1. Introduction
The SUNKKO T688 is a versatile lithium battery multi-function tester designed for comprehensive analysis of 18650 lithium battery packs and individual cells. It provides accurate measurements for internal resistance, capacity, aging, and discharge characteristics. This manual will guide you through the setup, operation, and maintenance of your T688 tester to ensure safe and effective use.
2. Package Contents
Please check the package carefully to ensure all items are present and in good condition:
- SUNKKO T688 Lithium Battery Multi-Function Tester Unit
- User Manual (this document)
- Four-wire test fixture
- USB data cable
- Detection clip
- Power cable
- Kelvin Four-terminal sensing clamp (may be included depending on variant)
- Test clamps (may be included depending on variant)
3. Product Overview
Familiarize yourself with the various components and controls of the T688 tester.
Front Panel Controls and Indicators:
- Multifunction parameter screen: Displays voltage, current, resistance, capacity, and other test parameters.
- Power Button: Turns the device on/off.
- SET C-C Button: For setting constant current parameters.
- AH Button: For capacity (Ampere-hour) related functions.
- AH AUTO TEST Button: Initiates automatic capacity testing.
- CHG Button: For charging functions.
- LIO NH Button: Likely for selecting Lithium-ion or NiMH battery types.
- MΩ Button: For internal resistance measurement.
- SCAN C-C Button: For scanning constant current settings.
- 5V2A OUT Port: USB output for charging external devices.
- Vin+, Ain+, Vin-, Ain- Ports: Input terminals for connecting batteries and test leads.
Back Panel Components:
- Power Switch: Main power control.
- Fuse Tube: Overcurrent protection.
- Cooling System: Fan for heat dissipation during operation.
- Power Cord Inlet: For connecting the AC power cable.
4. Setup
- Unpacking: Carefully remove the T688 tester and all accessories from the packaging.
- Power Connection: Connect the provided power cable to the power cord inlet on the back of the tester and plug it into a suitable AC power outlet (AC 110V or 220V available).
- Power On: Flip the main power switch on the back panel, then press the Power button on the front panel to turn on the device. The LCD display should illuminate.
- Connecting Batteries:
- For single battery cells (e.g., 18650), use the four-wire test fixture. Connect the fixture to the Vin+ and Vin- terminals, and the Ain+ and Ain- terminals for sensing.
- For battery packs, use the detection clips. Ensure correct polarity when connecting to the Vin+ and Vin- terminals.
- For testing power banks or devices via USB, use the USB data cable connected to the 5V2A OUT port or appropriate input.
5. Operation
5.1 General Testing Functions
The T688 tester supports a wide range of tests for various battery types and configurations:
The T688 can test:
- Voltage: For battery cells, battery packs, power banks, and adapters.
- Current: For battery cells, battery packs, power banks, and adapters.
- Capacity: For battery cells, battery packs, and power banks.
- Resistance: For battery cells, battery packs, and USB data wires.
- Discharging: For battery cells and battery packs.
- Charging: For battery cells, battery packs, and power banks.
5.2 Supported Battery Types
The T688 is compatible with a wide range of measurable battery packs and rechargeable lithium batteries:
- Measurable Battery Packs: Power banks, battery packs for electric bikes, 18650 battery packs, battery packs for electric tools.
- Rechargeable Lithium Batteries: 18650 Battery, 21700 Battery, 26650 Battery, 32650 Battery, Li-polymer battery, Lithium iron phosphate Battery.
5.3 Discharging Current Selection
The T688 offers three levels of discharging current selection to match various battery capacities:
- 0.5A
- 1A
- 2A
The discharging current can be selected via the appropriate buttons on the front panel. The decimal point on the display indicates the voltage range: on the percentile when voltage is under 8V, and on the decile when voltage is higher than 8V. The discharging current is transformed to 5A if the voltage is higher than 8V. The discharging current cannot exceed 5A; otherwise, the tester will automatically shut off for protection and may be damaged.
5.4 Important Note for Battery Pack Testing
When testing the capacity and discharging of a battery pack, it is crucial to connect the battery pack to a protective board. Failure to do so may result in inaccurate readings or damage to the battery pack or tester.
6. Specifications
The following table outlines the key technical parameters of the SUNKKO T688 Battery Tester:
| Parameter | Value |
|---|---|
| Product Model | T-688 |
| Testing Voltage | 0-36V / 55V / 67V / 84V available |
| Internal Resistance Test Range | 0-2000mΩ |
| Resistance Accuracy | ±5% |
| Single Section Capacity Detection | Voltage resistance ±5% |
| Battery Pack Capacity Detection | 0-99.99Ah |
| Charging Voltage | 4.2V |
| Discharge Current Test | 0.5A / 1A / 2A / 5A |
| External USB Output | 5V-2V |
| Supply Voltage | AC 110V or 220V available |
| Set Charging Current | 0.5A / 1A / 2A |
| Package Size | 295*240*220mm |
| Display Discharge Current | 0-5A |
| Input Resistance | 1 KOhm, 10kΩ |
| Weight | 4.2kg |
7. Troubleshooting
7.1 Audible Alarm
The T688 tester is equipped with an audible and visual alarm system to indicate incorrect connections or operational issues. If the connection is wrong, the tester will produce an alarm sound and will not proceed with the test. Always ensure correct polarity and secure connections before initiating any test.
7.2 Automatic Shutdown
The tester will automatically turn off for protection if the discharging current exceeds 5A. This is a safety feature to prevent damage to the device. Ensure your selected discharging current is appropriate for the battery being tested and does not exceed the 5A limit.
8. Maintenance
- Cleaning: Keep the tester clean and free from dust. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the tester with care to avoid physical damage.
- Fuse Replacement: If the tester does not power on, check the fuse on the back panel. Replace it with a fuse of the same type and rating if necessary.
9. User Tips
- Always double-check battery polarity before connecting to the tester to prevent damage and ensure accurate readings.
- For battery pack capacity and discharge testing, ensure the battery pack has a protective board connected.
- Select the appropriate discharge current (0.5A, 1A, 2A) based on the battery's capacity to avoid overloading the tester.
10. Warranty and Support
The SUNKKO T688 Battery Tester comes with a one-year warranty. During this period, spare parts will be provided free of charge. Technical consultants are available at any time to assist with product-related inquiries.
For support or warranty claims, please contact your vendor or the manufacturer directly. Refer to the contact information provided at the time of purchase.
