at a defined state of charge if its internal resistance is to be determined and as a basic rule the pack should be virtually fully charged before carrying out the measurement If you wish to compare different cells it is especially important that they should be at the same initial state of charge If abrupt vol...

Page 10: ... brief A further difficulty is the fact that informative results can only be achieved if the voltage is measured directly at the battery terminals otherwise voltage fall off in the measurement cables would seriously falsify the result To fulfil these requirements special measurement cables optional are used each wire featuring two spring loaded probes Fig 1 These probes make reliable contact with ...

Page 11: ...der storage conditions the result is a covering of crystalline sulphates all over the lead plates The thicker the deposits become the less energy the battery can store and of course the less it can deliver At higher ambient tem peratures the rate of sulphate build up rises considerably Sulphate deposits are the primary reason for the premature failure of lead acid batteries The Activator function ...

Page 12: ...ront panel of the charger features a pair of sockets for each charge panel to which the battery or batteries to be charged are connected The graphic screen and convenient menu system make it very simple to operate the charger 10 1 Basic settings The ALC 8500 2 Expert is switched on by pressing the mains switch located at bottom left of the front panel First a brief initialisation phase occurs duri...

Page 13: ...battery voltage the charge current and the capacity of the selected channel The bottom half of the screen continues to display the overall summary of all four channels Fig 3 The symbols available in the graphic area and their meaning Channel not used Charge Charged full Discharge Discharged empty Waiting Pause Puls Charge Error ...

Page 14: ...ction is impossible as the ALC 8500 2 Expert cannot predict how many charge discharge cycles have to be completed before the battery reaches its maximum capacity In this case a time estimate is only displayed when the final cycle is reached Fig 6 shows the symbols associated with the time displays The bottom half of the screen displays the message Channel not used if you select a channel to which ...

Page 15: ...row buttons or the jog dial press the OK Menu button to confirm your choice The screen display which now appears varies according to the status of the channel you have selected i e whether that channel is already in use whether you have already entered data for that battery or whether that channel is still free and avai lable for use If the charge channel is free the display window shown in Fig 9 ...

Page 16: ...rature sensor for super fast charging is connected to the socket on the back panel For those functions which consist of several automatic charge di scharge cycles it is possible to enter a defined interval between the termination of the charge process and the start of the subsequent discharge process Fig 17 A brief press of the OK Menu button calls up the appropriate data entry window where the ti...

Page 17: ...of a completely discharged pack to around seven hours C 3 the battery is charged or discharged at a current corresponding to one third of the numeric value of its nominal capacity C 2 the battery is charged or discharged at a current corresponding to half of the numeric value of its nominal capacity 1 C this is the lowest setting which is generally termed a fast charge at this rate the battery con...

Page 18: ...n charger for an indefinite period 12 4 2 Discharge When this function is selected the battery connected to the ALC 8500 2 Expert is discharged down to the final discharge voltage appropriate to the pack the capacity removed from the battery is dis played on the graphic screen 12 4 3 Discharge Charge First the ALC 8500 2 Expert initiates a discharge process in order to pre discharge the battery co...

Page 19: ...neration function is to revive batteries in this state The program automatically repeats the charge discharge cycle using the pre set charge and dischar ge currents until it detects no increase in capacity When the cycle program has finished the screen displays the last value for charged in capacity and then switches over automatically to a trickle char ge which compensates for energy loss through...

Page 20: ...ge 1 A to 10 A although we recommend selecting as high a current as possible otherwise bearing in mind the typically low internal resistance of these batteries the voltage drop will be extremely small Low current pulses only make sense with batteries which are unable to cope with high peak loads Informative results can only be achieved if the voltage is measured directlyatthebatteryterminals other...

Page 21: ... battery voltage in the zero load state the voltage under load and the pulse current which is actually flowing The Ri measurement function concludes automatically after which the last recorded measured values continue to be displayed on the screen If you wish to record a further series of ten measured values under the same conditions simply press the OK Menu button once more When Ri values are act...

Page 22: ...teries in the database i e batteries which you have not yet stored Press the OK Menu button to move to the menu and confirm the Sel Name menu point You can now enter a name of your choice with a maximum of nine characters This is the procedure select the cha racter using the jog dial and select the position with the arrow buttons Fig 27 Press the OK Menu button to confirm your selection after you ...

Page 23: ...enu which are once again selected using the jog dial or the arrow buttons Confirm your choice with the OK Menu button and you can then alter the settings within the available limits The following parameters can be modified NC Final discharge voltage for NC batteries in the range 0 8 V to 1 1 V per cell NiMH Final discharge voltage for NiMH batteries in the range 0 8 V to 1 1 V per cell LiIon Final...

Page 24: ...ble Fig 30 Menu points in the Setup ALC menu 14 3 1 Illuminat In this menu Fig 31 you can set the duration of the display backlighting in active mode after the last operation of the controls buttons jog dial The times available are 1 minute 5 minutes 10 minutes 30 minutes and 60 minutes It is also possible to switch the backlighting on or off permanently 14 3 2 Contrast Calling up this menu enable...

Page 25: ... 16 Reading out the data logger on screen The ChargeProfessional PC software is available as a convenient means of reading out the data logger All the data stored in the ALC 8500 2 Expert s flash data memory can also be displayed directly on the screen When a process is concluded the DF Read Dataflash read function is available in addition to Resume this is used to display the discharged capacitie...

Page 26: ...ch the voltage of the cell and therefore also the voltage of the charge channel falls during the discharge process However this does not result in a capacity error as the actual measured cur rent is used as the basis for calculating the cell s capacity In fact the screen always displays the battery voltage under zero current conditions this is always significantly higher than its voltage under loa...

Page 27: ... charge discharge channels are switched off Bat hot The external temperature sensor has registered a battery temperature outside the per missible range Overvolt The battery voltage is too high or has been set incorrectly Alternatively the connection between the charger and the battery may have been inter rupted Overcap The dU detect circuit has not tripped even though a charge factor of 1 6 has be...

Page 28: ...harger do not open the case as it contains no parts which you can repair or replace yourself Send the complete unit to our Service Department for repair Do not leave batteries connected to the charger for a long period when it is switched off as they could suffer damage through being discharged If a battery leaks do not touch it with your bare hands use rubber gloves or similar Never allow the che...

Page 29: ...nnel LEDs lead acid activator indicator Controls Buttons jog dial Special functions Battery Ri measurement lead acid activator Socket for external temperature sensor Integral data logger Interface USB Software Flash memory for updates and upgrades Power supply 230 V 50 Hz Dimensions W x H x D 315 x 204 x 109 mm This symbol means that electrical and electronic devices when they reach the end of the...

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