The UNI-T UT681C is a handheld cable tester for checking RJ45 Ethernet, RJ11 telephone and BNC cables for open circuits, short circuits and crossover faults. It provides fast and slow test modes, LED status indication and single-key operation for network, telephone and weak-current system maintenance.
Key Features
- Tests RJ45 Ethernet, RJ11 telephone and BNC cables
- Automatically checks for open circuits, short circuits and crossover faults
- Supports fast and slow test modes with LED status indication
- Tests shielded and unshielded Ethernet cables
- Single-key operation with manual and automatic power-off functions
Product Specifications
| Product Type |
Handheld Cable Tester |
| Model |
UT681C |
| Test Interfaces |
RJ45, RJ11 and BNC |
| BNC Testing |
Requires the supplied BNC-to-RJ45 adaptor |
| Test Functions |
Open circuit, short circuit and crossover detection |
| Test Modes |
Fast Test and Slow Test |
| Display |
LED status display |
| Power Supply |
9V battery |
| Auto Power-Off |
After 10 minutes of inactivity |
| Operating Temperature |
0–40°C |
| Storage Temperature |
-10–50°C |
| Operating Humidity |
20–80%RH |
| Altitude |
Up to 2000 m |
| Transmitter Dimensions |
102 × 62 × 28 mm |
| Receiver Dimensions |
102 × 37 × 28 mm |
| Compliance |
CE; EN61326-1:2013; EN61326-2-2:2013 |
Applications
- Ethernet network cable installation and maintenance
- Telephone line testing
- BNC cable continuity and wiring checks
- Weak-current system installation and inspection
- Communication and structured-cabling troubleshooting
Tool Compatibility
RJ45 and RJ11 cables connect directly to the tester. BNC cable testing requires the supplied BNC-to-RJ45 adaptor. Confirm the connector type and cable wiring before testing.
Included Components
- UT681C transmitter and receiver
- 9V battery
- BNC-to-RJ45 adaptor
- User manual