QLD-NZ Battery Internal Resistance Tester

Precautions for Use

1. The operating voltage range of this instrument is 1~16V. Do not exceed this voltage range!
2. This instrument uses the AC discharge method and features an internal high-voltage supply. Do not open the casing to prevent injury from high voltage!
3. If the instrument malfunctions, please refer to this operation manual first, and then consult after-sales technical personnel!
4. Do not use this instrument near explosive gases, vapors, or dust.
5. Do not use this instrument if the casing (part of the casing) or test clip (probe) is removed (damaged).
6. A lithium battery powers this instrument. The battery must be correctly installed in the instrument’s battery compartment. When the battery power is low (less than 1%), charge it promptly until fully charged (100%) or replace the battery. Insufficient battery power will cause the instrument to malfunction.
7. This instrument uses both resistive touch and button operation modes. Do not use sharp objects to operate on the LCD screen to avoid permanent scratches. When storing instruments, prevent contact between the LCD screen and sharp objects; store the instruments in a portable case.

Product Introduction

1. Overview

As a crucial component of backup power, batteries play a vital final role in ensuring the safe operation of a system. Therefore, batteries must be tested and maintained quarterly or even monthly, and the test results analyzed. Internationally, testing battery internal resistance or conductance is widely used in routine battery maintenance. Battery internal resistance or conductance is recognized as an essential parameter for accurately and quickly assessing battery health.

2. Product Introduction

The battery internal resistance or conductance tester uses a color resistive touchscreen. The instrument is operated flexibly and conveniently using a finger or stylus; it is a digital storage, multi-functional portable tester that quickly and accurately measures battery operating parameters. This instrument can detect the voltage and internal resistance or conductance of individual batteries online, store and process the detected data, alarm for battery faults, and accurately and effectively determine the condition of individual batteries. The instrument saves, queries, deletes, and exports test data. The host computer software analyzes and displays the test data through various charts and graphs, automatically generating battery test reports.

3. Product Features

• The instrument employs both color touchscreen LCD and button operation modes, allowing direct touch or button operation. It is simple to use, with a straightforward workflow that caters to users with different habits.
• Data storage methods: internal and external storage. Internal storage can store 999 test data sets, each containing data for 500 batteries; data can be queried and analyzed.
• It features automatic identification and measurement of positive and reverse connections.
• The instrument has functions for recording and querying voltage, internal resistance/conductance, and capacity, enabling easy estimation and analysis of remaining battery capacity.
• The instrument has oscilloscope functionality, displaying the battery’s highest and lowest voltages in real time.
• The host computer data management software is robust and user-friendly, providing data management, printing, analysis, report generation, and automatic test report generation.
• Weighing less than 0.5 kg, the handheld design allows for single-handed operation and fully automated measurement.
• Powered by a high-capacity lithium battery, it can withstand long-term testing.
• Compact size, extremely convenient; exquisite appearance, excellent workmanship; beautiful interface, smooth operation.

4. Technical Specifications

Specification	Details
Measurement Range	Conductance: 20–19,990 S
	Internal Resistance: 0.01 mΩ–120 mΩ
	Voltage: 1 V–25 V
Minimum Measurement Resolution	Conductance: 1 S
	Internal Resistance: 0.01 mΩ
	Voltage: 1 mV
Measurement Accuracy	Conductance: ±0.5% rdg ±6 dgt
	Internal Resistance: ±0.5% rdg ±6 dgt
	Voltage: ±0.2% rdg ±6 dgt
Power Supply	5 V, Rechargeable Lithium Battery
Power Consumption	Standby: 10 hours
Storage Capacity	8 GB TF Card
Display	800×480 True Color 5-inch Touchscreen
Dimensions	160 × 110 × 42 mm
Weight	0.5 kg

Interface and Power On/Off Instructions

1. Interface Instructions

2. Power On/Off

• Power On: With the power off, press and hold the red power button for approximately 3 seconds to automatically power on.
• Power Off: With the power on, press and hold the red power button for approximately 3 seconds to power off automatically.
• With the power on, the instrument will automatically power off after 20 minutes of inactivity.

3. Included Accessories

• Charger
• USB flash drive with MiniUSB interface
• Test clip

Wiring Instructions

During testing, do not clamp the test clip onto the screw cap, as this will affect testing accuracy. It can be clamped onto the terminal post or connecting strip.

The battery reference internal resistance or conductance should be based on the information provided by the battery manufacturer. This parameter has a certain impact on the assessment of remaining capacity.

Battery Connection Diagram

1. Terminal Test

This instrument accurately measures a battery’s internal resistance. The connection method is shown in the diagram above.

Note: The polarity of the test clip does not need to be distinguished! (This instrument has bidirectional measurement functionality.)

2. Connecting Strip Test

• Step 1: Test the battery first.
• Step 2: Test the battery and connecting strip.

This instrument has a function to measure the resistance of the connecting strip, but this function cannot be performed by directly connecting the test clip to both ends of the connecting strip. It needs to be connected to the battery and completed in two steps, as shown in the diagram above.

3. Group Testing Method for Connecting Strips

In group testing, when selecting the “Connecting Strip Test” mode, please test according to the test clip connection sequence shown in Figures 1, 2, 3, 4, 5, and 6 above. The instrument will automatically calculate the internal resistance value of each battery and the resistance value of the connecting strip. After testing the battery internal resistance, the instrument will pause the test and prompt “Switch Test Clip.” After the connecting strip test is completed, the instrument will prompt “Test Completed.”

Instrument Interface Introduction

1. Main Page

The interface consists of three parts: top, middle, and bottom. The top left displays the menu names, and the right shows the battery level. The bottom is the prompt bar, and the middle is the display and operation area.

When using the touchscreen, you can select a menu task and click it to execute it. If using the keyboard, use the “TAB” key to switch between menu choices and press confirm to execute.

2. Single Cell Parameter Settings

After entering single-cell testing, select the battery voltage type, battery model, test parameters, and station number to begin the measurement.

3. Single Cell Test in Progress

During single-cell testing, please wait for the test to complete. You can also manually press the [Stop] button to interrupt the measurement operation.

4. Single Cell Test Completed

After the single-cell measurement is complete, the internal resistance/conductivity value is automatically displayed, while the voltage value is shown in real time. If it is in connection bar test mode, the interface will also display the connection bar test values.

5. Group testing

 

The measurement interface for group batteries is as follows. Its measurement operation method is similar to that of single-cell battery measurement, except that the number of battery cells has been increased. After a group of batteries is tested, you can click the [Next Cell] button to increment the battery number and automatically proceed with the test. You can also click the “Retest” button to retest the battery of this cell number.

6. Data Management

The data management interface allows for opening, exporting to a USB flash drive, and deleting test record data. Before performing the above operations, select a specific row of data in the table; otherwise, an error will be displayed. To prevent accidental data deletion, each data point can be operated on only once at a time.

7. Data Viewing

This interface can view the test data saved inside the instrument and the set test parameter values.

8. Test Waveform

Display the measured voltage value in real time, as well as the maximum and minimum values of the measured voltage.

9. Enter the password

Before entering the data calibration page, a password entry page will open. You must enter the correct password before proceeding. The default password for the machine is: “13915”.

10. Calibration of internal resistance and voltage measurement values

When the voltage or internal resistance readings are inaccurate, you can enter the data calibration page to calibrate them.

Before entering calibration data, a reset is required. The reset operation is as follows: Enter 0 in all the corresponding input boxes, then click [OK]. A prompt will pop up indicating that the reset is complete. After entering the required values, click [OK] again to complete the calibration.

11. In-machine electronic version of the help documentation

This interface provides some standard testing technical requirements and methods. Such as measurement methods, wiring methods, data calibration steps, etc.

12. Parameter Settings

On the parameter setting page, you can make corresponding changes to the system language and date and time. After the changes are completed, pressing [OK] will take effect, while pressing [Back] will not.

13. Factory parameters of the product

This interface indicates the factory parameters of this instrument. The product model can be changed before leaving the factory according to the customer’s requirements.

Daily maintenance

1. Cleaning and Maintenance

Clean the central unit with a soft, damp cloth and a mild cleaning agent. Please do not use scratch-type, dissolving-type cleaning agents or alcohol, etc., to avoid scratching the main unit panel or damaging the text on the central unit.

Clean the voltage wire clamp with a soft, damp cloth and a mild cleaning agent. After cleaning, rinse once with clean water and dry. Please do not scratch the metal part of the probe to avoid poor contact and incorrect test results.

2. Storage

After use, the central unit should be promptly placed in the computer case. All clips and wires should be organized and put in the corresponding positions inside the computer case. To maintain the battery in the best condition, it is recommended to charge it regularly (once a month).

3. Battery Maintenance

At the time of delivery, the battery may not be charged. It should be charged before use. Turn on the device and check the charging status. If the battery voltage is too low to start, charge it for a few minutes and then check again. After being fully charged, the battery can generally be used for 9 to 10 hours.

• When charging, connect the charger to the central unit. It can be charged without turning the device on. (It is recommended to charge it when it is turned on.)
• Even if it is charged for a long time, such as throughout the entire weekend, it will not cause damage to the instrument.

Note: If it is necessary to charge for a long time, someone must be present to supervise

4. Extend the battery operation time

Fully charge before use. Please turn off the device’s power if it is not used for a long time.