isl 8-936g - Schulze Elektronik
isl 8 chameleon high end
issue 09.01, page
Instruction Manual
isl 8-936g
Software versions 3.75-3.80 and V4.xx
Microprocessor controlled
Quick Charger
Capacity Tester
Battery Conditioner
for Sealed Ni-Cd, Ni-MH and Lead-acid (Pb) Batteries
• Graphical Display of Charge Voltage
• Data Transfer Interface for Personal Computer (PC)
• Internal fan, temperature controlled
isl 8 chameleon high end
Chapter Topic
General information
General remarks and precautions
CE certification
Mounting instructions CE ring
Functions of main output ("akku1")
The first step
Output 1 ("akku 1")
Ni-Cd battery programs
Output 1 ("akku 1")
Lead-acid (Pb) battery programs
Output 1 ("akku 1")
Charging/discharging 1-3 cells
Output 2 ("akku 2")
for Ni-Cd batteries
Output 3 ("akku 3")
for Ni-Cd (receiver-) batteries
Cut-off automatic
(among other things: hints for Ni-MH batteries)
Monitoring and safety facilities
Special adjustments
Additional sockets (side-mounted pin board)
Energy re-transfer function
Monitoring functions on LCD-panel
Protection circuits, error-messages and warnings
Important notes
Data interface - serial port
Windows software winsoft
Output 1, discharging up to 14 cells with external discharge resistors
Technical data
Additional sockets
pin codes
PC interface
pin codes
PC interface
data format
Standard setup charge- and discharge programs
Menu - tree -structure
New features in version 4.xx
Character table for name and password input
Standard ready made configurations in version 4.xx
Installing a software-update Eprom
schulze elektronik gmbh • prenzlauer weg 6 • D-64331 weiterstadt • tel: 06150/1306-5, fax: 1306-99
e-mail: [email protected]
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Measures / questionaire to avoid errors
41, 42
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isl 8 chameleon high end
1. General information
Congratulations! With the isl 8-936g you have purchased a top of the line product made in Germany.
Reliable SMD technology, outstanding performance and flexibility and last but not least their easy
handling have made the previous models very popular. By adding the most up-to-date electronic
devices, a third charge output and a modified discharge circuit which re-transfers energy into the car
battery, the chameleon high end has become even more powerful and flexible.
The isl 8-936g requires no maintenance, but needs to be protected against dust and moisture. Openings
in the housing are essential for cooling and must not be blocked! The chameleon high end provides
best operating comfort and maximum reliability. Using the automatic L charging option, you will notice
that the isl 8 microprocessor will charge you batteries as fast as possible, yet as carefully as necessary.
All three outputs may be in use at the same time. Additionally you can discharge your batteries, measure
their capacity and condition them. Same options are available for sintered Ni-Cd-, Ni-MH and Lead-acidbatteries.
The new big graphical LCD (Liquid-Crystal-Display) panel provides user guidance via softkey-functionbuttons and allows the transfer of charge data and parameters to a personal computer either on-line or
from the non-volatile memory.
In order to make full use of your new charger we strongly recommend you to read the Instruction Manual
page by page and take note of the hints in the grey shaded areas. Although the supplied text is rather
long, there is valuable information in each sentence.
Note: In order to get to a certain point in the menu, you may have to change the screen several times.
Therefore in this manual you will sometimes find the complete sequence of key-operations, including
the appropriate screen text, starting from the initial powerOn display.
You will find in Chapter 27 (MenueTreeStruct.) an overview of the available function-key descriptions.
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2. General remarks and precautions
The CE marking which you will find on all schulze products indicated that the equipment has been
tested to meet the stringent European safety and radiation requirements; this does not mean that you
do not have to follow these instructions!
The cooling fins at the rear of the charger have been precision extruded and then machined; they may
have sharp edges; handle with the same care with which this equipment has been manufactured.
Please remember that fast-charging Ni-Cd batteries can push the batteries to their limit; never operate
the chargers unattended. The charger as well as the batteries may get warm; when in use, they should
be placed on an appropriately sized, non-heat-conducting and non-combustible surface. By following
these rules extensive damage will be avoided in case of a mishap.
Many modern transmitters are equipped with an internal reverse-voltage protection diode. No “smart”
charger can fast-charge these transmitters unless this diode is bypassed (shunted) (see chapter 12 for
additional information when charging transmitters). Preferably, you can remove the transmitter’s battery
and fast-charge it outside the transmitter. If you want to bypass the diode, contact the transmitter
manufacturer. In no case should the fast-charge current for a transmitter pack exceed 1.2 Amp.
Do not modify the charger’s car battery power cables or connecting clamps; they are very low loss
to support the charger’s high-end charge capabilities. Do NOT insert fuses and NOT plug the charger
into the car´s cigarette lighter!
Do not cross-connect individual output charge cables or wires thereof; each charger outlet has its own
sensing circuitry. Prevent electrical contact between any charger outlet and your car’s body. All this may
damage your charger and/or your batteries! It is safest to place the charger on the ground. Place the
charger on a safe support, do not “hang” it somewhere under the hood. The best approach is to use a
separate, fully charged, dedicated 12-V battery and take it to the flight line.
The internal software is always checking for operational errors.
Do not operate the charger in the case that any of the cables are damaged or frayed, or in case the
display panel indicates an ERROR.
The isl 8 charging devices operate on 11 to 15 VDC, but may only be connected directly to a 12 V
car battery!
Should you decide to operate the charger from a (110V AC to 12V or 13.8V DC) power supply (“battery
eliminator”), then make sure this power supply is well regulated, can supply continuous DC current as
high as 35 ... 45Amps(!), has a very high output capacitance (>5000µF/16V), very low ripple and is
insensitive to the frequency of the carger´s internal switching voltage converter. Using any other source
is likely to damage your charger or your batteries, and voids the warranty. NEVER use an automotive
battery charger as the source for the precision-engineerd schulze charger.
Because of the high charge current capabilities of these chargers, you should always use high-quality,
gold-plated connectors in the charge cables to your batteries. Also, use heavy-duty (12-g) flex wire. We
recommend you use either schulze short circuit protected charging cables and/or (in the USA) Astro
connectors, the Deans Ultra plug or similar. See you local hobby dealer or call R/C-Direct.
Always connect the banana plugs of your charge cables first; then, connect the charge cable to the
battery. Note that “open” banana plugs, when the charge cable and battery are connected, carry the full
battery voltage (and current).
Note that all chargers have ventilation holes. Especially in discharge mode or when charging batteries
less than 12V, the charger will dissipate energy, and thus get warm (the isl-8 even has an internal cooling
fan). Do not block these ventilation holes and make sure you allow free air flow through the cooling fins
located at the rear of the charger.
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issue 09.01, page
Protect the charger from direct exposure to the sun (the sun´s heat will temporarily turn the LC-display
black), dust, moisture and rain(!).
Even though the schulze chargers are smart (they are micro-processor equipped and can determine
a battery’s number of cells and its optimum charge current pattern), attempting to charge the following
packs should not be attempted:
batteries built up from cells of different types and capacities
batteries made from different types of single cells
batteries with a different charging level of the cells
non rechargeable cells (dry cells)
batteries which are not expressly designed for fast charging and recharging.
defective or damaged packs or cells
already fully charged and/or hot batteries
battery packs with internal charge-current limiting devices
batteries which are buildt-in (internal) to other equipment
Do not exceed a battery’s design (maximum) charge current as specified by its manufacturer; note
that the schulze chargers will still optimally charge these packs in automatic charging mode; you can
program the charger’s max (limit) charge current.
When charging high-capacity battery packs with less than 7 cells, exercise extra care to make sure
that these are not over-charged; packs which are (too) deeply discharged may cause the charger to cut
off too soon.
New batteries will only achieve their maximum capacity after several charge/discharge cycles;
schulze chargers can be programmed to provide these cycles automatically.
Always verify the charge amount which your battery has absorbed (mAh or Ah) after a full charge (this
is indicated on the display panel); this is probably the best gauge of a battery’s health and/or the proper
operation of the charger. This way, you will avoid unexpected loss of power and/or control.
Please remember that battery packs can heat up considerably during a high-current discharge cycle;
program your charger’s max discharge current to prevent overheating of the packs unless you provide
additional cooling (some of the racing pilots now use a tube with electric fan cooling!). Note that e.g.
discharging a 27-cell 1000mAh battery at 5A (=5C rate) will dangerously overheat this battery; the
schulze charger can (and) should in this case be programmed to the limit discharge rate to a more
acceptable level, for instance 1A (=1C) and/or a battery cooler in combination with the temperature
sensor for cut-off must be used. You can also use our build in low-temperature-start circuit. (Do not forget
to activate temperature sensor to the right pack output and fix it at the right battery.)
An additional important function is the selection of the automatic cut-off circuit. Read the important
comments in Chapter 12). Maximum protection against malfunctions of the cut-off automatic is provided
by selecting additional cut-off criterias like max. temperature, max. energy input and max. charge time.
Warranty on your new schulze charger is six months after the date of first purchase. Expressly
excluded from this warranty are failures due to incorrect use and/or damage(s) to any object(s) and/or
person(s) resulting from the correct or incorrect use of this charger. Before returning a schulze charger
for repair, please check the charging of a single battery pack using a fully charged car battery; go through
the check list at the end of the operating manual; if you still have problems, then, add a [brief] description
of the problem you encountered, proof of purchase (date), your address and your telephone number.
isl 8 chameleon high end
3. CE certification
The products described in this manual are manufactured in accordance with all specific
and mandatory European CE guidelines:
EMI 89/336/EEC, 91/263/EEC and 92/31/EEC.
The products have been tested according to these norms:
EN 50 081-1:1992
EN 50 082-1:1992 or EN 50 082-2:1995
Design and construction of our products comply with the requirements for safe operation.
EMI emissions were tested under realistic conditions, i.e. using maximum charge current
and high number of cells.
Further testing is done to ensure adequate EMI-resistance against emissions from other
devices. The HF signals used for these tests are similar to those produced by mobile
telephones or RC transmitters.
Be sure that the ferrite-ring is not broken.
Be sure, that all cables to pack 1 ... 3 are as short as possible.
The maximum cable length inclusive the cable of the packs must be shorter than 20 cm.
Be sure, that all charge cables are winded 4 times through the CE-Ring.
They avoid transmitting disturbing frequencies.
They may not be mounted more than 5 cm from the 4mm male connectors.
4. Mounting instructions CE ring
Use 2.5 mm2 cables, 1 cable red, 1 cable black.
Solder 1 male socket at every end of cable.
Slide ring from free end of cables to 4 cm to the male sockets. Make additional 3 windings
through the center of the ring.
Cut cables to 15 cm, if cables at the pack have 5 cm (Max. total length 20 cm)
The cables now looks like those of the picture below.
Bind cables with short pieces of heat shrink tubes.
Solder your connectors on to the free ends of the cables now.
You can also use our pre-fabricated charge cables CE-kab-i8.
Warranty repairs are performed in Germany or in the USA; out-of-warranty work will performed at
same locations, for a nominal charge. Return units which are found to be in good operating condition
will be subjected to normal manufacturing tests. There will be a nominal charge for this, wether the unit
is in warranty or not.
Additional parts:
not included
More than a thousand schulze chargers are in use around the world every day without any problems.
They perform….again and again.
3 x included
We hope that you, too, will join this happy schulze family.
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isl 8 chameleon high end
5. Functions of main output (akku 1)
Charge- and discharge programs of Pack 1 are split into 5 groups, which can be selected using the +/
- buttons after you have pressed f2:pack 1, f2:p1param und f2:progrm. The charger will perform the
option you select by pressing the enter button. All programs use those currents as their maximum, which
were chosen under C-curr and D-curr.
2 Lead-acid Battery Charging programs
2 Lead-acid Battery Discharging programs
4 Ni-Cd-Battery Automatic-Discharge programs
4 Ni-Cd-Battery Manual programs
4 Ni-Cd-Battery Automatic Charge programs
PB L, PB l, (at V4.xx: akku2 output)
PB-e, PB-E,
aut3CD, aut2CD, autoCD, auto-D,
fixt-D, fixCD, fixDC, fix C,
auto C, autoDC, aut2DC, aut3DC
22 Battery Charge/Maximum currents 0.1mA, 0.15, 0.2, 0.25, 0.3, 0.5, 0.4, 0.6, 0.8, 1.0, 1.2,
1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, max.(9A)
22 Battery Discharge/Maximum curr. -0.1mA, -0.15, -0.2, -0.25, -0.3, -0.5, -0.4, -0.6, -0.8, -1.0, -1.2,
-1.5, -2.0, -2.5, -3.0, -3.5, -4.0, -4.5, -5.0, -5.5, -6.0, -6.5,
Manual selection of the 9A charge current is not possible (max. 9A only available in automatic mode).
The actual charge current may also vary with battery type, number of cells, battery condition etc.
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issue 09.01, page
6. The first step
- Take the chameleon high end out of the packaging.
See Chapter 2: General Remarks and Precautions. Lack of air circulation may cause overheating.
- Remove the 5 sockets at the left side of the housing (if not packed separately anyway).
- Connect the chameleon high end to the 12 volt power source car battery.
Note: No batteriepacks must be connected to the charger during this procedure. Try to achieve a good
contact to the car battery terminals first time, otherwise you may not get the power-On screen on the
display. In this case disconnect immediately and retry after about 5 seconds.
- The LCD panel shows the powerOn Menu screen (powerOn visible at right top) with the ms-logo
and the name of the device isl 8-936g chamaleon high end plus date and time.
- Press f2 pack1 to have a look at the screen for Output 1:
The screen will show an empty coordinate-system graph with a horizontal minute scale and a
vertical voltage scale. pack 1 is displayed at top right of the screen.
- Before you connect a batterypack, check the top line of the display (Battery-status) whether the
charge program suits your batteries. The selected charge program is displayed after the text
ready / rdy.
Normally the fully automatic charge program auto L, available for Output 1 and 2, will be the best choice.
The fully automatic programs will check the battery several times during the charge regarding its energy
consumption ability and adjust the charge current accordingly. Therefore no specific knowledge about
cell type and number is required, as long as it is a sintered type between 100mAh and 4.0 Ah.
The fully automatic programs can only perform correctly if the charging leads have adequate cross
sections (2.5 mm2 - also for Tx- and Rx-batteries!!!) and the cells are soldered together (i.e.: no spring
loaded battery boxes!).
If the charge current stays below 1C (1C=nominal capacity of the battery), the battery is usually not (or
no more) quick chargeable. Especially at low cell numbers this may also cause problems for the
automatic to detect full condition.
In this case it is advisable to adjust the charge rate manually or even better:
Replace the battery!
If you want to change the parameters for pack 1, press f2 p1 param again. This will open a new submenu giving the function keys f1 to f5 new meanings and names.
It is the f2 button again with which you choose charge or discharge programs. In the second row above
the function keys the display shows the current values which have been set at the factory (or later: the
ones which you had selected).
Pressing the f2:progrm key will create a small field of #-letters in the display showing the actual program.
The descriptions of the key functions will move up like signatures above the windows which is activated.
The bottom line (directly above the keys) will now show the actual functions of the esc and enter keys.
Furthermore two arrows point at the +/- keys at the right side. With these keys you can scroll through
all available programs for Output 1.
After you have found the program you want, confirm your selection by pressing enter. The new program
will become active after connecting the battery. If the old program suits your needs best, it is not
necessary to scroll back: Just press esc.
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1) Program select: f2: progrm:
auto C
Note: If a menu item on the display appears inverse (black background), the appropriate function key
is temporarily blocked (i.e.: during test phase of Pack 1).
If temperature value appears inverse, battery is not assigned and cutoff is deactivated.
A ‘*’ in front of a menu item indicates, that this function is not available yet, but may be activated during
a future software update.
Individual charge / discharge currents may be selected manually. The automatic programs will use these
manually selected currents as maximum currents. The range of current may vary during charge/
discharge, but will not exceed the selected maximum current.
2) Currents: f1: D-curr. / f3: C-curr.:
Discharge I-2.0A, Charge I=max.
Adjust cut-off automatic mode.
Normal will suit most batteries
3) Cut-off automatic: f4: cutoff:
Back to the pack 1 screen:
Press f5: p1param2 to get the next menu screen.
Number of cells (f1) will indicate 0, as no battery is connected yet. Later during charging or discharging,
the number calculated by the device may be corrected manually.
- The program which is displayed in the top line will start after the battery is connected.
The charge amount will be continuously updated right next to the program / current display. Next to it
you can see the temperature, measured via a connected sensor. At present this is for information only
and can not be used for temperature cut-off purposes.
Next important step in setting up the safety functions is the max. energy input. To charge a completely
empty 1700mAh cell, usually an energy input of more than 2000 mAh is required.
4) Max. charge input for empty 1700er cells: f2: QUANTmAh: 2400mAh.
On the right side of the display, below the car battery voltage (inverse for better contrast) the status of
the other two charge Outputs is shown.
Next safety function is the max. charge time. Charge times in automatic mode will vary depending on
battery type, number of cells, cell condition etc.
If the required charge time exceeds 3 hours, something is seriously wrong: either the battery is defective
or the charge leads and/or the connectors are unsuitable.
5) Max. charge time for Ni-Cd-Batteries: f3: TIMEmin:
30 minutes.
- A Full indication or the disconnection of a battery will automatically cause a change to the
appropriate screen to show this event. The name of Pack x (inverse) can be seen in the right top
corner of the screen.
Next item in the menu determines the initial program for output 1 when the device is connected to a power
6) Program at Power-On-Reset: f4: PORprog:
auto C.
Temporarilly connect a battery to Output 1 and watch the screen.
The top line will display from left to right: charge time, battery voltage, charge current, charge amount
and temperature.
Finaly you can decide whether you want to use short discharge pulses during charge. This methode is
recommended to re-activate ´tired´ batteries.
This method should be most useful with Tx- and Rx- batteries which are never completely discharged.
7) Refresh charge: f5: refresh:
The chameleon high end will complete the charge (if you leave the battery connected) and indicates
FULL (or EMPTY after discharge) together with a melody (or a buzz if melody = 0) which will stop after
a short time.
8) Note: The single available thermal sensor may be assigned to different outputs (see Chapter
13). If the sensor was selected to monitor the temperature of a battery and is not plugged into
the device, a continous acoustic alarm is initiated.
You should now know the most important functions. Still, we strongly recommend you to study the rest
of the manual to make the best use of your device and learn about further options and how to interprete
Please also check the menu for output 2. Here the options are reduced, i. e. there are no discharge
functions and currently no PB-charge modes.
By playing with the keys without any batteries connected you get to know the isl 8. The selection of
functions and the variation of values is always the same. If you are looking for a certain function, please
use the Menu-Tree-Structure for reference.
- The esc key will always get you back to the powerOn Menu screen without changing any values!
From the powerOn Menu screen press f5 twice (f5:i8param1, f5:i8param2) and then f4 (f4:name) if
you want to add a personal word/name.
Default on delivery is the name schulze elektronik gmbh with a “v” acting as cursor above the first
letter "s".
Other standard values can be called up with the function keys on the right side
(date: 15. 6.95, time: We 12:30, copy: buffer1 to memory ...).
Use f2 and f3 to move the cursor left or right. f1 and f4 will delete the letter below the cursor before it
will move to the next position. To change the letters use the +/- key, marked with sign select.
Press enter to store the new name in the non-volatile memory of the isl 8, or press esc to clear all
changes and leave this sub-menu.
For full batteries with maximum safety the following adjustments are recommended:
(Recommendations shown in bold typing)
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The chameleon high end will complete the charge (if you leave the battery connected) and indicates
FULL (or EMPTY after discharge or TEMP or TIME or QUAN when cuts-off by the temperature, time
or quantity limit) together with a melody or a buzz (Melody=0) which will stop after a short time.
You should now know the most important functions. Still, we strongly recommend you to study the rest
of the manual to make the best use of your device and learn about further options and how to interprete
warnings and errors.
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Ni-Cd charge program with manual charge current selection (fix C)
7. Ni-Cd-battery programs, output 1
These programs will charge your batteries with the selected current until full condition is detected.
Buzzer and display will indicate FULL condition and the charger will switch to trickle charge ("t").
Please note that the microprocessor may reduce the current if due to the chosen charge rate the rising
voltage or current threatens to cause overheating.
Suitable charge currents may be selected by the following rule:
Charge current = 2 x C (C=nominal cell capacity)
Cell capacity C = 1.2 Ah, charge current 2 x 1.2 = 2.4A
Selected charge current: 2.5A
After being disconnected from the car battery, the chameleon high end will turn back to a chosen
program or to the last one (last) being selected (see Menu-Tree-Structure).
Last will store the program type when a battery is connected.
If a different program is required, it has to be selected before connecting a pack.
After termination of the chosen program - the pack is now full or empty - a buzzer or a melody will play
for a short time period and the blinking light output becomes permanently activated. To interrupt just
press the +/- key. The LCD panel shows the final values.
As the screen only shows the graph for one battery you may want to know what is happening on the other
Outputs. Press f5:packStat from the appropriate screen and the display will provide the status of all
connected batteries at the time f5 was pressed. No update will take place in this mode.
Ni-Cd charge program with automatic charge current selection (auto C)
Using this program, the charger automatically calculates a charge rate which suits the battery. The
battery will continuously be checked during the charge and the charge current is adapted to the actual
condition. Initially the program starts with 300mA, then increases the current to the calculated values,
which may result in a reduced current towards the end of the charge.
The program will not exceed the maximum value set in menu item C-curr.
After ‘Full indication’ the charger switches to trickle charge. Charge time, battery peak voltage and
loaded capacity are displayed on the screen. Full indication also starts buzzer or melody module for a
short time.
Note: In contrast to other programs, this fully automatic program always starts with a double beep when
you connect the battery.
Program- and Parameter selection:
While pack 1 screen is shown on the display, press f2:p1param to get to the parameter sub-menu of
Output 1.
By pressing the - key you get to the discharge and PB programs. Pressing the + key will get you to the
automatic combination programs. The constant current programs are located in between.
To get to and from the Lead-acid programs no battery must be connected.
Whenever an automatic program is selected, auto or aut will appear in the display.
Note: Program select is closely linked with the menu items D-curr. and C-curr.
Please read the following paragraphs.
Ensure the cut-off mode and safety functions selected will suit your battery.
If the safety functions have been set up incorrectly, they may not only loose their intended purpose
(avoiding overcharge in case of a malfunction), but may even cause adverse results, i. e.:
Interrupting the charge before the battery is full.
Data like charge time, voltage at end of charge and charged capacity may give valuable information
about the charge behaviour, the capacity of the connected battery-pack or improper full indications.
Ni-Cd discharge program with manual current selection (fix D)
This program starts with the D-curr current you have previously chosen, when connecting the batteries,
and ends when the discharge voltage is reached. During the whole discharge the current will be kept
at the value you selected, or may be reduced in order not to exceed the performance range of the
chameleon high end.
In contrast to the Capacity Measuring program, the discharge programs enable you to determine the
remaining capacity of a partially discharged battery (for example to measure how much is left in your
Rx battery after a couple of flights).
At the end of the program discharge time, discharge voltage and discharged capacity will be displayed.
A buzz or a melody will be activated for a short time.
Note: For precise measuring of battery capacities a discharge current of 1/10 C is recommended, i.e.:
a 1000mAh battery should be discharged with 100mA.
For practical purposes higher discharge rates can be tolerated and may even be more realistic.
Info: The discharge cut-off voltage used for the Ni-Cd-discharge programs is about 0.85V per cell. The
microprocessor will detect the number of cells with sufficient accuracy, but manual corrections may be
made via menu item cellnmb, while the program is running.
This feature is available for all programs of Output 1 and 2 ("akku 1" and "akku 2").
When deep-discharged cells are connected, the number of cells will automatically be corrected after
about 10 minutes.
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7.4 Ni-Cd discharge program with automatic currentsselection (auto D)
8. Lead-acid (Pb) battery programs, output 1
This program will discharge the battery connected to Output 1 down to the discharge voltage. The
discharge current will not exceed any discharge value programmed under f2:pack1, f2:p1param, f1:Dcurr.) However, the initial discharge current is always limited by the max. discharge performance or the
max. discharge current of the isl 8.
Low capacity batteries (Rx-battery) or batteries which allow re-charge into the car battery, may be
discharged at a lower rate to prevent damage. Recommended constant discharge rates are 1C to max.
These figures are also valid for the fix D program.
In contrast to fix D, auto D will automatically decrease the discharge currents towards the end of the
discharge. the current will be reduced in steps and finally turned off.
This way, the cells may be discharged to a lower level.
The Lead-acid Charge Programs can be easily identified by the symbols ‘PB’. PB stands for Plumbum,
the 82nd element in the periodical system of the elements.
The isl 8 then begins first with a calibration cycle of the 16Bit AD-converter, which takes
several seconds. The discharge time shows 0:00 in the display.
After finishing calibration, time begins to run and the discharge stage starts slowly
discharging up to the maximum allowable performance.
A buzz or a melody will be activated for a short time.
The PB-programs with their automatic cell number detection are a real innovation, but require intact and
pre-charged batteries for correct voltage and current selection.
The charge current will be calculated according to the battery voltage. Nearly full batteries or old
batteries mostly do not charge with the current you expect.
Due to the automatic cell number detection, the program can only be used for charging/discharging
of Lead-acid and Lead-gel batteries with nominal voltages of 2, 6, 12 and 24V (1,3,6, 12 cells).
Press the ‘-’ in progrm menu to get to the PB-Programs.
To change from Ni-Cd-Programs to PB-Programs and vice versa, no battery should be connected
to Output 1.
PB-Batteries act completely different from sintered Ni-Cd-Batteries which are commonly used to power
model aircraft, cars or racing-boats. Despite their high capacity, PB-batteries are not suited to provide
high curents without a significant loss of useable capacity and a noticable drop in voltage. The same
applies to the charging procedures, where most manufacturers recommend a 20 hour period (at 0.1C
with max. voltage limitation) for a full charge.
7.5 Ni-Cd battery conditioning programs (autoDC, fixDC)
The PB-Programs of the chameleon high end will gradually increase the charge current until the
maximum voltage is reached, after which it will be reduced.
This program will discharge the battery connected to Output 1, starting with a value as described
under auto D, then further reducing the current in steps down to the discharge voltage, followed by an
auto C charge.
This program is intended to erase any memory effect and is particularly suited to freshen up Tx and
Rx-batteries which are usually never completely discharged in normal use.
The autoDC program will run auto D and auto C in sequence.
Please read the descriptions of the individual programs to understand the way they work and how to
set the currents.
For new or irregular maintained batteries a single discharge/charge-cycle may not be enough to
achieve a complete formatting of the cells. In this case auto 2 or 3DC provides the option of automatically
running two or three automatic-discharge-charge programs.
These programs will finish like an auto C program, with buzzer or melody.
Only the usual charge data, but no information about the discharge cycle will be displayed on graphic
The packStat menu will show the capacity values of all charge/discharge cycles.
The PB-Programs provided will enable you to charge PB-Batteries to an almost full level in just a few
hours. First time the voltage limit for cycle charge (ca. 2.45V/cell) is reached, an ‘a’ will show up behind
the charge time on the display. At this time the battery is about 75% full. Further charging will take
considerably longer. About every 5% increase in capacity will change the indication letter to ‘b’,’c’,... and
it may take the same time for the last 25% as it took for the first 75%. After full indication a buzz or a
melody will be activated for a short time and the charge voltage limit will be set to the level for continuous
charge (ca. 2.275V/cell) by reducing the charge current. This allows one to keep the battery in full
condition or may even increase the charge. The charged Amp-hours will be further added and displayed.
The above explanations contain no specific data but will give you some idea what happens when you
run the PB-Charge Programs.
Don’t be amazed if the chameleon high end indicates a full battery after only 70% of the nominal
capacity has been charged, especially on capacities below 3Ah. Be reminded that the capacity (i.e. the
performance) of a PB-Battery may have suffered during previous use and bad maintenance (Overcharges, many 100% discharges or even deep discharges). For further information please check the battery
7.6 Ni-Cd capacity measuring program (autoCD, fixCD)
PB-charge programs (at V4.xx: akku2 output)
This program will automatically fully charge the battery connected to Output 1 and then discharge
down to the discharge voltage
This program enables you to monitor the performance of your batteries during their lifetime, allowing
you to estimate their usefulness.
The autoCD program will run auto C and auto D in sequence.
Please read the descriptions of the individual programs to understand the way they work and how to
set the currents.
The programs can run automatically for two or three times (...2CD, ...3CD).
At the end of the discharge the graphic display will show discharge time, discharge voltage and
capacity, and a buzz or a melody will be activated for a short time.
The packStat menu will show the capacity values of all charge/discharge cycles.
PB-C and PB-c. Both charge programs perform an initial battery check to calculate a suitable charge
current but the actual charge differs: PB-c uses a lower current than PB-C. PB-c will provide a more
gentle charge and may achieve a higher capacity level, especially on smaller batteries. PB-C is
recommended for faster charges and to fresh up batteries before use.
PB-discharge programs
PB-D and PB-d. Both discharge differ according to their intended use.
For more precise capacity measuring purposes we recommend PB-d which limits the maximum
discharge current to 200mA.
For general discharge or bigger batteries (3Ah+) you can use PB-D. This program will initially discharge
with the highest possible current (if you do not limit the current in the menue; same as the Ni-Cd Program
auto D) which will be reduced towards the end of the discharge.
Both programs will terminate discharge at about 1.72V per cell.
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9. Charging / discharging 1-3 cells, output 1
12. Cut-off automatic
Note following safety warnings and hints:
Output 1 and Output 2 ("akku 1" and "akku 2"):
Before going into detail with the various cut-off automatics, please be reminded:
Selecting normal will usually give you the best results.
Charging: Normally buzzer and display warns when cells are connected which voltage are too low.
After 30s, charging cycle will be finished, if charging voltage does not increase above a certain value.
These warnings and the previous switch off can be oppressed when pushing the plus button within the
first 30 seconds of charging. When pushing the button, you must be in the corresponding graphical
akku x screen.
tmpON, tmpOFF: Temperature monitoring and cut-off, switching ON (enable) and OFF (disable):
When temperature-cut-off is assigned to a pack (activated), the temperature is displayed in normal
figures (not inverse) on the screen. If the sensor is not connected or the cable is broken, the display
shows --° and an acoustic warning is initiated. A connected battery will not be charged / discharged,
charging or discharging will be interrupted. Toff will appear in the upper status line.
When temperature monitoring is activated, isl 8 is waiting before it starts to charge or discharge until
temperature is below 41°C. When chameleon high end is waiting, you can see temp.lim on the LCD.
Note: It is your responsibility to attach the sensor to the correct battery!!!
After chosen tmpON or tmpOFF the display will show you the last cut-off choice again.
Warning: Voltage peak of the cells is not very high when charging less than 4 cells. Cut of automatic
function is not guaranteed. It is possible, that automatic stops charging too early, too late ore not. Be
sure, that charging current is as high as possible for the charger and near the maximum for the cells.
Discharging: No special procedures necessary.
Note: The hardware is not specially designed to discharge 1 Ni-Cd cell. Discharging currents are
reduced, when voltage is lower than 1 volt.
peakOFf: disable delta peak cut-off:
Continuous charging is possible, the charge current will not be interrupted by delta-peak cut-off. C-curr
is automatically set to 100mA when chosen tmpOFF or when chosen tmpON and the temperature
sensor is not connected. It is not possible to increase current without connected battery when
temperature cut-off is disabled. Maximum charge current without peak cut-off and without temperaturecut-off is 500mA.
Continuous charging lower than 250mA is made by pulse current (the display shows a "m" instead of
the leading zero of the charge current).
strict: Delta Peak cutoff with very stringent criteria:
This peak detection mode should only be used if there have been premature cut-offs in normal mode.
This could be the case with deep discharged 1700 N-SCRC cells.
10. Output 2 for Ni-Cd batteries
Output 2 works similar to Output 1, but with the following limitations:
1) The charge performance of Output 2 is only 1/3 of Output 1.
2) The missing discharge facility does not allow for discharge or combination programs.
Program select and charge current select have been combined under C-curr.
All currents witht I=.... use the fix C programm, auto5A uses the auto C programm limited to a maximum
of 5A
The Ni-Cd-battery needs to be connected to the Output 2 ("akku 2") sockets.
Warning: Using selected cells will increase the risk of failing to cut-off the charge. Depending on
the cell type (e. g. mixed cells), the charge current using the auto C program may become so low
towards the end of the charge, that there will be no voltage peak and consequently no cut-off.
11. Output 3 for Ni-Cd (Rx) batteries
This mode can be used with or without temperature monitoring (see Chapter 13).
Starting from the p3param menu, select the number of cells cellnmb, the discharge current D-curr.,
the charge current C-curr. and the desired program (charge: fix C, discharge: fix D or a simple
combination: Discharge-Charge: fixDC or Charge-Discharge: fixCD. Furthermore, there is a
normal: Delta Peak cut-off with well proven cut-off criteria:
This mode is recommended for most cases.
This mode can be used with or without temperature monitoring (see Chapter 13).
combination program autoD+fixC aufiDC. You will find it beyond the temperature on/off
menue points by pressing continuously + pushbutton).
sens+d, sensit: Delta Peak cut-off with sensitive characteristic:
This mode is recommended for mixed cells with a very flat peak voltage curve.
Deep discharged batteries may cause a cut-off very early during the charge. To avoid that, the mode
sens+d includes a delay of 8 minutes before the sensitive cut-off is activated.
Warning: If you use this mode on fully charged cells they may become very hot, because they will be
charged for at least 10 minutes.
This mode can be used with or without temperature monitoring (see Chapter 13).
Connect a 4- to 6-cell Rx-battery to Output 3. The charge or discharge will automatically start with the
selected current and / or discharge with a maximum of 2 watts.
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Ensure that you have selected the correct number of cells and a current to suit your batteries. If
necessary re-program the values for Output 3.
trns+V, transm: Delta Peak cut-off with sensitive characteristic for Tx:
Delta Peak cut-off specially designed for transmitters with build-in discharge protection diodes.
This mode switches automatically to the fix C program and charge current is initially set to 1.2A. You
cannot change the program while in transmitter charge modes. It is possible to change current only up
to 2 A.
In case the charger does not detect the connection of the diode protected Tx, press the + key.
This mode can be used with or without temperature monitoring (see Chapter 13).
Of course, transmitter-batteries with build-in diode cannot be discharged.
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Ni-MH batteries: it is possible to charge them with the two sensitive and two transmitter cutoff
Only use the fix C program and do not use currents higher than 1C (e. g. 1100mAh packs with a current
of 1.0 A!). If isl 8 will not cut-off in the sensitive modes, use the transmitter modes.
Additional temperature cut-off is recommended.
Output 3 ("akku 3"):
The cut-off method on Output 3 cannot be changed. Due to the relatively low charge currents compared
to Output 1 and 2, a voltage level cut-off method is used.
When the voltage exceeds a certain level, the charge current is turned off. After dropping to a lower level,
it is turned on again. Starting with a constant current, the charge will turn into a pulsed charge with
increasing pauses. If the pause length exceeds several minutes, i. e. the battery keeps its voltage over
this period of time, th isl 8 indicates FULL.
The voltage limits are set by selecting the number of cells.
If the number selected is too high, the cut-off voltage of the battery may not be reached. In this case you
can get a continous charge!
(In some cases the charge may still become interrupted, because a Delta Peak automatic works in the
background. Although you should never rely on that!)
This mode can be used with or without temperature monitoring (see Chapter 13).
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13. Monitoring and safety facilities
The charger contains two types of monitoring and safety facilities:
1) Those which protect the device itself, e.g.: the demagnetization-sensor or the maximum charge
performance control to avoid over-heating of the isl 8, and
2) Those which protect the batteries connected.
For those under 1) please see Chapter 18.
As already mentioned in Chapter 6 - The first Step -, correctly set safety facilities may prevent
damage/destruction of your battery in case of cut-off automatic malfunction.
But be aware: Incorrect set-ups may not be able to prevent over-charge and may even cause
premature cut-offs.
13.1) Temperature monitoring
Temperature monitoring can be used for charge- and discharge programs.
The max. temperature limit can be set via f5:i8param1, f2:temp.
The temperature values can be adjusted in steps of 2°, the resolution of the sensor. To switch from
odd to even values you just have to go for the limits. The upper limit will turn to even, the lower limit
to odd numbers.
Only one temperature sensor is available, but it can be used in many different ways.
13.1.1) If the sensor is not assigned to any of the three Outputs, it will turn off the device when the
selected temperature is exceeded.
13.1.2) The sensor can be assigned to any of the three Outputs.
13.1.3) It is also possible to assign the sensor to multiple Outputs. This makes sense if the sensor
is used for emergency cut-off at 75°C. At ‘normal’ cut-off temperatures of 45°C all assigned
Outputs would be turned off, independant of their state of charge, as the sensor can only monitor
one battery.
13.1.4) Assignment of the temperature sensor:
For the temperature sensor no separate menu item is available.
Assignments from Output 1 to Output 3:
Start from menu item cutoff (output1,2) or progrm (output 3).
Turn-off is activated by pressing tmpOFF.
After pressing enter the display will return to the old program.
Turn-On is activated by pressing tmpON.
After pressing enter the display will return to the old cut-off choice/program.
You can now change the cut-off automatic or program without changing temperature assignment.
Temperature on each Output will be monitored (or not) until you change assignment again by
pressing tmpON or tmpOFF.
• Never use Temperature-cut-off on PB-batteries, as it will more likely lead to the destruction of the
battery rather than to a proper charge. Selection of excessive charge currents or constant charges
exceeding the max. voltage will cause permanent damage (loss of capacity) or even destruction of
the battery.
• Using Temperature cut-off for Combination programs (DC, CD, 3DC, 2CD ...) without Delta-peak
monitoring (peakOF), the battery temperature must not exceed the cut-off temperature during
discharge (Select a low discharge current, otherwise the cut-off will cause a premature end of the
discharge cycle).
If Delta-peak monitoring is activated, exceeding the selected temperature will cause an emergency cut-off.
• Disconnected temperature sensors or sensors with defective wires will stop the program together
with the Toff (Temperature sensor disconnected) message.
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17 Control:
Operation from an external car battery
When using an external battery which is not used for starting the car, it can be discharged to a
lower voltage level. Via the Menu-Items f1:i8param, f1:carbatt you can change the threshold value
for the low-voltage warning.
Based on years of experience this value is set at 11.2V, displayed as *11.200mV. In this case the
"*" stands for recommended value.
You can now choose your desired value.
The chameleon high end will stop all operations if the supply voltage drops 600mV below this
value and will display an appropriate error message. Message:
If programs are terminated because the set temperature values are exceeded, the display will show
TEMP instead of the usual FULL or EMPTy message. When using a combination program (Output
1 or 2), the display shows T(f) or T(e) (empty means in this case: discharging interrupted, not really
empty) in addition to temp.lim in the second line of the LCD, when temperature limit is exceeded.
13.2) Charge quantity monitoring:
As the name implies, this function is limited to charge programs.
For activation and set-up of this function, press p1param2, QUANTmAh for Output 1, p2param,
QUANTmAh for Output 2 or p3param2, QUANTmAh for Output 3.
The procedure is very easy: Just add about 10% to what it takes to charge your battery and
program this value. A ">" sign in front of the quantity value means, that quantity monitoring is
The charge quantity must be selected for Ni-Cd and Pb packs separately.
The QUANTity units used in the menu are mAh (milli-Ampere-hours; the graphic display usually
shows Ah (Ampere-hours).
Example: A standard 1700mAh cell requires about 2Ah for a complete charge. The safety cut-off for
this type of battery should be set at a minimum of 2200mAh.
Some selected 1700mAh may even require 2600mAh for a complete charge. If the charge is
frequently terminated by the charge monitoring function, the set value may need to be increased.
Be reminded that a partially charged battery will not be able to consume a full nominal capacity
charge (To avoid the memory effect you should discharge your batteries anyway).
If programs are terminated because set charge quantity values are exceeded, the display will show
QUAN. instead of the usual FULL or EMPTy message.
Operation from a car battery charger
Never connect the isl 8 directly to a car battery charger as it will be damaged. Even when using a
car battery as a buffer the remaining peaks from the car battery charger may cause the chameleon
high end to display irregular error messages.
Operation from an AC/DC power supply
Although operation from a well stabilized Power Supply is possible, it is not recommended due to
the isl 8’s high performance and its capability of energy re-transfer which may cause damage to
the power supply and/or the charger.
When operating from an AC/DC power supply in car battery mode never connect more than 12 cells
(at the beginning of the discharge - also when using the autoCD program - the battery voltage has
to be below 18V) or manually set the discharge current limit to 750mA or less.
With Menu-items f5:i8param1, f3:mns/bat the maximum charge performance on Output 1 (310W)
can be limited to lower values to keep the current from the mains power supply below the maximum. Also the energy re-transfer option will be deactivated.
(Options: carbat=Car battery, full performance+re-transfer; mains=AC/DC Power, no re-transfer)
Simultaneous operation of all three outputs with reduced power is possible, but power of output 2
and output 3 must be added to the power of output 1 (max. power consumption is higher than the
chosen value).
13.3) Charge time monitoring:
All the known and the following adjustments will be stored in the chameleon high end’s nonvolatile memory and will be readily available even after the device has been disconnected.
14. Special adjustments
Activated temperature monitoring can be identified by normal letters on the battery screens. If
temperature monitoring is inactive, the value is displayed inverse.
As the name implies, this function is limited to charge programs.
For activation and set-up of this function, press TIMEmin (time / minute) in the parameter menu
item of the three packs.
The charge time must be selected for Ni-Cd and Pb packs separately.
Setting the max. charge times is quite easy: Just add about 10% to what it takes to charge your
battery and program this value. A ">" sign in front of the time value means, that time monitoring is
The units used in the menu are min (minutes; the graphic display usually uses seconds).
While the expected charge time can be easily estimated for the fix C programs, the times in auto C
will vary according to the calculated charge current.
Still, checking the charge times in automatic mode may give you an indication on the condition of
your battery: Fit batteries require less charge time.
For comparison you have to ensure similar conditions: Identical charge lead (2.5mm2) and similar
temperatures of batteries and surroundings. Cold batteries take longer than warm batteries.
If programs are terminated because set charge time values are exceeded, the display will show
TIME instead of the usual FULL or EMPTy message.
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Note: Be sure, that the power consumption of isl 8 is always lower or equal than the allowed
continuous current of the power supply. Attention: Primary current differs also by the variable
charge voltage of the connected packs!
Note: Power of output 2 is always 1/3 power of output 1. If you are reducing power of output 1, you
are reducing power of output 2 simultaneous.
Safe operation of the chameleon high end from an AC/DC Power Supply may be effected by
further factors like ripple-voltage, continous power performance, compatibility with the frequency of
the voltage converter, adequately sized capacitors (an area where laboratory power supplies
sometimes show deficiencies) etc.
It is the responsibility of the operator to check the reliable function of the combination power supply
and charger. We can not be held liable for problems and damages resulting from unsuitable
Output 3: Cell number and current adjustment
Charge Output 3 must be configured to the used number of cells and the desired charge- or discharge
current. Cut-off automatic works quite differently from that of Output 1 or 2.
Chose a charge current, which does not heat cells too much otherwise they cannot obtain cut-off voltage!
Output1 - Program after reset
You can select the initial program for Output 1 when the charger is connected to a power source.
Press f2:pack1, f2:p1param, f5:p1param2, f4:PORprog and decide whether you want the charger
to start with the last used program (‘last’ will store the program type when a battery is connected) or
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starts with the program, you chose in the menu.
Fan output ("lüfter")
To connect a 12V battery cooler. The output is coded against reverse polarity.
Temperature sensor ("temp. sensor")
To connect the temperature sensor provided (LM335Z).
Melody selection (only for devices with device number 7627 and lower. Now the internal piezobuzzer is on/off switchable).
You can choose between 12 short melodies. Press f5:i8param1, f4:melody to get to the menu-item and
use the +/- keys for changes. Melody 0 means: buzzer is activated. The volume cannot be changed.
Note: The scrolling speed in this menu will vary according to the numbers.
PC-output ("PC")
To connect to a COM-Interface socket of an IBM compatible PC using our 9-pin interface cable. For more
details see Chapter 20, Data Interface (PC-Interface).
This function key, available in the pack x screens, will operate a battery cooler fan connected to the
additional pin board. The shown menu item shows the next function of the key, not the actual state of
the fan.
Note: The internal fan can not be turned off. It runs permanently on 12V to cool the display.
Avoid operation in direct sunlight as the display will become dark!
16. Principle of the energy re-transfer functions (limits, warnings)
If the battery pack voltage is higher than about 18V, it is possible to discharge back into the car battery.
(Hint: Two smaller (maybe 10 cells) packs of identical batteries with identical charge level may be
connected in series to use this feature). The built in voltage transformer is used in a kind of ‘reverse’mode. As energy is not transformed into heat (common practice and still performed at lower cell
numbers), discharge currents can be as high as charge currents.
The energy re-transfer function may be activated during the automatic combined programs or at manual
selected discharge currents from 1.0A, provided that the function has not been de-activated by choosing
AC mains power supply mode.
Currents below 350mA will not be re-transferred for higher measuring precision.
The discharge current will be gradually increased until the selected value or the performance limit of
the chameleon high end has been reached.
If the car battery voltage reaches 15V, the discharge current will automatically reduced in order not to
exceed the 15V.
If an external discharge resistor is connected, the charger will try first to lower the car battery voltage
by connecting the resistor in parallel, before reducing the discharge current. If, due to the resistor and/
or other consumers (e.g. pack 2), the car battery voltage drops below about 13 V, the discharge resistor
is disconnected automatically by the microprocessor.
The Refresh option is available for Output 1 and 3. Refresh charging is supposed to get older, stored
or intermittently used batteries faster up to speed and is particularly suited for Rx- and Tx-battery
We do not take part in advertisement myths: A healthy battery will not become fuller than full. Using
refresh you probably will not detect any increase in capacity or any decrease in internal resistance on
properly maintained batteries.
Refresh is turned off in transmitter charge modes. It is not possible to charge batteries with an additional
discharge protection diode in refresh mode.
15. Additional sockets (side-mounted pin-board)
On the left side of the housing there is a two pole pin board row for external devices.
Note: Please remove all pin board sockets (if not packed seperately) prior to the first use of the
chameleon high end in order to avoid short circuits between the non-insulated pins.
If you solder some cables to the pins, please insulate carefully with heat shrink tube to avoid short circuits
and glue with 5 minute epoxy (do not use cyanoacrylate glue) to fix them.
The positive poles are protected by an internal M16 A fuse.
When operating from an AC/DC power supply in car battery mode never connect more than 12 cells (at
the beginning of the discharge - also when using the autoCD program - the battery voltage has to be
below 18V) or manually set the discharge current limit to 750mA.
How to connect the 1.5 Ohm or other discharge resistors to discharge less than 15 cells with higher
currents read Section 22: Output1. Discharging up to 14 cells with external discharge
Warning: Commercially available resistors will become very hot during discharge (over 100°C) and
are susceptible to short circuits if the windings are not insulated.
They present a potential danger for injuries (burns) or fires. We recommend resistors which are covered
by a housing with an integrated cooling fan or with large cooling ribs to dissipate the heat (accessories).
You have two options: If you want your flight packs discharged as fast as possible, you should connect
the external resistor. If you want to get (or keep) your car battery charged as full as possible (maximum
15V in cycle use), then don’t.
For energy re-transfer a car battery must be connected
The use of an AC/DC Power Supply, even with an external resistor connected, will usually cause
serious damage to the power supply and/or the charger due to over-voltages and over-currents during
the above mentioned process.
If mains-operation has been selected the energy re-transfer function is blocked.
External discharge resistor ("entladelast")
An external resistor of at least 1.5Ohm/150W can be connected to the pin board.
Ensure that the connecting cables are soldered to all 4 ‘+’ pins and all 4 ‘-’ pins of the socket and use
heat shrink tube for insulation.
The discharge resistor will automatically connect in parallel with the car battery when during the energy
re-transfer the car battery reaches the 15V limit. The output is coded against reverse polarity.
Blinking light output ("blinklicht")
To connect an ordinary car indicator bulb 12V/25W for optical full/empty indication.
To turn off the light signal (and/or the buzzer/melody) just press the +/- keys.
Blinking light output
You have the option of blinking light or continuous light at the end of a program. Press f5 i8param1,
f5 i8param2, f1 light to get to the menu-item and use the +/- keys for changes. There is a 12V
Output for loads up to 25W.
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22. Output 1. Discharging up to 14 cells with external discharge resistors
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17. Monitoring functions on the LCD-panel
18. Protection circuits, error-messages and warnings
Car battery - discharge quantity- and discharge current- control indication
You will find the indications in in the graphic screens accumulator 1 to accumulator 3 above the
inverse car battery voltage.
A negative sign indicates a consumption from the car battery (or power supply). If no accumulator is
connected, the power consumption the isl 8 device itself (220mA) is indicated.
Current quantity will be reset when connecting isl 8 to the car battery.
The current- and quantity indication for the primary energy source (car battery / mains power
supply) is a calculated value, which is matched quite well with the reality.
The chameleon high end is equipped with various protection and control circuits to monitor car
battery voltage, charger temperature, maximum performance etc.
Exceeding the limits will, in some cases, interrupt the charge (e.g. car battery over-voltage), the
cause will be displayed and the buzzer will be activated for a short time. The symbols < and > may
be displayed. ‘>’ means bigger, ‘<‘ means smaller.
As error-messages with description and code # , like ‘warning # 5, car battery voltage = min’ are
self-explanatory, the table below should be sufficient. The first digit of the code indicates the Output
number where an error was detected.
Maximum load control
If the current figures during charge/discharge are lower than expected, usually the charger has
automatically reduced the current because a limit has been reached.
For example: When reaching the maximum performance of the voltage transformer, or of the charge/
discharge stage, the display will show a "*" in front of the charge current.
Discharge / energy re-transfer control
Discharge currents are marked with a "-" in front of the current. As soon as energy is re-transfered into
the car battery the "-" is replaced by an "r".
If the charger reaches one of its limits and has to reduce the discharge current, the "-" or "r" will
intermittently replaced by a "*".
If the external 1.5ohm/150watt resistor is switched on (wether it is connected or not) the "r" will become
Status display
Press f5:pckState from the pack x screens to get an overview about the status of all connected batteries
and especially if combined programs are used on Output 1 or 3:
e.g. which combined program has been selected, which part of it is currently running (charge or
discharge) and which phase of the 3DC-program is running:
a: first discharge/charge cycle, b: second cycle, c: third cycle.
In the second quarter of a display line you will either see the manually set up value (e.g. 9A for the 9A
discharge program), or the name of the automatic program.
If the charge current on the LCD panel is smaller than the value in the status display, the charger has
reached a limit and has automatically reduced the current. Usually the maximum transformer
performance has been reached and a "*" is shown in front of the current display. (When you connect
already fully charged batteries, defective ones or batteries which are not quick chargeable, the charge
current will also be lower than the calculated value, but no max. load indication will appear.
The status screen will not be updated during display.
If you change from a discharge to a charge program without disconnecting the battery, the capacity
displayed may be positive or negative, depending on the total resulting energy balance.
Warnings without charge interrupt
Error, interrupt of all programs
Error text with code numbers for
pack 1,
pack 2,
pack 3,
Battery voltage below min.
Max. Battery voltage exceeded
Max. Charge voltage of converter exceeded
Max. Charge current exceeded
Max. Discharge current converter exceeded
Max. Discharge current converter exceeded
Max. Loss performance of power source exceeded
Max. Loss performance of discharge sink exceeded
Max. Charge performance of converter exceeded
Max. Discharge performance of converter exceeded
Max. Device input current (primary current) exceeded
Max. Device temperature exceeded
Car battery voltage exceeded
Car battery voltage at minimum
Car battery voltage below minimum
Internal fuse (for pin board) blown
Charge -time /-quantity /-temperature /-voltage exceeded
Temperature sensor activated, but disconnected or broken lead
Some typical user errors will be listed in more detail, which we strongly recommend you to read
before sending the isl 8 for a repair as you may simply avoid them:
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TIME, Charge time exceeded
If a battery charges for more than 3 hours, we cannot say, that this is quick-charging. If you use auto
C program and your battery is not full within 3 hours, auto C did calculate a wrong current (mostly when
you charge a receiver pack with the original charge leads).
For correct function of the automatic charge current selection a charge lead with 2.5 mm2 is
mandatory. We recommend the use of a charge lead for the flight pack combined with a short (< 50mm)
adapter piece to connect your Rx-battery. The short lead of the Rx-battery normally will not affect the
performance, but no on-off switches with build-in charge sockets must be interconnected.
Disconnect Pack x
Error x77, Charge converter performance over maximum
Error x55, Battery voltage over maximum (e.g. > 50V on a 10 cell pack)
other nonsense errors
These and other unexplainable errors the charger may display, when ...
... connected to a car battery with an operating car battery charger.
... connected to an unsuitable Power Supply.
Keep in mind that due to a different environment or situation, even with time consuming tests it may not
be possible to find the cause of some error displays.
If there are no malfunctions you will still be charged for the time spent on testing!
Before you return the device for a check, test it several times connected to a full car battery to ensure
the problem has not been caused by reasons mentioned above.
EMPTy or RPOL (reverse polarity) - Display during Ni-Cd-Program after about 30s.
To delete the memory-effect batteries may have been completely discharged down to 0V (not possible
with this device). The charging of these packs is possible, but up to a certain voltage a warning will be
The warning mentioned above appears if the voltage does not rise fast enough. This could be an
indication of reversed polarity, if a completely discharged battery was incorrectly connected. It may even
get ‘reverse-charged’.
Hint: The chameleon high end can not detect reversed polarity if a pack is discharged to 0V. It will
always start a normal charge cycle, normally ending after 30s with the message reversed polarity (Rpol)
or deep discharged (EMPTy), if the battery has not reached a minimum voltage by then. For safety
reasons you may have to restart the charge program several times, e.g. when using high capacity cells.
- With completely discharged batteries (< 1V) it may take up to ten minutes until the correct number of
cells is identified.
- A battery voltage below 0.5V on Output 3 is interpreted as reverse polarity.
Disconnect Packs
This message will be displayed if batteries are already connected to the charger while connecting it to
a power source. The device can not decide by itself whether to select a Ni-Cd- or a PB-program or if
Output 2 and 3 may be started uncontrolled. The same message will appear if during the program the
watchdog detects the microprocessor in a state not foreseen by the software (e.g. due to external
Error #9, blown fuse
This error message will be displayed if a short circuit has been caused between the positive pins of the
external sockets and the negative terminal of the car battery.
In this case the internal M 16 A glass fuse (size: 5x20mm) needs to be replaced.
Before opening the housing, disconnect the device from the power source.
To open: Remove all three visible Philips screws and all external sockets!
issue 09.01, page
19. Important notes
- Charging leads are only to be connected to the appropriate Outputs.
- Cross wiring between Outputs may cause short circuits and damage the device and the
batteries (even may cause melting or explosion!).
- Charge/Discharge currents may be displayed without the leading zero, for higher resolution within the
space provided (e.g.: A current of 0.333A will be displayed as .33A instead of 0.3A).
- Transmitters are often protected against discharge by a diode. For quick charge this feature needs to
be disenabled (see Tx-Manual) or must be charged with the transmitter charge option (see cutoff
To avoid possible damage inside the Tx, the charge current must not exceed 1.2A (Graupner mc-18/
20). Watch the charge current when using an automatic program. The resistance of the printed circuit
board may cause the microprocessor to select a charge current too low for safe peak detection. When
in doubt: Choose manual selection.
- A common cause for insufficient charge currents in automatic mode are unsuitable charge leads. The
automatic charge current calculation is based on the measurement of the internal resistance of the
connected battery. The lower the internal resistance, the higher the possible charge current.
a) as the charger can only measure the total resistance (internal resistance+ resistance of the leads +
resistance of the connectors), for correct calculation of the charge current it is essential to keep the
additional resistance at a minimum by using charging leads with adequate cross sections (2.5mm2, also
for Rx-batteries!), high quality (gold) connectors, and a maximum length of 75 cm.
When using thin charging leads and/or on-off switches with build-in charging sockets on low voltage
batteries, the additional resistance of the connectors and cables could be higher than the actual battery
resistance. In this case the automatic charge current would be less than half of what it should be! In such
cases manual current selection is recommended. The microprocessor will also consider the condition
of the cells when calculation the charge current in automatic modes.
Be reminded that on a full car battery the charge current for a 4 cell battery (e.g. Rx-pack) will be restricted
to a maximum of about 2A to avoid overheating of the charger. Even with high capacity cells a higher
charge current will only be selected if the limits of the charger are not exceeded.
- Don’t be amazed if your battery packs seem to absorb lower currents in automatic programs during
the winter months - a cold cell does not perform like a warm one.
- If the charger technically can not provide the charge current manually selected or automatically
calculated (see example above, or e.g. 6.0A at 30 cells), a "*" will appear between voltage and current
values on the display. In this case the actual charge current will be displayed.
- During the measuring phases (a "!" appears between voltage and current figures), some function keys
are blocked. They are also inoperative when the charger has noticed a drop in the charge voltage, so
that peak detection will not be disturbed.
The cut-off automatic can be monitored: it takes several, closely followed voltage drops before the
charge on Output 1 is terminated. The voltage drops detected will appear as a, b, ... between charge
time and voltage values on the display and can be used as an indication for the Full-probability (Also
see the PB-Chapter 8).
With a full battery at this point a "t" indicating trickle-charge will be displayed. To keep the battery full,
the Ni-Cd programs use a pulsed current, the PB-programs use a low constant current.
isl 8 chameleon high end
issue 09.01, page
isl 8 chameleon high end
- Safety Note: As a standard procedure you should check whether the charged capacity after full
indication is about what can be expected. This will allow you to identify any premature full detections
and may also avoid crashs due to only partly charged batteries. The probabilities for premature full
indications depend on several factors. It happens most likely with deep discharged batteries, low cell
numbers or certain battery types.
- Especially on low cell numbers you should perform some test charges to verify correct peak detection.
Full batteries may become over-charged if the peak is not very pronounced.
-If an error (not a warning) appears, all current programs will be interrupted and previous information
about charge time and battery voltage is lost.
- It may take several seconds before the software detects the disconnection of a PB-battery. This is for
technical reasons is to be considered normal.
- You risk malfunctions and damage to the device, if...
... switches or fuses are used between charger and battery
... terminal clamps are replaced by others than 4mm gold connectors
... the device is operated while car engine is running and/or connected to the cigarette lighter socket.
... an unsuitable Power Supply is used
... energy re-transfer into a Power Supply is tried.
20. Data interface - serial port
Note: The Data Interface can be reached from the powerOn screen provided no battery is connected
(data shown inverse if access is not possible).
Charge data (Currents, voltages) can be stored in a non-volatile memory and/or transfered and
displayed from the a) screen buffer, b) buffer, or c) memory.
Explanation to a), b) and c):
a) Screen Buffer
For each pack a certain part of the RAM area (no data storage after power is disconnected) is reserved.
These areas only contain the data for the voltage curve display.
b) Buffer
The chameleon high end is currently equipped with three buffers (RAM areas with no data storage after
power is disconnected). Data can be stored in 1 second intervals for a period of 40 minutes. To extend
the maximum storage capability, every other value of a full buffer will be automatically deleted and
replaced by a new value to achieve 40 / 80 / 160 minute periods with reduced resolution. The last
resolution used by the chameleon high end can be called up by pressing the following key combination
from the powerOn screen: f1:data, f1:buffer and memory resolution.
The resolution of the voltage is 16 bit.
The charge current is always stored using 8 bit resolution, i.e. there is a small data reduction. (Also see
Chapter 20, Data-Transfer).
It is advisable to designate buffer 1-3 to Output 1-3. This can be done by pressing f1:data, f2:pack to
buffer assignment, f5:standard values, or with the same result: f1:data, f5:standard values for f2,
or make your own selection.
Note: The chosen selection can only be changed after a charge process has been stored in a buffer.
E.g.: If Buffer 1 was used for Output 1, Data from the next charge at Output 1 may be assigned to Buffer
2. As long as the same buffer is not used again, previously stored data can be recalled until power is
issue 09.01, page
c) Memory:
The chameleon high end has a non-volatile memory with the size of one buffer area. The complete
information of one buffer can be stored, even if power is disconnected.
Data from the buffer to the memory will be transfered by pressing f1 data, f3 copy buffer to memory.
The copy menu also shows (in square brackets) the latest Output - Buffer configuration.
Data Transfer:
a) Online, i.e. simultaneous while charging/discharging
With only pack 1 connected, data is transferred every second via the serial PC-port, otherwise data is
linked into a 3 second block.
Online data transfer provides the best voltage (16 bit) and current (10 bit) resolution as well as additonal
transfer of State and Temperature values.
These data can be monitored on a PC-screen with our windows software winsoft and may also be
shown or printed (in color).
b) From a buffer or the memory.
Each data transfer starts with a commentary line, which contents the (record-) date, the start time of
the data recording, the data source, the pack number and the used program.
Data transfer will take place as fast as possible with simultaneous display on the LCD.
Data transfer may be started without connection to a PC for visual control of the data. You can stop and
start data transfer by pressing - or + button.
Data transfer can be terminally interrupted by pressing the esc key.
Note: Due to technical reasons the 16 bit voltage of the (discrete) analog to digital converter (ADC) of
the peak detection facility are not as precise as the analog 10 bit values of the microprocessor. The 16
bit resolution (in mV) however makes trends appear more noticable.
During the first 15 seconds of a charge/discharge program the 16 bit voltage values will be calibrated
for better resolution of the data transfer to the winsoft.
21. Windows software winsoft
With winsoft you can receive data from the isl 8, store them in global or selective files, recall them and
display them graphically, compare curves, transform pack voltages in average cell values, show energy
figures, print curves (in color) and much more.
Using a standard windows text program you may also have a look at the raw data as transferred from
the isl 8.
To run the windows software you need Microsoft DOS 6.22 and Microsoft Windows for Workgroups™
3.11. The program may run with earlier versions, winsoft version 3.06 or higher works also with
Installation instructions can be found on the 3.5" disk under readme.txt.
Instructions how to use our winsoft evaluation program are integrated as help lines, which can also be
printed in page form.
Please note that although the program is not copy protected, it will only fully work when it matches with
the registered serial number of your device.
When ordering the windows software we need the serial number of your device.
A wrong number will cause the program to stop after a value of seconds of more than three minutes
displaying ‘demo-version’ on the PC-screen.
(winsoft is available in english and german language)
issue 09.01, page
isl 8 chameleon high end
22. Output 1. Discharging up to 14 cells with external discharge resistors
From now, the isl 8 can discharge few cell numbers with more than 2.5A.
For doing this, there is the need of an additional high power resistor, which is automatically paralleled
to the battery by the isl 8 if necessary.
4 types of discharge resistors are available in 3 different resitance-values:
The 2 types with 1.5Ohms, originally used to discharge the car battery, can now be used to discharge
up to 14 cells.
1) i8-elast-kk, 1.5Ohm/150W, 200 x 60 x 60mm, with cooling-rips.
2) i8-elast-vent, 1.5Ohm/150W, 85 x 85 x 105mm, with fan-cooling.
To connect the 1.5Ohm resistors to the isl 8, a low-priced additional cable is necessary. This cable
makes possible that isl 8 can parallel the resistor to the battery with its internal switch, which is
designed for a maximum of 10A.
3) i8-elast-0.66, 0.66Ohm/300W for maximum of 12 cells, 85 x 85 x 105mm, with fan.
4) i8-elast-0.33, 0.33Ohm/200W for maximum of 7 cells, 85 x 85 x 105mm, with fan.
Instruction for the connection of the additional cable for the 1.5 Ohm discharge resistors:
Because of short-circuits, use exactly the following sequence.
a) Put the 9 pin wire wrap male socket of the additional cable in the 9 pin female socket of the discharge
resistor. Fasten with tape.
b) Put the 9 pin female socket of the additional cable into the „entladelast“ male socket of the isl 8. Only
those 4 pins with negative polarity are used.
c) The red banana plug of the additional cable must be stuck in the + akku 1 banana socket of the isl 8.
d) The battery to be discharged must be stuck at beginning of discharge with the + pole piggyback in
the rear socket of the banana plug. The - pole must be stuck quite normally into the - akku 1 banana
Connection of 0.66 and 0.33Ohm discharge resistors:
These resistors are switched by high current relays in parallel to the accumulator to be discharged.
The switching of the high current relay is initialised by the „entladelast“ output of the isl 8.
a) The 9 pin socket of the thin cable of the discharge resistor must be stuck into the „entladelast“ socket
at the left side of the isl 8.
b) The both banana plugs of the discharge resistors must be stuck in the both akku 1 banana sockets
c) The plugs of the charging cables must be stuck now on the top of the banana sockets of the discharge
Table of the possible and permissible discharge currents:
current at:
1-14 cells
10-14 cells
1-12 cells
1-7 cells
[-*]not permissible, ventilator does not run.
[-**]not permissible, overload of maximum performance.
The actual discharge currents are higher, cause of the isl 8 internally additional discharge
current up to 2.5A.
isl 8 chameleon high end
issue 09.01, page
Adjustments at the isl 8:
To be able to activate the external connected discharge resistor, you must first
a) select the fix-d discharge program.
b) the discharge current on the upper side of the max. current must be adjusted on one of
the three possible resistor values. This means, that you find at the upper end of the
discharge current scale three further values with R=1.5, R=0.66 and R=0.33.
It is essential that you chose the right resistor value. Only then the correct discharge current
value can be calculated and shown. The isl 8 can not measure the external discharge
current, it only can calculate from the battery voltage and the connected resistor value!
c) Then the accumulator can be connected as described on page 27.
The isl 8 then begins first with a calibration cycle of the 16Bit AD-converter, which takes
several seconds. The discharge time shows 0:00 in the display.
After finishing calibration, time begins to run and the linear discharge stage starts slowly
discharging up to the maximum allowable performance (<= 2.5A).
Then the connected cell number is calculated.
After that, the external discharge resistor is switched on. The fan begins turning.
If the undervoltage limit of the battery is reached, the discharge resistor is separated from
the accumulator and switched off as well as the internal discharge stage of the isl 8. the
isl 8 shows „empt“y.
• If you chose one of the three above named current areas for the direct discharge with the
external discharge resistor, the energy re-transfer stage into the car battery is blocked. The
isl 8 discharges with 2.5A or less, according to the connected number of cells.
• Discharging does not occur with constant current. Analogously to a connected motor to the
accumulator, discharge current decreases with lower battery voltage.
• Do not use wrong resistor values an and/or do not forget to connect the discharge resistor.
The isl 8 otherwise shows wrong current values.
• For safety reasons (overheating of the accumulator), the external discharge resistor will
only be switched on by the software in the isl 8 at the permissible cell number and the fixe discharge program. (Not at auto-d and not at the combination programs . and/or. .
• Notice when comparing measured data with your colleague using the same measuring
equipment, that the data can be compared only conditionally with each other. Relatively
high tolerances (approx. 10%) of the high performance discharge resistor(s) are normal.
• In exceptions, the calibration procedure of the 16 bit converter fails. If your battery shows
unrealistic voltages, better do 1-2 control measurements before cutting the battery into its
Important notes:
It is your responsibility, whether the external connected discharge resistor functions as you
expect, since the isl 8 has no possibility to examine the regular function.
• Be sure that the fan turns at maximum rotations - otherwise fire damage is possible!
• Never leave isl 8 discharging without looking on it and its proper function!
• After discharging with high currents, batteries have much higher temperature as normally.
Cool them down.
• If you want to discharge more than 14 cells, remove the discharge resistor (with all cables)
from the isl 8. Otherwise, if you use a normal discharge program, the resistor could be
switched on parallell to your flight battery instead of parallel to the car battery.
issue 09.01, page
isl 8 chameleon high end
25. PC interface, View on soldering side of female sockets
23. Technical data
Pack 1 Output:
Number of cells (@ 1.65V / cell)
Charge currents
(9A autom.)
Charge performance (@ 34V)
Charge performance (@ 50V)
@ 6V (~4 cells)
@ 9V (~6 cells)
@ 11 - 34V (~8-20 Z.)
@ 40V (~24 cells)
@ 45V (~27 cells)
@ 50V (~30 cells)
Lead acid (PB) Batteries:
Capacity from
Charge currents
Trickle charge
0,1 - 4 Ah
0.25 - 6.5A
~ 310 W
~ 280 W
~ 3.1 A
~ 5.7 A
~ 9.0 A
~ 7.5 A
~ 6.4 A
~ 5.6 A
2, 6, 12, 24 V
1 Ah
0.25 - 5.5A
few mA
(Linear) Discharge stage:
PB- und Ni-Cd-Batteries below 18V:
Discharge currents
50mA...2.5A or
max. loss performance
20 W
Energy re-transfer stage:
Number of cells (@ 1.22V / cell) 15 - 34
from 1 Ah
Discharge currents
0.35 - 9A
Discharge performance
~200 W
@ 23V (~19 cells)
@ 30V (~24 cells)
~ 6.7 A
@ 36V (~30 cells)
~ 5.7 A
Pack 2 Output:
Number of cells (@ 1.65V / cell) 4 - 27
0,1 - 4 Ah
Charge performance (@ 26V) ~115 W
Charge performance (@ 40V) ~ 95 W
Charge currents
0.25 - 5A
@ 6V (~4 cells)
~ 1.7 A
@ 9V (~6 cells)
~ 3.0 A
@ 10.5 - 25V (~7-15 cells)
~ 5.0 A
@ 33V (~20 cells)
~ 3.3 A
@ 40V (~24 cells)
~ 2.4 A
Pack 3 Output:
Cells (at 1.5V / cell)
Capacity from
Charge current
Full voltage limit
Supply Voltage
Low voltage warning
Low voltage cut-off
Max. supply current
Idle current
~ 1350g
~ 207x151x68mm
11 - 15.1 V
~ 11.6-10.4V
~ 11.0- 9.8V
~ 45 A
~ 220 mA
24. External pin board sockets layout (Viewing on soldering side of female sockets)
Pin polarity
R Gnd
soldered separation pins
Coded, pin missing, dummy pin in
female socket required
Solder bridge on socket
RS 232 Interface
T = Transmit; connect with
R = Receive; connect with
Signal GND; connect with
SUB D socket
Pin 2
Pin 3
Pin 5
(Pin 3)
(Pin 2)
(Pin 7)
26. Data format PC interface
Data transfer rate:
9600 Baud
Data block:
ttt[-, ,0..9]
Commentary line:
Output/Pack No.
Separation sign
time in seconds
Separation sign
Battery voltage in millivolts
Separation sign
Current in milliamperes
Charge/Discharge indicator
Device number, coded (not in V4)
* Date Day Time DataSource OutputPackNo.
SelectedProgram NumberOfCells
Number of cells: calculated cell number on Output 1 and 2,
cell number as selected on Output 3
External sockets (pins):
Internal fuse (5 x 20mm)
M 16 A
Discharge resistor (1.59/150W)12.5V/10 A
External Light
(21W-bulb) 12.5V / 2.5A
Fan for battery cooler (1.5-3W) 12.5V / 0.5A
All Data given is based on a 12.5V car battery voltage.
Recommended battery size: 12V/> 90 Ah, min. 12 V/ 63 Ah
Tolerances at Pack 1/2 currents: typ. 5%; max. ~15% or 250mA (larger value counts)
Tolerances at Pack 3 currents: typ. 5%; max ~10% or 100mA (larger value counts)
T Gnd
100 mAh
~ 100 - 1500mA
~ 1.5V / cell
Temperature sensor: steps of 2°C
- - -
issue 09.01, page
isl 8 chameleon high end
27. Standard setup charge-/discharge programs
pack 1
pack 2
pack 3
D current
C current
Cut off
C/D Quantity
C Time
Number of Cells
auto C
auto L
fix C
[*] not selectable
Mains Power Supply/CarBattery
Full/Empty Light Output
5 (buzzer ON from device number 7628 and higher)
isl 8 chameleon high end
issue 09.01, page
isl 8 chameleon high end
issue 09.01, page
28. Menu-Tree-Structure
Curve display
0: powerOn
f1: data
f2: pack 1 curve
f3: pack 2 curve
f4: pack 3 curve
f5: isl8 params 1
0.2: pack 1 curve
f1: ventilator ON/OFF
f2: pack 1 params
f3: pack 2 curve
f4: pack 3 curve
f5: pack 1-3 state
0.3: pack 2 curve
f1: ventilator ON/OFF
f2: pack 1 curve
f3: pack 2 params
f4: pack 3 curve
f5: pack 1-3 state
0.4: pack 3 curve
f1: ventilator ON/OFF
f2: pack 1 curve
f3: pack 2 curve
f4: pack 3 params
f5: pack 1-3 state
0.5: isl8 parameters 1
f1: carbattery undervoltage
f2: cut-off temperature
f3: mains/car-battery switch
f4: melody choice
f5: menu i8params 2
isl 8 - device parameters 1
Battery parameters
0.2.2: pack 1 parameters
f1: max. discharge current
f2: program choice
f3: max. charge current
f4: cut-off automatic choice
f5: menu p1param2
0.3.3: pack 2 parameters
f1: max. charge quantity
f2: charge current choice
f3: charge program choice
f4: cut-off automatic choice
f5: max. chargetime
0.4.4: pack 3 parameters 1
f1: number of cells
f2: discharge current
f3: charge current
f4: program
f5: menu p3param2
0.5.5: isl8 parameters 2
f1: light-output blink/continuous
f2: set date
f3: set time
f4: set name
f5: isl8 state display
Device parameters 2
0.1: data
f1: buffer and memory
f2: pack to buffer assignment
f3: copy buffer to memory
f4: transfer to LCD and/or PC
f5: standard values for f2
pack to buffer assignment
(p1->b1, p2->b2, p3->b3) pack 1 parameters 2
f1: number of cells
f2: max. charge quantity
f3: max. charge time
f4: program after Power On Reset
f5: refresh ON/OFF
0.1.1: resolution
f1: *buffer1 (show function)
f2: *buffer2 (show function)
f3: *buffer3 (show function)
f4: *memory (show function)
f5: charge/discharge standard
values pack 1 - 3
(see Chapter 26)
0.1.2: assignment
f1: pack 1 to buffer?
f2: pack 2 to buffer?
f3: pack 3 to buffer?
f5: standard (p1->b1, p2->b2, p3->b3)
0.1.3: copy
f1: buffer 1 into memory
f2: buffer 2 into memory
f3: buffer 3 into memory
f5: standard (buffer1->memory) A3Param2
f2: max. charge quantity
f3: max. charge time
f5: refresh ON/OFF
Data storage / Data transfer
0.1.4: transfer
f1: buffer/memory -> LCD
f2: buffer/memory -> PC
f4: standard (memory->LCD)
f5: standard (memory->PC)
isl 8 chameleon high end
issue 09.01, page
isl 8 chameleon high end
issue 09.01, page
29. New features in version 4.xx
Our software has remained unchanged for a long period, but we can now offer a new version which
features many of the ideas and wishes which our customers have expressed to us. However, space
in the memory of the program EPROM is limited, so we have had to exclude some of those ideas.
Even so, we are sure you will agree with us that the results are impressive. Here are the new features:
The voltage resolution of the Battery 3 output has been improved; this makes it possible to
increase the maximum level of charge pushed into the pack. The maximum value is now
virtually 100%.
The temperature display is also much more sensitive and therefore more accurate, with increments of one degree Celsius.
The maximum charge and discharge current for the Battery 1 output is now 8 A (manual
charge current selection) and 10 A (fully automatic charge current selection).
The -2LE and -3EL programs have now been discontinued, and are superseded by the facility to pre-select 1 ... 5 charge and discharge cycles at the Battery 1 output. The program
with 5 charge/discharge processes is indicated by an ”X” instead of the numeral 5, and offers a special feature: if, during the discharge process, the unit detects that the last discharged capacity is lower than the previous discharged capacity, it is clear that the cycling
process is not increasing the pack’s capacity, and the cycle is therefore halted. If an -XEL
program is in progress, the battery is still fully charged when the cycle has been halted. In
each case the number of cycles is set in a sub-menu (program ->fixDC/fixCD/ autoDC/
autoDC -> 1 ... 5) of the combination program menus. The number of cycles you set applies
to all the four programs listed above.
The isl 8 now stores the owner’s name in three locations. This means that the inversion of a
single bit in memory no longer invalidates the stored name, as error correction is possible if
individual letters in the name become corrupted and illegible.
The Battery 2 output now features separate adjustment facilities for program selection (program -> fixC and autoC) and charge current (C-curr -> 0.25A ... 5.0 A).
It is now possible to configure 12 ”ready-made” charge/discharge programs each separate
for the Battery 1 and Battery 2 outputs. You can store one of the 12 configurations using the
menu point (program -> save -> 1 ... 12 -> name) with a self-made name (6 characters
long) for this configuration. Using the menu point (program -> recall -> 1 ... 12) you can
read one of the 12 stored configurations. If you select a number which does not correspond
to a ready-made configuration or saved data are not valid (data are not multiple saved), the
program jumps back to the current menu with a multiple beep to warn you of the error.
Data is stored in the following menu points: D-curr, C-curr, program, cutoff, refresh, No. of
charge/discharge cycles, QUANTmAh, TIMEmin.
The lead-acid charge program is now available at the Battery 2 output; this means that a
protracted lead-acid charge process does not prevent you using the discharge facility at the
Battery 1 output. Of course, you can still discharge lead-acid batteries at the Battery 1 output. The values for charge quantity and charge time limit for lead-acid batteries are stored at
different memory locations, which means that you can set different limit values for Ni-Cd /
Ni-MH batteries and PB batteries (already implemented in Version 3.75).
The display of discharged capacity which is removed from the car battery is now no longer
reset every time you connect the isl 8 to the car battery. Instead the reset only occurs automatically if the unit detects a change of date when you re-connect the charger. The point of
this change is as follows: if your car battery at the flying site is of relatively low capacity, you
can avoid wasting energy by disconnecting the isl 8 between charging processes, without
losing the ability to check the total discharged capacity at the end of the day. If you operate
the isl 8 from a mains PSU in the meantime (we only recommend this option with the use of
our NT40A PSU) and you switch the isl 8 from car battery mode (Batt) to mains PSU mode
(for example N299W), the charger stops calculating the total discharged capacity, but does
not erase the stored data. When you subsequently switch back to battery mode, the unit
resumes its measurement of the discharged capacity. You can erase the total discharged
capacity manually in the same menu (i8Param1 -> mns/bat) using the menu point BatRes
(Battery discharge quantity Reset, above Batt).
29.10 The owner’s name entered in the charger is now password-protected. If you now attempt to
change the owner’s name and press enter, the unit asks you to enter the stored password.
As supplied, the charger accepts the password "keyword". The unit always suggests this
password, and you should change it as soon as possible to make it impossible for unauthorised users to change your stored name. The charger expects a name with 7 characters
(which can include the space character). It differentiates between capital letters and small
letters, and also accepts numerals and special symbols.
When you have entered the correct password, you can then change that password by
pressing the f5 button (New-Pass (instead of enter)). To exclude the possibility of errors
when entering the name, the isl 8 asks you to enter it twice. You have to enter the new
password twice, i.e. the password must be entered one time in the NewPass1 menue and a
second time in the NewPass2 menu - every time confirmed by pressing enter.
Memorise the name carefully. If you forget your password, we can restore it at the factory,
but only if you can prove that the charger you sent to us is actually your property. The easiest way to convince us of this is to enter the charger’s serial number on the guarantee card
when you purchase the unit, and send it in to us.
To see the charger’s serial number, connect the unit to the car battery and press the f5 button three times.
Minor improvements:
When the charger has detected that the pack at the Battery 3 output is full or empty, the
screen displays the charge termination voltage (as with Battery 1 and Battery 2) instead of
the current pack voltage.
The calibration (”thinking”) interval, which used to occur before a discharge process started
at the Battery 1 output, has now been discontinued, as it has been replaced by a dynamic
calibration process.
The dynamic calibration process has also eliminated an earlier problem: when extremely
deep-discharged cells were discharged at the Battery 1 and Battery 2 outputs, the battery
voltage was displayed incorrectly; this is now not the case.
Previous versions of the software produced inaccuracies in the value for current which was
passed to the PC when transferring data in graph form from the isl 8’s internal memory to
winsoft, but this has now been much reduced by the adoption of an improved data compression process.
When you initiate a discharge program, the charger emits a longer beeping sound in order
to differentiate the process from the charge programs. The purpose of the new beeping pattern is to remind you that you may have started to discharge the battery by mistake, perhaps by selecting the wrong program.
isl 8 chameleon high end
issue 09.01, page
A shortage of program memory has made it impossible to implement the following features:
a ...
automatic commencement of charging or discharging using the internal clock.
However, we are working on an alternative version of the software which includes this feature (it is already implemented in the eco-charger). This will be possible by omitting the
lead-acid battery charge program.
b ...
a POR-Prg menu for Battery 2 and Battery 3 (for Battery 2: use one of the 12 configurations)
c ...
the facility to correct the number of cells for the Battery 2 output.
(To be precise: this menu point has been omitted due to the expansion of the program select and storage facilities.) However, there is no drawback to this change - apart from the
transfer of the exact number of cells to winsoft.
d ...
voltage indices on the Y axis.
We have also not implemented a program for charging Li-ion batteries. At present the accuracy of
the voltage display is not good enough to cope with the highly sensitive Li-ion cells, and this means
that they could be damaged by overcharging.
30. Character-table for name and password input:
..../0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U
V W X Y Z [ Y ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } > < space !
“ # ä ö ü ° ( ) * + , - . / 0 1 2...
issue 09.01, page
isl 8 chameleon high end
31. Standard ready-made configurations of version 4.xx
The 2 x 12 pre-set configurations are not available if you have upgraded the charger
yourself, i.e. if you have installed an exchange program Eprom yourself at home.
Of course, you still have the option to transfer all these settings manually from the table printed below.
If you have your own ideas about configuration names (e.g. you wish to use the name
of the battery), or if you wish to alter the order of the configurations, you can certainly do
this exactly as you wish within the limits of the software's facilities. For example, to copy
a particular configuration to a different number, simply read in the configuration with the
old number, then store it under the new number. Only the name has to be altered.
For the factory settings listed below there is no automatic correction facility for inverted
bits in the memory. As a result changes in the configuration may occur by themselves in
rare cases.
10 A
5.0 A
10 A
2.5 A
2.5 A
3.0 A
2.0 A
1.0 A
10 A
2.5 A
10 A
2.5 A
5.0 A
5.0 A
2.5 A
1.0 A
0.6 A
3.0 A
2.0 A
1.0 A
0.6 A
1.5 A
1.2 A
isl 8 chameleon high end
issue 09.01, page
32. Installing a software-update Eprom:
As soon as we have completed a new version of the software which includes significant improvements over the previous version, we will inform you by letter. If your charger is less than
one year old, you will automatically be sent the new software version at no cost to you.
Of course, for this system to work you must fill in the guarantee card and send it in to us!
If you have received an Eprom (multi-pin chip) from us, please...
• Ensure that any static charge in your body is dissipated before you touch the Eprom.
• Disconnect the isl 8 from its power supply and unscrew the three cross-point screws.
• Open the case by lifting the front; there is a rubber seal on the underside at the rear, and
you will need to squeeze it tightly to compress it.
• The old Eprom (there is only one in the charger; it is the chip with the silver sticker) can
now be levered up and out of its socket using a screwdriver. Work carefully, raising the chip
evenly left and right, and take care not to tilt it to the rear, as this will bend the pins out of line.
The best method is to slip the blade of the screwdriver into the slot between the Eprom body
and the socket, working from the side of the charger where the auxiliary socket row is located.
• Ensure that the distance between the two rows of pins matches the spacing of the Eprom
socket. If we have not already done this, you will find that it is usually necessary with new
Eproms to bend the pins inward slightly until they are at right-angles to the chip body. This can
be done simultaneously for all pins on one side by laying the pins flat on a table, so that the
chip's body is standing up at an angle, then bending the body over further until it is vertical.
Important: ensure that you simply increase the angle of the bend at the existing "elbow"; don't
bend them where the pins start to taper!
• The new Eprom can now be placed lightly in the socket, the same way round as the old
Eprom; note that the notch on one end of the Eprom body must face the square micro-processor. Check that all the pins are located in the correct position, between the pairs of metal contacts in the socket, then press down firmly to engage it; usually you will hear the pins "crunch"
into place.
• Check briefly that the charger is working by connecting it to the car battery (or - preferably
- a current-limited 12 ... 13.8 V mains PSU). If the screen does not immediately show the usual
Power-On display, disconnect instantly and check the installation of the Eprom (see previous
paragraph)! If you install the chip the wrong way round, it will be ruined. Guarantee invalid!
• If you previously disconnected the cable to the cooling fan and the loudspeaker, re-connect
the cable now, with the brown or black wire facing the sockets for Battery 3. If your charger
has a loudspeaker, the connector will be at a slight angle; this is deliberate due to space restrictions in the case, and must be maintained.
• Re-assemble the charger by reversing the procedure
outlined above, i.e. first push the grommet and power cable
into the slot in the case, place the rubber seal on the internal side of the heatsink, and press together firmly, at the
same time sliding the bottom part of the case forward under
the case cover. Don't forget to fit and tighten the three
isl 8 chameleon high end
issue 09.01, page
If your charger appears not to work as you expect it to, please run through the measures
outlined below step by step before assuming that it is faulty.
Only if you have completed all these checks, and the problem is still present, ring on our
hotline for technical advice. Even better, fill in the service questionnaire (next page) and send
or fax it to us. We will then ring you back with advice.
From long years of experience with our battery chargers we know that most problems do not arise if the points listed below are followed to the letter.
If we receive your charger but can find no fault with it ("no fault found") - which
usually means that the measures described below have been ignored - please note
once again that we incur costs in checking the unit, and that those costs are payable
by you even if the charger is within the warranty period.
1. Connect the charger to a fully charged car battery with a capacity of at least 60 Ah. Do
not use a mains-powered Power Supply Unit!
isl 8 chameleon high end , annex measures
Dear customer,
2. For the power supply to the charger use only the original cables and terminal clips.
Connectors such as wander plugs, car cigar lighter plugs etc. are not suitable! If you have
made changes, kindly restore the original cables and clips. Take care to produce sound soldered joints - no "solder blobs" or dry joints, please!
5. If you observe Points 3) and 4) and connect a discharged battery to the charger, the fully automatic charge mode should set a current of at least 1C, usually as much as 2C, after
about 5 - 10 min-utes. If this is not the case, then the internal resistance of the battery is probably excessive. In short, your battery has "had it", or is not suitable for rapid-charging.
6. Ensure that there are no defective cells in the battery pack. Bad cells usually heat up
early in the charge, and then cause the charger to switch off prematurely, and/or to set too
low a charge current in automatic mode.
isl 8 chameleon high end
4. Just as important as the charge cables are the connectors attached to them. Use the
proven 4 mm gold-contact connectors at the charger end (don't use expensive wander plugs).
Your flight packs should already be fitted with gold-contact connectors. Tin-plated connectors
are completely unsuitable as their transfer resistance is high and they are prone to intermittent
contact. Be sure that your cables are well soldered to the plugs and sockets. Do not fasten
with screws.
issue 09.01, page
3. Charge cables for all batteries should have a conductor cross-section of 2.5 sq mm. The
charger's automatic current setting circuitry is only capable of setting a suitable (i.e. high)
charge current for your battery if the cable is of this cross-section. Give the automatic circuit a
fair chance!
7. If the 3-hour limit is exceeded when you are charging from the Akku 1 or Akku 2 output
in automatic mode, then something is wrong with your charge cable, your connectors or your
battery. Perhaps too small a cross-section in the charge cable? Connectors not good-quality
gold-contact types? Dry solder joints? Battery ready for the bin, or not designed for rapidcharging?
Establish the reason! Attempting to alter the 3-hour time limit is not the way forward, as in
most cases a charge period of one hour already indicates that something is amiss. After 5 10 minutes the automatic circuitry should have set a charge current of at least 1C!
issue 09.01, page
8. Have you read the information in Chapter 1 (Warnings) and 2 (How to obtain reliable,
trouble-free operation) and observed the recommendations?
Form can be sent alone for technichal assessment/advice but must be sent with
any repair!
Usage (Tx, Rx, Propulsion)
Number of cells / Voltage
Cells soldered/welded/clamped
Charge lead connector
Your Data:
8cells / 9.6V
audio type
Power Source:
Malfunction during AC/DC operation:
Data: Voltage/Amps
Malfunction during DC operation:
Capacity car battery
Power 150
13V / 11A
45 Ah
Output used
Program used
Max. current (at automatik:)
Current at/before error
Charge time
Battery temperature
Error code
isl 8
auto C
133 min
# 52
isl 8 chameleon high end
Original <xyz>
4mm gold
issue 09.01, page
Charge lead:
Cross section
Connectors to charger
isl 8 chameleon high end , annex questionaire
Please fill out the form completely and as precisely as possible:
Descriptions of malfunction / Comments:
issue 09.01, page
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