Kalibrierung des ZB2L3 v2.3 und anschließende Überprüfung der Meßgenauigkeit

Dieses Video zeigt die Kalibrierung des ZB2L3 v2.3 und die anschließende Überprüfung der Meßgenauigkeit:

Eine von mir aktualisierte und überarbeitete Gebrauchsanweisung auf englisch in einer Vorabversion folgt, die fertige Version als auch eine deutsche Übersetzung werden in den nächsten Tagen hier gepostet:

Manual for the ZB2L3

The latest version is v2.3, bought in August, 2018.

Intentional use

Measuring of battery capacity

Mode of operation

A battery is connected to the two connectors on position 2 and 3 with plus to 2
and minus to 3, while a resistor circuit is connected to 1 and 4.

     +---ZB2L3 v2.3---+
1 <= *   +---------+  |
2 <= *   | DISPLAY |  |
3 <= *   +---------+  |
4 <= *     # # #      =   <= USB connector

Connectors are shown as stars, the OK, - and + buttons are symbolized by #.

1 - Resistor circuit
2 - battery, plus
3 - battery, minus
4 - Resistor circuit

The device is switched on by connecting USB power (5V) to the USB micro connector on 
the right hand side.

External load resistor: The resistors which come with the device have a nominal power 
of 30W. Nevertheless these may become extremely hot although staying within the limits 
of specification! It is recommended to use high power resistors of at least 100W and 
mount these to aluminum heat sinks.

Power supply voltage: DC 4.5 through 6V (micro USB socket)

Working current: less than 70mA (this is the internal circuit, not the outer resistor 
circuit or the battery circuit)

Measured battery voltage: 1.00V through 15.00V, resolution 0.01V

Automatically selected termination voltage, depending on the initially charged cell 
voltage. Range: 0.5 through 11.0V.

Maximum current 3A, resolution 0.001A

The maximum measurement error voltage: 1% +- 0.03V

The maximum measurement error of current: 2% +- 0.010A

The maximum battery capacity range: 0.001Ah through 9999Ah (values lower than 10Ah are 
displayed as X.XXX; values between 10Ah and 99.99Ah are displayed as XX.XX, and so on).

Board size: 50mm long by 36mm wide, by 17mm high, including standoffs

Note: in order to improve the voltage measurement accuracy, the circuit applies 
a DC bias. The display may show a small residual value, which does not affect the 
actual measurement.

Usage instructions

The battery to be tested should be fully charged first.

Connect the battery observing the polarity (+ terminal on the PCB to 
positive battery terminal). Reversing the polarity may damage the circuit! 
Connect the operating power to the tester via the micro USB cable. The display 
should indicate the battery voltage.

Start test by pressing the OK button. The tester will automatically set suitable 
termination voltage, according to the battery full charge voltage, and flash it 
3 times upon starting the test.

The termination voltage chan be changed in 0.1V increments after starting the test, 
by pressing the + or - keys. The termination voltage is displayed with a leading 
P character. During testing, the electronic switch connects the load resistor, and 
the testing data are displayed in sequence, as shown by the LED indicator:

the integrated capacity (Ah)
momentary discharge current (A)
current battery voltage (V)

When the battery voltage reaches the termination voltage, the tester cuts off the 
load control switch, displays the capacity (Ah) and rapidly flashes the corresponding 
LED indicator. Press OK to terminate flashing. Press the OK button again and return 
to power on state, so that another battery can be connected and tested.

Error codes

battery voltage above 15V

battery voltage lower than termination voltage

battery is unable to withstand the discharge current 
(either internal battery resistance or cable resistance is too high)

current above specification (higher than 3.1A)


Simultaneously apply USB power and press all three buttons at once to enter the 
calibration mode and perform the following steps:

1. Display: 0u0A
Short connect both positive and negative input terminal (2 and 3) and press the 
OK button!

2. Display: J10u
Apply 10.00V DC between connectors 2 and 3 and press the OK button!

3. Display: J2.0A

Apply 2.0 A DC current between the input terminals and press the OK button to 
complete the calibration.

To achieve this, please, remember:

Maximum voltage : 15.0V
Desired current : 2.0A
Resistance should be: 7.5Ohm 

If you e. g. use a 4Ohm resistor, you should set the tension to 8V, so that 8V/4Ohm=2A. 
But the current should under all circumstances be measured with an external amperemeter 
as accurately as possible.

If the tester determines that the calibration data is reliable, it will in turn show 
four calibration numbers after completing the procedure; otherwise it will ignore the 
calibration attempt, discard the data, and exit the procedure.

Shipped contents:

2x 5W 7.5Ohm resistor
1x Battery capacity tester board
(USB cable is NOT provided)