Introduction
The MASTECH MS6810 is a versatile multi-network cable tester designed for efficiently testing coaxial, Unshielded Twisted Pair (UTP), and Shielded Twisted Pair (STP) cables. This handheld device automatically identifies common wiring issues such as open circuits, short circuits, miswires, and reversals, and can also detect the integrity of cable shields. With its clear LED display and portable design, the MS6810 is an essential tool for communication engineering, wiring installations, and network maintenance professionals.
Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, or personal injury.
- Do NOT connect the cable tester to live circuits. Testing live circuits may damage the device and pose a risk of electric shock.
- Ensure the battery compartment is securely closed before use.
- Do not expose the device to moisture or extreme temperatures.
- Use only the specified battery type (1 x 9V 6F22 battery).
- Keep the device away from children.
Package Contents
Verify that all items are present and in good condition upon unpacking:
- 1 x MASTECH MS6810 Transmitter Unit
- 1 x MASTECH MS6810 Receiver Unit
- 1 x Carry Bag
- 1 x User's Manual (this document)

Product Overview
The MASTECH MS6810 consists of a main transmitter unit and a detachable remote receiver unit. Both units feature ports for RJ45 (for UTP/STP cables) and BNC (for coaxial cables), along with LED indicators to display test results.

Main Unit Features:
- POWER LED: Indicates power status.
- BNC Indicator: LEDs for 'Green Good' and 'Red Bad' to show BNC cable status. A button is present to initiate BNC testing.
- ON/OFF Switch: To power the device on or off.
- GND LED: Indicates ground connection status.
- 10 BASE-T/TOKEN RING AT&T258A/EIA/TIA568 LEDs: A series of LEDs (1&2, 3&6, 4&5, 7&8) to indicate wire pair status for network cables.
- RJ45 Port: For connecting UTP/STP network cables.
- BNC Port: For connecting coaxial cables.

Remote Unit Features:
- GND LED: Indicates ground connection status.
- Light-Faulty Pr LEDs: A series of LEDs (1&2, 3&6, 4&5, 7&8) to indicate wire pair status, including 'Good Pr' (Good Pair) and 'Mix Or No' (Mixed or No connection).
- RJ45 Port: For connecting UTP/STP network cables.
- BNC Port: For connecting coaxial cables.

Specifications
| Feature | Specification |
|---|---|
| Brand | MASTECH |
| Model | MS6810 |
| Working Temperature | 0~40°C (32~104°F) |
| Relative Humidity | < 80% RH |
| Power Supply | 1 x 9V (6F22) Battery |
| Weight | 157g (5.54oz) |
| Overall Dimensions (L x W x H) | Approx. 15 x 7 x 2.5 cm |
| Material | ABS |
| Display | LED |
| Wireless Function | No |
| High-concerned Chemical | None |
| Certification | None |
| Origin | Mainland China |
Setup
1. Battery Installation
- Locate the battery compartment on the back of the main transmitter unit.
- Slide open the battery cover.
- Insert one 9V (6F22) battery, observing the correct polarity (+/-).
- Close the battery cover securely.

2. Connecting the Remote Unit
The remote unit can be detached from the main unit for testing cables installed in different locations. To detach, simply slide the remote unit away from the main unit. To reattach, align the connectors and slide it back until it clicks into place.
Operating Instructions
1. Powering On/Off
Slide the ON/OFF switch on the main unit to the 'ON' position to power on the tester. The POWER LED will illuminate. Slide to 'OFF' to power off.
2. Testing UTP/STP Network Cables (RJ45)
- Connect one end of the UTP/STP cable to the RJ45 port on the main transmitter unit.
- Connect the other end of the cable to the RJ45 port on the remote receiver unit.
- Observe the LED indicators on both the main and remote units. The LEDs will sequentially light up, indicating the status of each wire pair (1&2, 3&6, 4&5, 7&8) and the ground (GND).
- Interpreting Results:
- Sequential Green Lights (Main & Remote): Indicates a correctly wired cable (Good Pr).
- No Light for a Pair: Indicates an open circuit or broken wire.
- Multiple Lights Simultaneously or Incorrect Sequence: Indicates a short circuit, miswire, or reversal (Mix Or No).
- GND LED: If illuminated, indicates the shield is properly connected (for STP cables).
3. Testing Coaxial Cables (BNC)
- Connect one end of the coaxial cable to the BNC port on the main transmitter unit.
- Connect the other end of the cable to the BNC port on the remote receiver unit.
- Press the 'Press to Test BNC' button on the main unit.
- Interpreting Results:
- Green Good LED: Indicates a properly connected coaxial cable.
- Red Bad LED: Indicates a fault in the coaxial cable (e.g., open circuit, short circuit).
- Unit Open LED: Indicates the remote unit is not connected or the cable is completely open.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use abrasive cleaners or solvents.
- Storage: When not in use, store the tester in its carry bag in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Replacement: If the POWER LED does not light up or the test results become inconsistent, replace the 9V battery as described in the 'Battery Installation' section. Remove the battery if the device will not be used for an extended period to prevent leakage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tester does not power on. | Dead or incorrectly installed battery. | Check battery polarity or replace with a new 9V battery. |
| Inconsistent or incorrect test results. | Loose cable connections, faulty cable, or low battery. | Ensure cables are securely connected. Test with a known good cable. Replace battery if low. |
| Remote unit LEDs do not light up for network cable test. | Cable is completely open or remote unit not connected. | Verify remote unit is connected. Check cable for severe damage. |
| BNC test always shows 'Red Bad' or 'Unit Open'. | Faulty BNC cable or remote unit not connected. | Ensure BNC cable is properly connected to both units. Test with a known good BNC cable. |
User Tips
- Always ensure a firm connection between the cable and the tester ports for accurate readings.
- When testing long cables, ensure the remote unit is securely attached to the far end.
- For intermittent issues, try wiggling the cable while testing to identify loose connections or internal breaks.
Warranty and Support
For warranty information or technical support, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.





