Generally, there are 4 kinds of calibration of Neawre battery testing machines, Charge voltage, Charge Current, Discharge Voltage and Discharge Current, the calibration processes are all different. We begin with Charge Voltage calibration, if you get this one done, then it would be easier for you to handle the other 3 types of calibration.
For doing charge volate, you need a multimeter, a resistor, the proper resistor supposed to be greater than or equal to (2-10) x up-limit voltage of the machine/up-limit current of the machine, for example, if you are using a Neware BTS3000-15V3A, then the resistor supposed to be (2-10)*15/3=10-50ohm.
And of course, get our machine ready(power up).

Following picture tells you how to connect multimeter, test machine, resistance in charge volate calibration.
CV-Calibration

For a better reference, I took a picture of when I actually did the charge volate calibration, and remebmer: switch your multermeter to the voltage position, it's supposed to look like the following picture:
CV-Calibration

After you hooked up all the wires, you can start up the calibration software, switch to English UI if it's not, as I told you last time. Normally, the software will detect the neware machine connected with the computer(❷ you can see I'm working on a 5V3A machine), if not, click the search(❶)button on the toolbar to search the machine. After detected the machine successfully, the cali software will ask you to read the KB infromation from device, click 'yes'.
CV-Calibration

The KB information looks like this, and leave all the other options default:
CV-Calibration

Click Run button() and input the multimeter value into 'meter value'( ) and click the above 'auto input' button( ).
CV-Calibration

Then the value will be filled automatically and jump to the 2nd calibrating point.
CV-Calibration

Repeat the following step 1,2,3.
CV-Calibration

Then you can notice the following result:
CV-Calibration

Right click the above KB values, write channle KB to the channel you are calibrating(here I'm calibrating channel 4, so I choose channel 4).
CV-Calibration

And application will tell you, calibration successfully performed! Then you can calibrate other channels use the same method.
CV-Calibration

So far we finished the charge voltage calibration, hope you get it.

Preparation:

Connect the machine to computer with Ethernet port(Ethernet version) or Serial port(serial port version). 

Power on the machine, make sure the “BTS-TC” is shut down already and then execute the calibration software “BTS-Calibration” (These two can not run simultaneously). 

Wait until the computer finds the machine and displays the machine’s information. (If the computer can not find it automatically, click “search”) 

Right click the channel-read channel KB(R) before calibrate.

1. Firstly, let’s do the Charge Voltage Calibration: 

a.Please load the proper resistance for calibrating voltage in terms of the different resistance in distinct model of the BTS: 

Resistance  ≥ (2~10) X Full Scale Voltage(V)/ Full Scale Current(A) 

Power of Resistance  ≥ Full Scale Voltage(V)2 / Resistance(Ω) 

b.connect as below: 

Always let the probes of the multimeter well contact the channel when measuring. 

This is how you connect multimeter, channel and the resistance.

Step1.Select the right device and right channel under “device list”

Step2.Select the CV-Seg1 to calibrate Charge voltage. 

Step3.Click “Run”, you will see the dynamic measuring information under BTS information, and “Display value” is under “Set value”. 

*Set value: is the voltage at which you are calibrating (How to change it will be discussed later). 

*Show value: is the voltage measured by the machine. 

Step4.Use a multimeter(here we use FLUKE 187) to measure the voltage of the resistance, input the readout after “Multimeter Value”.   

Step5.click “Input”. 

Step6.Again click “Run”, the machine will be calibrated at the second measuring point. 

Step7.Again input the multimeter readout after “Multimeter Value”.

Step8.click “input” Finish Channal 1 charge voltage calibration. You can right click “CV-Seg1”and click ‘write channel KB(w)’to save the KB for CV calibration first, or you can wait until finish 4 type calibrate ,then right click CHN1 and click ‘write channel KB(w)’ to save the KB for channel 1. 

Now you have successfully calibrated one channel, now you can use the same method calibrate 'charging voltage' on all the other channels.

Charge Current Calibration

Note: If the current range of the BTS device doesn’t reach the top-limit current of the multimeter, then connect multimeter directly with the channel you are going to calibrate like the following picture:

But if the current range of the BTS device is over the top-limit current of the multimeter, then you should add a shunt in the circuit and connect multimeter with the channel you are going to calibrate like the following picture:


Step1. Select the right device and right channel under “device list” 

Step2. Select the CV-Seg1 to calibrate Charge voltage. 

Step3. Click “Run”, the machine will be calibrated at the first measuring point. 

Step4. Use a multimeter(here we use FLUKE 187) to measure the current, input the measure current after “Multimeter Value”.   

Step5. Click “Input”. 

Step6. Again click “Run”, the machine will be calibrated at the second measuring point. 

Step7. Again input the measured current after “Multimeter Value”. 

Step8. Click “input”.

Discharge Voltage Calibration

Resistance  ≥ (2~10) X Full Scale Voltage(V)/ Full Scale Current(A) 

Power of Resistance  ≥ Full Scale Voltage(V)*Full Scale Voltage(V)*/ Resistance(Ω) 

Range of Constant-current source  ≥ Full Scale Current(A) 

Constant-current source have to execute two workstep,step current are10% and 90% of Full Scale Current(A)of the device. 

Step1. Select the right device and right channel under “device list” 

Step2. Select the DV-Seg1 to calibrate discharge voltage. 

Step3. Click “Run”, the machine will be calibrated at the first measuring point. 

Step4. Use a multimeter(here we use FLUKE 187) to measure the voltage of the resistance, input the readout after “Multimeter Value”.   

Step5. Click “Input”. 

Step6. Again click “Run”, the machine will be calibrated at the second measuring point. 

Step7. Again input the voltage of the resistance, input the readout after “Multimeter Value”.

Right click “DV-Seg1”and click ‘write channel KB(w)’to save the KB for DV calibration.

Discharge Current Calibration

Step1. Select the right device and right channel under “device list” 

Step2. Select the DC-Seg1 to calibrate Discharge current. 

Step3. Click “Run”, the machine will be calibrated at the first measuring point. 

Step4. Use a multimeter(here we use FLUKE 187) to measure the current, input the measure current after “Multimeter Value”.   

Step5. Click “Input”. 

Step6. Again click “Run”, the machine will be calibrated at the second measuring point. 

Step7. Again input the multimeter readout after “Multimeter Value”. 

Step8. Click “input” 

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