Neware BVIR is a high-precision battery internal resistance tester, is specially designed for rechargeable battery(including lead acid, Ni-Cd, Ni-MH, Li-ion, Li-polymer battery).
Neware BVIR is easy to operate, reliable and highly cost-effective.
The alternating r.m.s. voltage Ua shall be measured while applying an alternating r.m.s. current Ia at the frequency of 1.0kHz±0.1kHz to the battery for a period of 1s to 5s. The internal a.c. resistance Rac is given by Rac = Ua / Ia.
Above testing method is indicated in many IEC testing manuals applied to various kinds of battery.
Newell BVIR is portable and it has a large capacity lithium-ion battery embedded. Moreover, an USB port is provided to charge and delivery testing results.
Testing method: 4 probe method(Kelvin connection)
Data storage: up to 100,000 items
Voltage measuring range: 0-20V
Voltage accuracy: ±0.1% FS
Internal resitance measuring range: 200mΩ-2000mΩ
A/D mode: SAR 12-bit succesive comparsison method
Testing frequency: 1KHz
Sampling frequency: 1000 times/s
Zero point calibration: calibrate voltage and internal resistance at the same time
Voltage calibration: use outer DC 3V-20V as a standard referene to calibrate voltage
Internal resistance calibration: use 10mΩ-2000mΩ precision resistance to calibrate internal resistance
VBIR shipped with matching probes, shown as in the following picture.
And you can read this article for more information of the buttons and screen illustration of BVIR: button-explanation-of-bvir