1. Introduction
The Pro'sKit MT-7028 Network Toner & Probe Kit is a versatile tool designed for network and telecommunication professionals. It provides essential functions for wire tracing, cable mapping, non-contact voltage detection, and polarity indication. This manual will guide you through the setup, operation, and maintenance of your MT-7028 kit to ensure optimal performance and longevity.
2. Package Contents
Please check the contents of your Pro'sKit MT-7028 Network Toner & Probe Kit. If any items are missing or damaged, please contact your vendor.
- MT-7028 Transmitter Unit
- MT-7028 Receiver Unit (Probe)
- RJ45 Cable Patch Cord
- RJ11 Cable Patch Cord
- Alligator Clips Patch Cord
- Earphone
- Pouch Bag
- 9V Batteries (x2)
- Instruction Manual

3. Key Features
- Wire Tracing: Capable of tracing wires up to 3 kilometers, even when connected to live telecommunication equipment and routers.
- Cable Mapping & Status Indication: Supports cable mapping and status indication for distances up to 300 meters. Features include Fast/Slow scan modes, pin-to-pin mapping display, and troubleshooting for continuity, shorts, opens, and crossovers.
- Non-Contact Voltage (NCV) Detection: Detects AC voltage ranging from 90V to 1000V, ensuring safety by allowing verification that power is off before testing.
- Polarity Indication: Easily identifies the polarity of telephone lines.
- Energy Saving: Automatic power-off function activates after 1 hour of inactivity to conserve battery life.
- LED Illumination: Built-in LED light on the receiver for working in dimly lit environments.
4. Setup
4.1 Battery Installation
Both the Transmitter and Receiver units require one 9V battery (NEDA 1604 / 6F22 DC9V). To install the batteries:
- Locate the battery compartment cover on the back of each unit.
- Use a screwdriver (if necessary) to open the cover.
- Insert a 9V battery, ensuring correct polarity (+/-).
- Replace the battery compartment cover and secure it.
4.2 Connecting Cables
The kit includes RJ45, RJ11, and alligator clips patch cords for various connection types. Select the appropriate cable for your testing needs and connect it to the corresponding port on the Transmitter unit.
5. Operating Instructions
5.1 Wire Tracing
To trace a specific wire or cable:
- Connect the cable to be traced to the Transmitter unit using the appropriate RJ45, RJ11, or alligator clips.
- Turn on the Transmitter unit and select the "SCAN" mode. The Transmitter will emit a tone.
- Turn on the Receiver unit (probe). Adjust the sensitivity dial on the Receiver to an appropriate level.
- Move the tip of the Receiver along the suspected path of the cable. The tone will be loudest when the Receiver is directly over the target cable.
- For noisy environments, use the included earphone with the Receiver for clearer audio detection.


5.2 Cable Mapping & Status Indication
To test the integrity and mapping of network or telephone cables:
- Connect one end of the cable to the appropriate RJ45 or RJ11 port on the Transmitter unit.
- Connect the other end of the cable to the corresponding port on the Receiver unit.
- Turn on the Transmitter unit and select the "TEST" mode.
- Observe the LED indicators on both the Transmitter and Receiver.
- The LEDs will light up sequentially, indicating the pin-to-pin mapping.
- Interpret the LED patterns:
- All LEDs light up sequentially: Indicates correct wiring.
- Missing LED: Indicates an open circuit (broken wire).
- Multiple LEDs light up simultaneously or out of sequence: Indicates a short circuit or crossover.
- "SHORT" LED: Illuminates if a short circuit is detected.
- Use the "SCAN" button on the Transmitter to switch between Fast/Slow scan speeds for detailed observation.


5.3 Non-Contact Voltage (NCV) Detection
To detect AC voltage without direct contact:
- Ensure the Receiver unit is powered on.
- Position the tip of the Receiver near the wire or outlet you wish to test for voltage.
- If AC voltage (90V-1000V) is present, the NCV LED on the Receiver will illuminate, and an audible alert may sound.
- Always verify that power is off before performing any work on electrical circuits.

5.4 Polarity Indication
To identify the polarity of a telephone line:
- Connect the telephone line to the RJ11 port on the Transmitter unit, or use the alligator clips to connect to the individual wires.
- Turn on the Transmitter unit and select the "POL" mode.
- Observe the "POL +/-" LED on the Transmitter. It will indicate the polarity of the connected line.

5.5 Video Demonstration
6. Specifications
6.1 MT-7028 Transmitter Specifications
| Feature | Specification |
|---|---|
| Tone frequency | 1kHz |
| Max. distance of transmission & Cable map | ≧3km & 300m |
| Tone mode | Hi/Low two-note tone |
| Compatible connectors | RJ45(8 pin)/RJ11(6 pin) compatible connectors for RJ45(8 pin), RJ11/12(6P/2C/4C/6C) cable map and RJ45 tone, RJ-11(6 pin) connectors for RJ11/12(6P/2C/4C/6C) tone |
| Cable types tested | RJ45 Lan cable Cat 5, 5e, 6, 7 (UTP/STP), RJ11/12 Telephone cable (6P/2C/4C/6C) |
| Continuity test | 1 LED (≦300Ω), Coaxial cable & normal solid/Stranded wire by alligator clips patch cord. |
| Cable map & Shielded indication | 8 LEDs & 1LED, Fast/Slow dual speed |
| Phone line polarity indication | 1 Dual color LED |
| Other functions | Live telecommunication equipment test and router test, Voltage protection AC 60V or DC 48V, Auto power off, Low battery display |
6.2 MT-7028 Receiver Specifications
| Feature | Specification |
|---|---|
| Frequency | 1kHz |
| Compatible connectors | RJ45(8 pin)/RJ11(6 pin) |
| Signal status indication | 1 LED & Buzzer, building ear jack |
| Cable map & Shielded indication | 8 LEDs & 1LED |
| NCV indication | 1 LED (AC90~1000V) |
| LED illumination | 1 LED |
| Battery type | DC 9.0V (NEDA 1604/ 6F22 DC9V ×1pcs) |
| Dimension (L×W×D) | 198×45×33 mm |

7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the units. Do not use abrasive cleaners or solvents.
- Storage: Store the kit in its pouch bag in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace batteries when the "BAT LOW" indicator on the Transmitter illuminates or when the units fail to power on or perform optimally. Always use fresh 9V batteries. Remove batteries if the device will not be used for an extended period to prevent leakage.
- Avoid Moisture: Do not expose the units to water or high humidity.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Dead or improperly installed batteries. | Replace batteries with new 9V batteries, ensuring correct polarity. |
| No tone detected during wire tracing. | Transmitter not in SCAN mode, Receiver sensitivity too low, or cable not properly connected. | Ensure Transmitter is in SCAN mode. Adjust Receiver sensitivity. Verify cable connections. |
| Incorrect cable mapping results (e.g., shorts, opens, crossovers). | Damaged cable, faulty connector, or incorrect cable type for test. | Inspect the cable and connectors for damage. Ensure you are using the correct cable type (e.g., Cat 5/6 for RJ45). Replace faulty cables if necessary. |
| NCV detection not working. | No AC voltage present, or Receiver not positioned correctly. | Ensure there is live AC voltage. Reposition the Receiver tip closer to the source. |
9. User Tips
Based on general usage and product feedback, here are some tips for getting the most out of your MT-7028 kit:
- When tracing wires in a bundle, start with the Receiver's sensitivity low and gradually increase it to pinpoint the exact cable.
- For cable mapping, always ensure both ends of the cable are securely connected to the Transmitter and Receiver for accurate results.
- The NCV function is a quick check for live voltage; always use a dedicated voltage meter for precise measurements and before working on electrical systems.
- Keep the included pouch bag handy to protect your kit from dust and physical damage during transport and storage.
10. Warranty and Support
Pro'sKit products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official Pro'sKit website. Please retain your proof of purchase for any warranty claims.





