One-Tool BT300 User manual

Battery Tester BT300
NOTES：
Carefully read the user manual before using, and keep it well for future
reference.
Carefully check the device parts list before using. For any doubt, contact
ONE-TOOL distributor immediately.
Due to the product upgrade, tiny difference between the user manual and
the device will not be further noticed. Take the device as standard.

Battery Tester BT300
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ONE-TOOL and its branches are not responsible for the fees and expense of the
device damage and loss due to private accident or from third party, misuse and
abuse of the device, unauthorized change and repair, or any operation and
maintenance not following ONE-TOOL standard.
ONE-TOOL is not responsible for device damage or problem due to the usage of
any optional parts or consumables instead of ONE-TOOL original products or
ONE-TOOL recognized products.
Declaration: Other product names mentioned in the user manual are aimed to
describe the device usage. The registered trademarks still belong to the original
company.
The device is for professional technicians or maintenance and repair personnel.
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Battery Tester BT300
Table of Contents
Chapter 1 Product Summary .............................................................................1
1.1 Product Profile ....................................................................................1
1.2 Product Function.................................................................................1
1.3 Technical Parameters..........................................................................2
1.4 Working Environment Requirement.....................................................3
Chapter 2 Tester Structure.................................................................................3
Chapter 3 Operation ..........................................................................................4
3.1 Pre-Test...............................................................................................4
3.1.1 Connect Tester ........................................................................4
3.1.2 Key Description.......................................................................4
3.2 Tester Startup.....................................................................................4
3.3 Battery Test.........................................................................................5
3.3.1 IN-VEHICLE or OUT-OF-VEHICLE .........................................5
3.3.2 Select Battery Charge State ....................................................6
3.3.3 Select Battery Type .................................................................6
3.3.4 Battery System Standard and Rating.......................................8
3.3.5 Battery Test Result ................................................................10
3.4 Cranking Test....................................................................................12
3.5 Charging System and Rectifier Diode Test........................................13
3.6 24V System Test...............................................................................16
Chapter 4 Daily Maintenance...........................................................................19
4.1 Eliminate Common Fault...................................................................17
4.1.1 Screen Not Light ............................................................................17

Battery Tester BT300
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Chapter 1 Product Summary
1.1 Product Profile
BT300 Battery Tester adopts currently the world's most advanced conductance
testing technology to easily, quickly and accurately measure the actual cold
cranking amps capability of the vehicle starting battery, healthy state of the
battery itself, and common fault of the vehicle starting system and charging
system, which can help maintenance personnel to find the problem quickly and
accurately, thus to achieve quick vehicle repair.
1. Test all automotive cranking lead acid battery, including ordinary lead acid
battery, AGM flat plate battery, AGM spiral battery, and Gel battery, etc.
2. Directly detect bad cell battery.
3. Polarity reverse connection protection, reverse connection will not damage
the tester or affect the vehicle and battery.
4. Directly test the battery with loss of electricity, no need to full charge before
testing.
5. Testing standards include currently the world's majority of battery
standards, CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, GB.
6. Support multi-languages, customer can select different language package,
which includes: Chinese Simple, Chinese Traditional, English, Japanese,
Russian, Spanish, French, Italian, German, etc. Other languages can also
be customized according to user's need.
1.2 Product Function
Main functions of BT300battery tester include: battery test, cranking test,
charging test and other additional functions.
Battery test is mainly targeted to analyze the battery healthy status to
calculate the actual cold cranking capability of the battery and the aging extent,
which provide reliable analysis evidence for the test and maintenance of the
battery. It notifies the user to replace battery in advance when the battery
getting aged.
Cranking test is mainly to test and analyze the starting motor. Through testing

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the actual required cranking current and cranking voltage of the starting motor,
it can find out whether the starting motor works fine. There are several reasons
why the starting motor is abnormal: lubricating system fault causing the
starting loaded torque increasing or rotor friction of the starting motor causing
the increasing friction of the starting motor itself.
Charging test is to check and analyze the charging system, including
generator, rectifier, rectifier diode, etc., thus to find out whether the output
voltage of the generator is normal, the rectifier diode works fine and the
charging current is normal. Suppose one of the above mentioned parts is not in
normal situation, it will lead to over charge or incomplete charge of the battery,
thus the battery will be quickly damaged and also greatly shorten the using life
of other loaded electrical appliance.
Additional functions include: Set language, voltmeter and screen brightness
adjustment.
1.3 Technical Parameters
1. Cold Cranking Amps Measure Range:
Measure Standard
Measure Range
CCA
100-2000
BCI
100-2000
CA
100-2000
MCA
100-2000
JIS
26A17--245H52
DIN
100-1400
IEC
100-1400
EN
100-2000
SAE
100-2000
GB
100-1400

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2. Voltage Measure Range: 8-30VDC
1.4 Working Environment Requirement
Working Environment Temp.: -20°C-60°C
It is applicable for automotive manufacturers, automotive maintenance and
repair workshops, automotive battery factories, automotive battery distributors,
and educational organizations, etc.
Chapter 2 Tester Structure
BT300 : battery tester main unit with testing cables.
BT300 Battery Tester main unit cover is made of ABS acid-resistant plastic.

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Chapter 3 Operation
3.1 Pre-Test
3.1.1 Connect Tester
Shake the clamps back and forth to make sure they are well
connected. Tester requires the two clamps are well connected with
the battery poles, otherwise, the test cannot go on. When enter the
battery test program, screen prompts "Check Connection", do clean
the poles and re-connect in the right way.
Tester has reverse connection protection function. When clamps are
reversely connected, tester screen will not light, but it damages
neither the tester nor the automotive load.
NOTE: For parallel connected batteries, break off the cathode
connection first, then do single test to each battery. Suppose
cathode connection is not cut off, there will be error in test result.
3.1.2 Key Description
● Up / Down keys
Select upwards or downwards via white UP and DOWN keys.
●Return key
Return to previous menu via blue RETURN key.
●Test key
Confirm the selection via green Test key

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3.3 Battery Test
After entering battery test program, tester displays the tester model
and version approx. 2 seconds, see figure 3.
Figure 3, Interface with tester model and version
Tester will display the following contents in a sequence, select
accordingly.
3.3.1 IN-VEHICLE or OUT-OF-VEHICLE
Press UP/DOWN key to select the battery location, in vehicle or out
of vehicle, then press OK key to confirm.
IN-VEHICLE means battery is connected with vehicle generator or
vehicle electrical appliance.
When surface charge detected by the tester, it prompts "SURFACE
CHARGE, TURN LIGHTS ON"
Turn lights on as prompted to eliminate battery surface charge,
tester will then display the following messages in a sequence:
BT300
Battery Tester
SELECT TEST
IN-VEHICLE
OUT OF VEHICLE
SURFACE CHARGE
DETECTED
TURN LIGHT ON
HEADLIGHTS ON

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Now the tester detects the surface charge has been eliminated, turn
lights off as prompted, then press OK key. The tester will recover
automatic test
OUT-OF-VEHICLE means battery is not connected with any of the
vehicle loaded, i.e. battery connection is cut off.
3.3.2 Select Battery Charge State
After selecting the battery location, tester will prompt to select the
battery charge state, i.e. Before Charge or After Charge.
Press UP/DOWN key to select battery charge state, then press OK
key to confirm. In this way, it ensures a more accurate test result.
In Vehicle, select Before Charge for Cold Vehicle and After Charge
for Hot Vehicle.
3.3.3 Select Battery Type
After the battery charge status selected, tester will prompt to select
battery type, i.e. Regular Flooded, AGM Flat Plate or AGM Spiral,
and Gel battery. Press UP/DOWN key to select battery type, then
TURN LIGHTS OFF

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press OK key to confirm.
When it's IN-VEHICLE test, battery installation way shall also be
selected, e.g. TOP, SIDE or REMOTE (This selection is no need for
OUT-OF-VEHICLE), then press OK key to confirm. REMOTE is
adopted for some in vehicle battery which is too tightly installed to
use the test clamps to connect the battery poles.

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NOTE: For REMOTE test, there will be a little tolerance. For any
doubt, take off the battery and select "OUT-OF-VEHICLE" to re-test.
3.3.4 Battery System Standard and Rating
BT300battery tester will test each battery according to the selected
system and rating.
Use UP/DOWN key to select according to the actual system
standard and rating marked on the battery. Use UP/DOWN key to
select according to the actual system standard and rating marked on
the battery. See in the below picture, the arrow indicated location.
CCA: Cold Cranking Amps, specified by SAE&BCI, most frequently
used value for starting battery at 0°F (-18°C).
BCI: Battery Council International standard
CA：Cranking Amps standard, effective starting current value
at 0°C

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MCA: Marine Cranking Amps standard, effective starting current value
at 0°C.
JIS：Japan Industrial Standard, displayed on the battery as combination of
the numbers and letters, e.g. 55D23,80D26.
DIN：German Auto Industry Committee Standard
IEC：Internal Electro technical Commission Standard
EN：European Automobile Industry Association Standard
SAE: Society of Automotive Engineers Standard
GB：China National Standard
Rating range as following:
Measure Standard
Measure Range
CCA
100-2000
BCI
100-2000
CA
100-2000
MCA
100-2000
JIS
26A17--245H52
DIN
100-1400
IEC
100-1400
EN
100-2000
SAE
100-2000
GB
100-1400

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Input correct test standard and rating, press OK key, tester starts to
test, and dynamic interface "TESTING" prompted. See below:
It takes around 3 seconds to display the battery test result.
3.3.5 Battery Test Result
Battery test result includes 5 types as following:
1) Good Battery
The battery is without any problem, please be relaxed to use!
NOTE: SOH means State of Health
SOC means State of Charge
SOH:96% SOC:98%
12.64V 490A
Rating 500A
GOOD BATTERY

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2) Good, Recharge
Good battery but low current, recharge before using.
3) Replace
The battery is near to or already reached the end of the using life,
replace battery, otherwise, bigger danger will be followed.
4) Bad Cell, Replace
Battery interior damaged, broken cell or short circuit, replace
battery.
5) Charge, Retest
SOH:78% SOC:30%
12.20V 440A
Rating 500A
GOOD, RECHARGE
SOH:46% SOC:80%
12.68V 340A
Rating 500A
REPLACE
SOH:0% SOC:20%
10.60V 0A
Rating 500A
BAD CELL，REPLACE

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Unstable battery shall be recharged and retested to avoid error. If
same test result appears after recharge and retest, the battery is
regarded as damaged, replace the battery.
Attention: If "Replace" resulted from IN-VEHICLE mode, it might be
the reason that vehicle cable is not well connected with the battery.
Ensure to cut off the cable and retest the battery under
OUT-OF-VEHICLE before making a decision to replace battery.
NOTE: After testing, if need to return, press RETURN key to directly
return to the startup interface.
After testing: if it's "IN-VEHICLE" test state, press OK key will bring
to Cranking Test.
3.4 Cranking Test
Tester prompts as following:
Starting the engine as prompted, tester will automatically complete
the cranking test and display the result.
Normally, cranking voltage value lower than 9.6V is regarded as
SOH:39% SOC:20%
12.08V 310A
Rating 500A
CHARGE-RETEST

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abnormal and it is OK if it is higher than 9.6V.
Test result of the tester includes actual cranking voltage and actual
cranking time.
When cranking test is abnormal, battery test result will also be
displayed at the same time.
This is for the convenience of the maintenance personnel to quickly
know the whole state of the starting system according to the data.
After testing finished, do not shut down the engine, press OK key to
enter Charging Test.
3.5 Charging System and Rectifier Diode Test
When enter the charging test, tester will prompt "Charging Test?"
Press OK key again to start the charging test.
NOTE: Do not shut down the engine during the test. All electrical
appliance and device are in OFF state. Turn on/off any electrical
appliance in the vehicle during the test will affect the accuracy of the
test result.

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Tester will do the following tests in a sequence:
For ripple test, tester will display the real time ripple and meanwhile,
shows ripple volt and charging volt values at the bottom line.
It takes approx. 6 seconds for the ripple test.
After the ripple test, tester will automatically start the loaded voltage
test.
Loaded Volt Test takes approx. 3 seconds, then it hints "Step on
accelerator to increase engine rotating speed"
Operate accordingly to increase the engine rotating speed to
3000turns or above, and keep for 5 seconds.
Tester starts the charging volt test after increase rev detected.
After the test finished, tester displays the effective charging volts,
ripple test result and charging test result.

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NOTE: If no increase rev detected, it shall be the fault of generator
regulator or connection with battery failed. Tester will try 3 times to
further detect, if still failed, it will skip the increase rev detect and
the test result displays "No Volt Output". See below:
Check the connection between generator and battery, then retest.
Charging Test Result:
1) Charging Volt: Normal
Charging system shows the generator output normal, no problem
detected.
2) Charging Volt: Low
Charging volt of the charging system is low.
Check drive belt of the generator whether slip or running off. Check
the connection between generator and battery is normal or not.
If both of the drive belt and the connection are in good condition,
follow the manufacturer's suggestion to eliminate generator fault.
3) Charging Volt: High
Generator output volt is high.
Since most of the vehicle generators are using internal regulator, the
generator assembly has to be replaced.(Some old style cars are
using external regulator, then directly replace the regulator.)
The normal high volt of the voltage regulator is maximum
14.7±0.5V.If charging volt is too high, it will overcharge the battery.
Therefore the battery life will be shortened and troubles will be
caused.

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4) No Volt Output:
No generator volt output is detected. Check the generator
connection cable and the belt whether they are normal.
5) Diode Test:
Through the test of charging current ripple, tester will find out
whether the diode is normal or not. When ripple volt is too high, it
proves at least one diode is damaged. Check and replace the diode.
Till now, all tests have been done.
3.6 24V System Test
Ordinary 24V battery group combines two 12V batteries in series
connection. Thus when testing 24V battery, tester will prompt "24V
Battery", divide the batteries and test one by one. It's not necessary
to break off the connection cable (Comparatively, the parallel
connected battery group must cut off the cathode connection), test
method is same as testing single 12V battery.
For 24V charging and cranking tests, connect the red clamp to the
anode of 24V battery group and the black clamp to the cathode of
24V battery group (NOTE: it's not the anode and cathode of the
single battery but battery group), select IN-VEHICLE, screen
displays "24V Battery", ignore the prompt, after 3 seconds, the
tester will skip battery test program and enter the cranking test
directly. Follow the method of 12V system test to complete the 24V
charging and cranking tests. The test process is same as 12V
system.
3.7 Additional Functions
3.7.1 Select Language
Through this option, user can select language according to his need.

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System contains multi-language package, which include Chinese,
English, Russian, Japanese, Spanish, German, French, Italian, etc.
After successful setup, it shows "OK" for 2 seconds, then return to
the previous interface.
3.7.2 Voltmeter
BT300Battery Tester can also be used as DC voltmeter.
The working range is 8VDC-30VDC.
CAUTION: BT300 Tester may be damaged when connected to
voltage above 30V!
This function can set the voltmeter On/Off at the bottom line of the
startup interface.
After successful setup, it shows "OK" for 2 seconds, then return to
the previous interface.
Chapter 4 Daily Maintenance
4.1 Eliminate Common Fault
4.1.1 Screen Not Light
Check connection with the battery whether it's well or reverse
connected.