Huazheng HZNZ-300 Portable Battery Internal Resistance Tester

I.Product Features
1.The instrument offers two modes of operation: color touch LCD screen and button operation. You can either directly touch the screen or use the buttons, making it simple to use with a clear process, meeting the needs of different users.
2.Data storage: The instrument supports both internal and external storage. The internal memory can store up to 999 sets of test data, with each set containing data for 500 batteries. It also supports data querying, analysis, and more.
3.Equipped with an automatic identification function to measure direct and reverse connections.
4.The instrument can record and query voltage, impedance, conductance, and capacity, making it easy to estimate the remaining capacity of the battery and perform other analyses.
5.The instrument includes an oscilloscope function, providing real-time graphical displays of the battery’s highest and lowest voltage.
6.The host computer features powerful data management software with a user-friendly interface, offering functions such as data management, printing, analysis, report statistics, and automatic generation of test reports.
7.Weighing no more than 0.5 kg, the handheld design allows for single-handed operation, enabling fully automated measurements.
8.Powered by a large-capacity lithium battery, it supports long-duration testing.
9.Small in size, extremely convenient, with a beautiful appearance, excellent workmanship, and a smooth, user-friendly interface.
II.Technical Index
Measuring range | Conductance:20~19,990S Impedance:0.01mΩ-120mΩ Voltage:0.000v--16v |
Minimum measurement resolution | Conductance:1S Impedance:0.01mΩ Voltage:1mV |
Measurement accuracy | Conductance:±0.5%rdg ±6dgt Impedance:±0.5%rdg ±6dgt Voltage:±0.2%rdg ±6dgt |
Power supply | 5V, Rechargeable lithium battery |
Power consumption | Standby for 10 hours |
Storage capacity | 8G TF card |
Liquid crystal | 800*480 true color 5-inch color touch screen |
Dimension | 160 x 110 x 42mm |
Weight | 0.5Kg |
III.Interface An Switch Description
Interface Description

Connection Instruction

During the test, do not clamp the test clip on the screw cap, which will affect the test accuracy, but can be clamped on the pole or the connection strip.
The reference impedance or conductance of the battery depends on the battery manufacturer. This parameter has a certain impact on the evaluation of the remaining capacity.
Battery Connection Diagram
Pole Test

This instrument has the function of accurately measuring the impedance of the battery. The connection method with the battery is as shown in the figure above:
Note: It is not necessary to distinguish the polarity of the test clip! (This instrument has bidirectional measurement function)
Connecting Strip Test

Step 1: Test the battery first

Step 2: Test the battery and the connecting strip again
This instrument has the function of measuring the resistance of the connection bar, but this function cannot directly connect the test clip to both ends of the connection bar for testing, and it needs to be connected to the battery, which is completed in two steps, as shown in the figure above:
Connecting Strip Test Method In Group Test

In the group test, when the "connection bar/connecting strip test" mode is selected, test the connection sequence of test clips 1, 2, 3, 4, 5 and 6 in the figure above. The meter will automatically calculate the impedance value and connection bar resistance value of each battery. After the battery impedance is tested, the meter will pause the test and prompt "Switch test clip". After the connection bar test is completed, the meter will prompt "Test completed".


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