1. Introduction
This manual provides detailed instructions for the safe and effective operation of your HANMATEK WT1 Professional Network Cable Tester. While the product title includes 'Circuit Breaker Finder', this manual focuses on the primary functions of network cable testing (RJ45), telephone line testing (RJ11), wire tracing, and continuity detection, as detailed in the product's features. Please read this manual thoroughly before use and retain it for future reference.

Figure 1: HANMATEK WT1 Professional Network Cable Tester with accessories.
2. Product Components
The HANMATEK WT1 Network Cable Tester includes the following items:
- Transmitter Unit
- Receiver Unit
- RJ45 Cable
- RJ11 Cable
- Cable with crocodile clamp
- Earphone
- 2x 9V Battery (not always included, check packaging)
- User Manual
- Portable canvas bag

Figure 2: Contents of the HANMATEK WT1 package.
Component Identification

Figure 3: Labeled diagram of the Transmitter and Receiver units.
Refer to Figure 3 for a visual guide to the buttons, ports, and indicators on both the Transmitter and Receiver units.
3. Setup
3.1 Battery Installation
Both the Transmitter and Receiver units require 9V batteries for operation. To install or replace batteries:
- Locate the battery compartment on the back of each unit.
- Open the battery cover.
- Insert a 9V battery, ensuring correct polarity (+/-).
- Close the battery cover securely.
Note: Ensure batteries are installed correctly before use. Low battery may affect performance.
4. Operating Instructions
4.1 Wire Tracing (Cable Finding)
This function helps locate a specific cable among a bundle or identify the path of a cable without stripping its insulation.
- Connect the Transmitter to the cable you wish to trace using the appropriate connector (RJ45, RJ11, or crocodile clamp cable).
- On the Transmitter, select the "TONE" mode.
- Turn on the Receiver unit and adjust the volume knob to a suitable level. You may use the earphones for clearer audio in noisy environments.
- Move the Receiver's probe along the suspected path of the cable. The sound will be loudest and the indicator brightest when the Receiver is close to the target wire.
- Follow the sound to trace the cable's path or identify the specific cable.

Figure 4: Using the Receiver to trace a network cable.

Figure 5: The Receiver's lighting function for use in dark areas.
Demonstration Video: Wire Tracing
Video 1: Demonstration of network cable tracing. (Note: The device shown in this video may differ from the HANMATEK WT1.)
4.2 Network Cable Testing (RJ45)
This function tests the continuity and wire sequence of RJ45 network cables, identifying open circuits, short circuits, and cross-wiring.
- Connect one end of the RJ45 cable to the RJ45 port on the Transmitter.
- Connect the other end of the RJ45 cable to the RJ45 port on the Receiver.
- On the Transmitter, select the "NETWORK" or "SCAN" mode.
- Observe the indicator lights on both the Transmitter and Receiver. The lights will illuminate in sequence (1-8, G) to indicate proper wiring.
- Any deviation from the standard sequence or unlit indicators signify a wiring fault (e.g., open circuit, short circuit, cross-wiring).

Figure 6: Testing the wire sequence of an RJ45 network cable.
Demonstration Video: RJ45 Cable Test
Video 2: Demonstration of RJ45 network cable testing. (Note: The device shown in this video may differ from the HANMATEK WT1.)
4.3 Telephone Line Testing (RJ11)
This function identifies the status of working telephone lines (clear, ringing, busy) and detects TIP or RING wires.
- Connect the RJ11 cable to the RJ11 port on the Transmitter.
- Connect the other end of the RJ11 cable to the telephone line or device to be tested.
- On the Transmitter, select the "TONE" mode.
- Use the Receiver's probe to detect the signal on the telephone line. The indicator lights and sound will vary based on the line status (e.g., clear, ringing, busy).
- The device can also help identify the polarity of the telephone line.
Demonstration Video: RJ11 Telephone Line Test
Video 3: Demonstration of RJ11 telephone line testing. (Note: The device shown in this video may differ from the HANMATEK WT1.)
4.4 Continuity Detection
The WT1 can quickly and reliably measure continuity for various wires using the crocodile clamp cable.
- Connect the crocodile clamp cable to the Transmitter.
- Attach the clamps to the two ends of the wire you want to test for continuity.
- On the Transmitter, select the "CONT" mode.
- Observe the indicator on the Transmitter. A lit indicator signifies continuity.
5. Maintenance
- Keep the device clean and dry. Use a soft, damp cloth for cleaning. Do not use abrasive cleaners or solvents.
- Remove batteries if the device will not be used for an extended period to prevent leakage.
- Store the device in its portable canvas bag to protect it from dust and physical damage.
- Avoid exposing the device to extreme temperatures or direct sunlight.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Unit does not turn on | Dead or incorrectly installed batteries. | Check battery polarity; replace with fresh 9V batteries. |
| No signal/weak signal during wire tracing | Transmitter not in TONE mode; Receiver volume too low; Cable too deep/shielded; Battery low. | Ensure Transmitter is in TONE mode; Increase Receiver volume; Use earphones; Check/replace batteries. |
| Incorrect cable test results (RJ45/RJ11) | Poor connection; Damaged cable; Incorrect mode selected. | Ensure cables are fully inserted; Inspect cable for damage; Select correct test mode. |
7. Specifications
- Model: WT1
- Brand: HANMATEK
- Functions: Wire Tracking, Network Cable Testing (RJ45), Telephone Line Testing (RJ11), Continuity Testing
- Power Source: Battery Powered (2x 9V batteries required)
- Dimensions: 13.4 x 13 x 4.8 cm (Parcel Dimensions)
- Item Weight: 8 Grams
- Min. Operating Voltage: 9 Volts
- Compliance: CE, FCC, RoHS, REACH (Possible values)





