Download gaus charge-discharge tester gcdt250a12v

CHARGE-DISCHARGE TESTER
GCDT250A12V
USER MANUAL
Belgrade, July 2003.
1. TABLE OF CONTENTS
1. TABLE OF CONTENTS ......................................................................................... 2
2. GAUS CHARGE-DISCHARGE TESTER GCDT250A12V ................ 3
3. TECHNICAL SPECIFICATIONS ...................................................................... 4
4. LCD Display ................................................................................................................... 5
4.1. Hierarchy of menus in GCDT .......................................................................................... 5
4.2. Setting mode ..................................................................................................................... 5
4.3. Main screen (display) ....................................................................................................... 6
4.4. The list of all the messages GCDT is able to register while operating ............................ 7
5. INSTRUCTION FOR USE ..................................................................................... 8
5.1. Charge .............................................................................................................................. 8
5.2. Discharge .......................................................................................................................... 8
6. DEVICE SETTINGS.................................................................................................. 9
6.2. STARTING CHARGE ..................................................................................................... 9
6.3. STARTING DISCHARGE TEST .................................................................................. 10
7. ALGORITHM .............................................................................................................. 10
7.1. CHARGE ALGORITHM............................................................................................... 10
7.2. DISCHARGE TEST....................................................................................................... 11
8. LEGEND OF MARKS (SIGNS) AND CONCEPTS .............................. 12
8.1. Default values, ranges .................................................................................................... 12
9. PRECAUTION MEASURES .............................................................................. 13
10. FIGURES ..................................................................................................................... 14
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2. GAUS CHARGE-DISCHARGE TESTER GCDT250A12V
GCDT250A12V is microprocessor device for charging, maintenance and testing lead-acid
12V batteries. It is developed as a consequence of need for small, easy for use, safe, reliable and
relatively cheep device for servicing and maintenance of starter batteries. GCDT is transformerdiode charger with resistance for testing the start capability. Charge regime is automatically
selected depending on level of emptiness of battery or on conditions in main supply. Charging is
realized by combining 4 phases (2 phases of intensive charge, recharge phase, “maintenance”
phase), voltage, current, duration and capacity are controlled and many precaution measures are
implemented (figure 5.).
Device is microprocessor, with measuring current, voltage, temperature of heat sink of
rectifier diodes and energy transformer, so it is possible to implement different algorithms. It
is possible to change voltage and current limits, conditioning of charge characteristic,
pausing, waiting for event (measuring Ah during charge), conditioning end of charging,
connection with PC computer, analyze and printing charge and discharge graphs etc.
Thanks to voltage limit, it is possible to charge without surveillance, because there is not
over charge (over night or during weekend). As well, in a case of main power failure during charge,
after it’s returning device automatically continues charging with parameters which were previously
set (before power failure). Discharging is dissipative with indication of current, voltage, elapsed
time and dissipated capacity. LCD display with 2x16 characters shows values of current, voltage,
time, capacity, warnings, wrong actions etc. Device is placed in red plasticified steel box with PVC
distancers and handle. Main switch, start (scroll) and stop (select) buttons, switches C/D
(Charge/Discharge) and R/S (Ready/Set), led diodes, LCD display for indication and connector for
communication with PC computer are placed on the devices front panel (figure 1.). Charge and
discharge cables and connectors (de montage-figure 3.), power supply cable, automatic fuse in DC
circuit of charger, fuse in AC circuit and holders for cables are on the back panel of device (figure
2, figure 4.).
With software GCDTS v1.01 (figure 6,7,8.) it is possible to connect device with PC
computer via RS232 serial port. Software gives opportunity of showing charge and discharge
graphs in real time, possibility of reading charge and discharge data in case that device wasn’t
connected with PC, printing and storing the results, creating reports etc.
Discharge resistor value is chosen in a way to achieve 250A from battery when voltage on
it’s ends is 10V (0.04R). LCD display and sound signalization help discharge operation by
stopwatch and beeping each 5 sec, as well as by freezing last discharge values (at the end of
discharge test). After finishing discharge operation, user could read on LCD display complete
memorized results of discharge test (values of voltage, current, capacity for each second during
test).
Gaus Charge-Discharge Tester GCDT250A12V has following protections:
1. No sparks during connecting or disconnecting plugs from battery in charge operation
2. Forced air cooling
3. Control of a minimum of allowed connected battery voltage (forbidden start for voltages
less than 2V)
4. Temperature protection on heat-sink of semiconductor energy components
5. Temperature protection of energy transformer (bad conditions in main supply)
6. In case of main power failure, after its restoring, charging automatically continues with
earlier set parameters
7. Slow fuse 4A 20mm in AC circuit
8. Automatic slow fuse 40A in DC circuit
9. Soft start circuit for energy transformer
10. Impossible start of charge and discharge simultaneously
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11. Short circuit protection (if detected current is more than 30A charger is automatically
turned off)
12. Over voltage protection
13. Protection from plugs (cables) falling during charge (freezing device until solving of
problem)
Please note:
Be careful about polarity of plugs in charge! In case of mistake, the only protection is
automatic fuse 40A, so there is a risk of permanent damage.
3. TECHNICAL SPECIFICATIONS
-Type of voltage converter: transformer-diode charger, resistance discharger
-Supply 230V +/- 10%, 50Hz 450W;
-Nominal input current:
2,5A
-Maximal start current:
3,5A
-Instruments: LCD display 2x16 characters, ampermeter 0-40,00A, voltmeter 0-20,00V, stopwatch
0-99sec, temp1 –99 do 99C, temp2 –99 do 99C
-Nominal charge current 22A (electronic control system permits current between 25A i 30A for a
max. of 5 minutes)
-Charge voltage: 17,2V (phase of intensive charge, choice from 14.4 to 18V), 16V (“maintenance”)
-Number of combinations of transformer windings in primer: 4
-Minimal charge voltage 2V;
-Dimensions (WxDxH): 245x460x160mm;
-Weight: 16kg;
-Cables with Pb plugs: l=1,5m, S=6/16mm2
-Ambient temperature: 0 do +40C
Please note:
-Easy changing of charging parameters and algorithm, possibility of communication with PC
computer…
Charger:
Current range
Voltage range
Charge voltage
Output power
Supply
Capacity
Resolution
Accuracy
Waveform of current
Power unit
Over current protection
Over voltage protection
Ŋ
Cooling
Control characteristic
Control variable
LCD display during charge
Discharger:
Discharge current
0-24A
2-18V
18V max,
For Ca-Ca bat. 17.2V, 16V (see algorithm)
For Sb Pb bat. 16.2V, 15.2V
370VA
Monophase 50Hz, 450W, 230VAC +/-10%
Charging of one 12V battery (six cells in serial
connection) from Cn=33Ah to Cn=210Ah
100mA i 25mV
Better than 10%
Full diode bridge
Rectifier diodes, transformer
30A
19V
75%
Forced air
Charger with voltage and current limit
Current, voltage, capacity Ah, time
Status, current, voltage, phase, Ah…
250A when voltage on resistor is 10V, duration
max 20sec, pause of min. 5min between two
successive tests
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LCD display during discharge
GCDT250A12V:
Display
Control elements
Housing
Dimension (WxDxH)
Weight
Time of discharging with resolution 0.1sec,
beep signal on each 5sec, freezing of last
measured values during discharge
LCD display with 2x16 characters
Main switch, start and stop buttons, switches
C/D and R/S, LED diodes
Steel red plasticified box
245x460x160mm
16kg
4. LCD Display
4.1. Hierarchy of menus in GCDT
4.2. Setting mode
Setting mode can be entered only while the device is in READY mode (charge or discharge
process has not been started). By turning R/S switch on the device turns into a setting mode and
yellow led diode is on. In this mode buttons STOP and START take new meanings such as
SCROLL and SELECT respectively. Navigation through menus is done by SCROLL button, by
pressing SELECT one can enter submenu. If there are not sub-menus, than SCROLL acts like an
increment of specific numeric values, and SELECT is used to confirm the set value. It is possible to
reach desired specific value even faster by constant pressure onto SCROLL button. At any point it
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is possible to turn setting mode off and return to READY mode by simple click onto R/S switch
when yellow LED diode turns off and the green turns on. All the previous done setting has been
saved.
4.3. Main screen (display)
The example of enlarged main screen:
C H R
0 0 :
2 A h 1 5 . 4 8 V
4 9 ! 3 < 1 4 . 3 A
6 .
3 1 :
The first three characters in the first line of LCD display show the condition of device and they can
be:
CHR -marks charge operation,
DIS -marks discharge operation,
FIN -marks finished operation,
PA
-marks the condition of pause during alarm,
RDY -marks ready condition after reset or at turning on the device.
The following 7 characters are reserved for capacity display. Second line begins with a clock
(altogether 8 characters for hours, minutes and seconds during charge process and 7 characters for
minutes, seconds and tenths during discharge process).
Ninth character of second line (such as exclamation mark) can be:
SPACE
-marks process with factory values,
!
-Marks process with user defined values,
P
-marks intensive charge phase (see charge algorithm)
Tenth character in second line is a number 0-4. It shows current active winding of a transformer
through which the charge current is realized. Zero (0) stands for OFF, number one (1)-winding with
the lowest charge current, number four (4)-winding with the highest charge current. The following
character might be:
SPACE
-the device has a tendency of stable current
<
-The device has a tendency of lowering the current
>
-The device has a tendency of increasing current.
Second line finishes with current info. Blinking the alarm message on the main screen shows alarm
conditions.
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4.4. The list of all the messages GCDT is able to register while operating
It shows while turning the switch on if the device is plugged (Power ON).
Right after turning the device it’s been checked whether it had turned off by pressing OFF button or by
power failure during charge process. If GCDT detects this situation the previous charge process continues
automatically.
When the user decides to set Voltage Limit & Charge Duration onto factory set values (17.2V & 24h), after
selected menu, GCDT informs him on the ending of this operation
If the user sets a new value to Charge Duration, after that charge process will be stopped (if it hasn’t been
stopped for other condition or manually).
If the user did not set new value to Charge Duration it would have a factory set value (24 hours). After that
time charge process would be stopped (if it had not been stopped earlier under any other condition or even
manually).
If the user set Capacity Limit (it had not been set in the factory), charge process would be stopped when the
battery gets a certain amount of Ah. E.g. Capacity Limit=66Ah will stop charge when the battery get 66Ah.
This message appears when the user manually stops charge process by pressing STOP button.
If START switch is pressed in discharge mode, the device expects battery connection for discharge process.
By disconnecting a load, the stopwatch automatically “freezes” with last measured current, voltage and
capacity values. When this message appears it is possible to continue discharge process by reconnecting the
load again (Cumulative Capacity).
This is a kind of alarm that happens when GCDT detects discharge current during charge process (user’s
mistake). At this stage charge process completely stops and discharge process is automatically activated.
Alarm, when a higher voltage battery has been connected. Charge start is not possible!
Alarm caused by a load disconnection, automatic fuse fail, and low battery voltage or cable disconnection.
By turning the alarm off charge will automatically be continued.
If charge process was started by user setting (not ones set by factory), this warning would inform him and
would give him an opportunity to give up.
If the transformer temperature is over 80C charge process will automatically be stopped. Start is not
possible at this stage. The charge process will automatically be continued when the temperature falls under
60C unless the user resets the device earlier.
If diode bridge heat sink temperature is over 80C charge process will automatically stop. Start is not
possible. The charge process will automatically be continued when the temperature falls under 60C unless
the user resets the device earlier.
Ambient temperature is too low. Start is not possible. If charge was on it would be stopped until
temperature exceed –15C. Then it automatically continues unless the user hasn’t manually reset GCDT.
Device will show this message if the last operation wasn’t discharge operation or if discharge lasted less
than a second.
After intensive charge phase is finished, regular charge process begins and timer is started (30 minutes). If
in 30min battery voltage doesn’t reach PVOLT LIMIT, the battery is considered damaged, charge process
stops and this message appears on the screen.
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5. INSTRUCTION FOR USE
5.1. Charge
Figure 1, figure 7.
1.
Turn the power supply socket on;
2.
Turn POWER switch on;
3.
An intro message will appear on LCD display and will be on for 3 seconds. After this
message the device will automatically continue charging process if it has already been on, or off by
power fail or by a violent switching off. In that case another message, from the previous list, will be
shown, charging process will be either continued or finished by pressing STOP button. If R/S
switch is in READY position (green READY LED diode is on) MAIN SCREEN will be shown on
LCD display and it is possible to read current battery voltage. If R/S switch is in SET mode (yellow
LED diode is on), it should be turned into READY mode. At this level some settings could be made
(that will be explained in the following text);
4.
Connect charger loads onto the battery in a right way. Red load connects onto plus pole, and
the black one onto a minus pole of the battery. PLEASE NOTE! Poles on the battery should be
cleaned and a load properly fixed. Should be kept in mind to choose a connection for charge;
5.
Turn C/D switch into CHARGE position (red LED diode CHARGE is on);
6.
By pressing START button the device will ask you to select one out of five capacity values
that are offered (see device setting). Selection is made by SCROLL button (STOP button), and the
set value is being confirmed by pressing SELECT (START button) once again, which starts
charging process;
7.
It is possible to follow charging process on LCD display (time that passed, charge current,
charge voltage, inserted Ah capacity, current active winding of a transformer through which the
charge current is realized, charge tendency as well as the process status and eventually appeared
irregular states caused by load disconnecting, warming-up etc.);
8.
It is possible to stop the charging process at any time by pressing STOP button.
5.2. Discharge
Figure 6, figure 8.
1. Switch the power supply socket;
2. Connect the black cable load marked by minus onto a minus pole of the battery. The red
cable load (exit Charge plus) must be disconnected from the battery.
3. Turn the POWER switch ON.
4. An INTRO message will appear on LCD display and will be on for 3 seconds. After this
message the device will automatically try to continue charging process if it has already been
on, or eventually off by a power fail. In that case another message, listed before, will be
shown and pressing STOP button should stop the process. If R/S switch is in READY mode
(green READY LED diode is on) MAIN SCREEN will be displayed on LCD display. If
R/S switch is in SET mode (yellow LED diode is on) it should be turned into READY
mode.
5. Turn C/D switch into DISCHARGE (red LED diode DISCHARGE is on).
6. By pressing START button the CONNECT DISCH message will be displayed. WAITING
CURRENT informs the user that another cable should be connected (contact needle on a red
DISCHARGE cable) onto batteries plus pole.
7. Connect the needle to plus pole of the battery by a very strong action to avoid sparkles. The
stopwatch will automatically be activated and measure discharge time.
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8. It is possible to follow discharging process on LCD display (time that passed, discharge
current, battery voltage, emptied Ah capacity). If it is not possible to see data on the display,
there is a programmed sound signaling system that can activate a buzzer at a certain time
intervals (see device setting). That interval was set at 5 seconds according to production
evaluation and could be changed if necessary. Discharging process should not exceed 15
seconds for it may cause device damage!
9. It is possible to stop discharging process at any time by disconnecting current needle from
battery’s plus pole.
Please note: Voltage values on LCD display during charge and discharge process are different
from those on battery loads (because of voltage drop on cables).
6. DEVICE SETTINGS
6.1. USER SETTINGS
Default settings – By this command all the original settings (set by a producer) are back. Charge
Condition – This is a group of conditions that can be given while charging.
Time Condition – is given when it is necessary to stop charger after specific time of charging
(default – 24h).
Capacity Condition – is given when it is necessary to stop charger after the set capacity is reached
during charging.
Voltage Condition – is used to set voltage limit that determines a voltage from which the charge
will start lowering the current, the point where it will pass into the recharging phase.
Buzzer Time – set the interval of time for buzzer signaling during the discharge test. (default – 5
sec). Since power load pressing moment, the buzzer will mark time interval to stop discharge
process, just in case it is invisible on display.
System Settings – This is a group of settings especially set only by producer or authorized and
skilled person. You need a password to enter.
Power Fail last process – This option shows the number of power fails during charge process.
Discharge Results in last test – There are results in last test in this menu. Results are arranged by
durability in sec. (20 sec. Max). They show the current and the voltage, written at a certain second
of a discharge test.
Please note: All settings, except for «System Settings», remain saved only till the first switching
off. The original settings are back after the following activation.
6.2. STARTING CHARGE
Certain settings have to be done regarding the way of charge when START button is
pressed.
User Settings Press Start – Warns the user that certain settings are changed so that
charge process will follow user’s settings. Charge process begins by pressing START
button. After certain time (while charging) “!” mark appears on the display, which means
that charge follows user’s settings.
Select Unconditional Capacity – This is option that gives user a possibility to
select unconditional charge regime. Option NONE skips this charge phase and switches
onto a normal battery charge. Every option that follows will start intensive charge phase.
Within this phase charge input capacity is given. Please note! No voltage and current limits
are applied in this phase (except for the alarm ones). Battery is charged without restrictions.
Only alarm conditions are important for this phase (alarm voltage and current higher than
30A). So the user has to precisely estimate which capacity will battery be able to accept
without overcharge or damage. There is a “P” letter shown on display during this phase.
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6.3. STARTING DISCHARGE TEST
This test is used to establish start capability of the battery and no setting is
necessary. By pressing strong discharge load onto battery’s plus pole – discharge test
automatically starts. Please note! It is not allowed to start battery while charging, minimum
5 min. pauses should be made and discharge test should not exceed 20 sec.
7. ALGORITHM
7.1. CHARGE ALGORITHM
Legend of marks from graph 1.
No.
Name with description
Mark
1.
Ih
12.8-24A
Il
4-15A
Uh
14-18V
17.2V
Ul
13-18V
16V
Vph
Vb
2-18V
13-18V
14.8V
Vs
Vp
Vr
13-18V
14-18V
Vr<Va
16V
17.2V
Va
15-19V
19V
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Phase of current regulation with higher
average value of charge current Io1
Phase of current regulation with lower
average value of charge current Io2
Phase of voltage regulation with higher
voltage limit Vp
Phase of voltage regulation with lower
voltage limit Vs
Voltage of connected battery (no load)
Break Voltage Limit (voltage level at
which higher set of current parameters is
changed with lower one)
Secondary Voltage Limit
Primary Voltage Limit
The highest value of charging voltage in a
phase of intensive charge
Alarm Voltage Limit (unacceptable level
of voltage
Alarm Current (unacceptable level of
current)
Maximal value of charging current in
current regulation with higher set of
current parameters
Optimal charge current in Ih
Minimal charge current in Ih
Maximal charge current in Il
Optimal charge current in Il
Minimal charge current in Il
Charge capacity
Charge capacity until entering in phase of
“maintenance”
Charge capacity in intensive phase (Ih+Il)
Charge capacity until reaching of Vb (Ih)
Moment of reaching Vb in intensive phase
Moment of exit from intensive phase
(current regulation)
End of phase recharging (5 cycles Vp)
Range
Default
values
Ia
30A
Imax1
24A
Io1
Imin1
Imax2
Io2
Imin2
Cf
Cu
12.8A
8A
15A
4A
1.5A
Cp
Ci
t1
t2
t3
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25.
26.
27.
End of phase of “maintenance” and end of
charging (5 cycles Vs)
Duration of time in voltage limit
Time interval of forbidden current
regulation after reaching voltage limit
t4
Dt1
Dt2
5min
30min
Charge process has four phases:
1. Intensive charge phase I with higher average value of charge current Ih. Voltage limits are not
considered in this phase (except alarm one). This phase includes current regulation with set of
higher current parameters (Imax1, Io1, Imin1). This phase ends if intensive phase capacity is
reached, or until reaching Vb (break voltage limit). Than device starts current regulation with lover
set of current parameters (Imax2, Io2, Imin2)
2. Intensive charge phase II with lower average value of charge current; this phase begins with
reaching Vb and ends when capacity for intensive phases is reached. Voltage limits are not
considered in this phase (current regulation with lower set of current parameters).
3. Recharge phase Uh; after finishing intensive charge phases, if in them is not reached Primary
Voltage Limit Vp device continues with current regulation (higher set of current parameters if Vb
is not reached, lower if Vb is reached). That lasts until Primary voltage Limit Vp is reached. Than
current regulation ends, begins voltage regulation, which tries to keep charge voltage on Vp. If
voltage exceeds Vp longer than dt1, current is lowering. Than device waits for another reaching of
Vp. If that doesn’t happen longer than dt2, device activates current regulation, which has to reach
Vp. This repeats in 5 cycles. After that device enters in phase “maintenance” with voltage level Vs.
4. ”Maintenance” phase Ul; this phase is similar to previous one except voltage level is Vs. After
5 cycles of Vs charging stops.
It is important to point out that charge process depends on many parameters and that
algorithm is made to cover wide spectra of real conditions as well as to be resistant for wrong
chosen parameters. Actual form of charging depends on battery condition, chosen capacity for
intensive phases, on conditions in main supply, on selected voltage limits (user settings) etc. Also,
ending of charge operation could be defined by user (duration or capacity from beginning through
intensive phases and others). Under all those circumstances, graph 1. should be analyzed
qualitatively with respect of numerous real situations, which couldn’t be easily descripted.
Please note: current alarm always controls. In this case, device tries to lower the current and
if that is not possible it stops charge process.
7.2. DISCHARGE TEST
This test is used to examine battery's start possibility. When starting, the device has
no discharge control. This is the way the user should pay attention to the following
conditions:
Discharge should last max. 20 sec, then 5 min pause is necessary to exhaust thermal
energy (fans to force the air), The test can be repeated right after. Discharge can be done
only on 12V batteries (not 24V or more). Battery poles should be cleaned, minus load
(black cable) that is used in discharge test should be fixed, red cable with current needle
should be strongly squeezed onto plus pole. Otherwise sparkling and bad contact could lead
to wrong results and additional warming up. «Discharge Results in last test» will give us all
the data on battery's condition.
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8. LEGEND OF MARKS (SIGNS) AND CONCEPTS
A-(Amper) current unit
V- (Volt) voltage unit
Capacity Ah – battery capacity unit
Charge (CHR)– Charge
Discharge (DIS)– Discharge
Set – Setting of parameters
Ready (RDY)– Ready for work (start)
Start – Starting process
Stop – Stopping process
Current – value of DC current
Buzzer – part for sound beeping
LCD Display – Display with 2x16 characters
Password – for skilled users
Voltage limit – value of charging voltage on which some action has to be done
Power failure – Main power supply failure
Finish (FIN) – Finishing operation
Pause (PA) – Freezing operation
Primary voltage limit – voltage level that is reached in a phase of recharging
Secondary voltage limit – voltage level that is reached in a phase of maintenance
Break voltage limit - voltage level at which higher set of current parameters is changed with
lower one
Alarm voltage limit – unacceptable voltage level
Alarm Current – unacceptable current level
Time Condition – time condition for charge ending
Capacity Condition – capacity condition for charge ending
8.1. Default values, ranges
Name
Primary voltage limit
Secondary voltage limit
Break voltage limit
Alarm voltage limit
Alarm Current
Capacity Condition
Buzzer time
Time Condition
Range
14-19V
13-19V
13-19V
15-19V
5-400Ah
1-10sec
1min-48h: 59min
Default
17,2V
16V
14,8V
19V
30A
100Ah
5sec
24h:00min
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9. PRECAUTION MEASURES
1. Please read the instruction for use and warnings;
2. To avoid electric shock, disconnect the cable and test cables from the battery
before taking the device cover off or before safety fuse change;
3. WARNING! Gases realized during charge process are explosive. Do not smoke,
avoid fire and sparkles;
4. Do not expose device to direct sun light, extreme temperature or moisture;
5. Device must be earth grounded;
6. Do not connect device to battery with nominal voltage different than 12V.
Connected battery voltage must be ranged 7 to 18 volts;
7. Do not connect the device on a battery that is in a vehicle. Charged or tested
battery should be outside any vehicle;
8. Always take into consideration the correct polarity while connecting the battery.
Red cable onto plus, black onto minus battery pole. Inversion polarity could lead
to permanent both device and battery damage;
9. Discharge test time should not exceed 20 sec. After each discharge test you
should leave the device on for at least 5 minutes, so that the fan could blow the
warm air out. The pause between two successive discharge tests should not be
shorter than 5 minutes. The load test should be made only when the loads are
fixed well;
10. Place the device to enable right flow of dissipated heat (do not cover ventilation
holes). Use the device only in a well ventilated areas. Avoid intensive warming
and battery «boiling» during charge;
11. Keep the device away from children;
12. Only skilled and qualified person can service the device.
GAUS StS-Belgrade, Jurija Gagarina 167/41, tel/fax: +381 11 17 69 142, mob. +381 63 215 722, serv. +381 25 461 095
www.gaus-sts.com
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10. FIGURES
GAUS StS-Belgrade, Jurija Gagarina 167/41, tel/fax: +381 11 17 69 142, mob. +381 63 215 722, serv. +381 25 461 095
www.gaus-sts.com
14
GAUS StS-Belgrade, Jurija Gagarina 167/41, tel/fax: +381 11 17 69 142, mob. +381 63 215 722, serv. +381 25 461 095
www.gaus-sts.com
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