1. Introduction
The MASTECH MS6818 is a professional, portable wire and cable tester designed for a wide range of electrical and plumbing detection tasks. This device consists of a transmitter and a receiver, working in tandem to accurately locate wires, track cables, and detect faults such as breaks and short circuits in various environments. It is ideal for inspecting interior wiring, underground cables, metal pipes, and identifying fuses and sockets.
Key features include:
- Detection of breaks and shorts in cables within walls or underground.
- Tracking of cables in walls or underground.
- Identification of fuses and safeguards.
- Detection of breaks or shorts in conduits under floors.
- Adjustable receiver sensitivity.
- Automatic ranging and auto power-off for energy efficiency.
- Backlight and worklight for improved visibility.
- NCV (Non-Contact Voltage) sensing for safer high-voltage electrical testing.
- AC/DC voltage testing from 12V to 400V.
- Dual-mode detection (Manual + Automatic).
- Silent mode for use in noise-sensitive environments.
2. Safety Information
Please read all safety warnings and instructions carefully before use to prevent electric shock, fire, or serious injury.
- Always check the instrument's appearance for any damage before use. Ensure it powers on correctly and displays information accurately.
- Regularly inspect the instrument for any wear or damage.
- After use, store the device in a dry, cool environment, free from corrosive gases, to ensure its longevity and proper functioning.
- The device is rated for Overvoltage Category CAT III 300V. Adhere to this rating to avoid hazards.
- Operating altitude should not exceed 2000 meters.
- Do not attempt to open or repair the device yourself. Refer to qualified service personnel.
- Ensure batteries are correctly installed and replaced when the low battery indicator appears.
3. Product Overview
3.1. Components
The MASTECH MS6818 package includes the following items:
- Transmitter (x1)
- Receiver (x1)
- Storage bag (x1)
- Grounding stake (x1)
- Test line (x1)
- Test clip (x1)
- Testing pen (x1)
- Instruction manual (x1)
- Color box (x1)
3.2. Device Layout and Controls
Familiarize yourself with the buttons, display, and ports on both the Transmitter and Receiver units.
Transmitter Controls & Display:
- Power On/Off Button: To turn the unit on or off.
- Start/Stop Button: Initiates or stops signal transmission.
- Level/Sel Buttons: Adjusts signal level or selects options.
- Code Sel Button: Selects emission rate encoding.
- LCD Display Screen: Shows various information including:
- Low voltage symbol
- Send power level information
- Send encoded information (default: F)
- External AC voltage symbol
- External DC voltage symbol
- Voltage display
- Launch status
- Signal transmission strength
- External voltage indication
- Silence alert
- Grounding Socket: For connecting the grounding stake.
- '+' Socket: For connecting test leads.
Receiver Controls & Display:
- Power On/Off Button: To turn the unit on or off.
- Backlight Mute Composite Key: Activates backlight and mute function.
- Flashlight Button: Turns on/off the built-in flashlight.
- UAC (NCV) Button: Activates Non-Contact Voltage detection mode.
- Level Buttons: Adjusts sensitivity (up/down).
- Manual Button: Toggles between manual and automatic detection modes.
- LCD Display Screen: Shows various information including:
- Receiver low voltage warning
- Battery voltage condition of the transmitter
- Emission rate transmission power level
- Manual mode / Automatic mode indicator
- Signal strength indicator (number, 'SEL' for no signal in manual mode, 'UAC' for UAC mode)
- Circular rings: Graphical display of set sensitivity (more rings = higher sensitivity).
- Received transmission encoding from the transmitter
- Bar-shaped signal strength display
- Low voltage of the power grid
- Silence alert
- Probe Head: For sensing signals.
- Speaker: Emits audible signals.
4. Specifications
4.1. Transmitter Technical Parameters
| Parameter | Value |
|---|---|
| Output Signal | 125kHz |
| Voltage Test | DC 12-400V ± 2.5%; AC 12-400V (50-60Hz) ± 2.5% |
| Display Screen | LCD, with function display and bar graph |
| Maximum Voltage Test | Maximum 400V AC/DC |
| Overvoltage Category | CAT III 300V |
| Pollution Level | 2 |
| Power Supply | 1x9V, IEC 6LR61 (Battery not included) |
| Minimum Current | Approximately 31mA |
| Maximum Current | Approximately 115mA |
| Fuse | F 0.5A 500V, 6.3x32 mm |
| Working Temperature Range | 0°C to 40°C, maximum 80% relative humidity (non-condensing) |
| Storage Temperature Range | -20°C to 60°C, maximum 80% relative humidity (non-condensing) |
| Altitude | Maximum 2000m |
| Size | 190mm x 89mm x 42.5mm |
| Weight (Without battery) | Approximately 360g |
| Weight (With batteries) | Approximately 420g |
4.2. Receiver Technical Parameters
| Parameter | Value |
|---|---|
| Tracking Depth (Monopolar application) | Approximately 0 to 2m |
| Tracking Depth (Bipolar application) | Approximately 0 to 0.5m |
| Tracking Depth (Single return line) | Up to 2.5m |
| Power Grid Voltage Identification | Approximately 0 to 0.4m |
| Display Screen | LCD, with function display and bar graph |
| Power Supply | 6x1.5V AAA, IEC LR03 (Batteries not included) |
| Minimum Current | Approximately 32mA |
| Maximum Current | Approximately 89mA |
| Working Temperature Range | 0°C to 40°C, maximum 80% relative humidity (non-condensing) |
| Storage Temperature Range | -20°C to 60°C, maximum 80% relative humidity (non-condensing) |
| Altitude | Maximum 2000m |
| Size | 241.5mm x 78mm x 38.5mm |
| Weight (Without battery) | Approximately 280g |
| Weight (With batteries) | Approximately 350g |
5. Setup
5.1. Battery Installation
The MASTECH MS6818 units do not come with batteries installed. Please purchase the correct battery types before use.
- Transmitter: Requires 1x 9V (6F22) battery.
- Receiver: Requires 6x 1.5V AAA (LR03) batteries.
To install batteries:
- Locate the battery compartment on the back of each unit.
- Open the battery cover.
- Insert the batteries, ensuring correct polarity (+ and -).
- Close the battery cover securely.
5.2. Initial Check
Before starting any detection work, perform a quick check:
- Turn on both the Transmitter and Receiver using their respective power buttons.
- Verify that the LCD screens illuminate and display information correctly.
- Check for any error messages or unusual behavior. If any issues are observed, refer to the Troubleshooting section.
6. Operating Instructions
The MS6818 operates by having the Transmitter inject a signal into the target line, which is then detected by the Receiver. The Receiver's display and audible alerts guide you to the signal source.
6.1. General Operation Steps
- Connect the Transmitter: Connect the Transmitter to the circuit or cable you wish to trace using the provided test leads, test clips, or testing pen. Ensure a secure connection. For non-energized lines, a grounding stake may be used.
- Power On: Turn on both the Transmitter and Receiver.
- Select Mode (Receiver): Use the 'MANUAL' button on the Receiver to switch between Manual and Automatic detection modes. In Automatic mode, the device adjusts sensitivity automatically. In Manual mode, you can fine-tune sensitivity using the 'LEVEL' buttons.
- Start Transmission (Transmitter): Press the 'START/STOP' button on the Transmitter to begin sending the signal.
- Trace with Receiver: Move the Receiver's probe head along the suspected path of the cable or pipe. The signal strength indicator (bars and rings) on the LCD, along with audible 'di di' sounds, will increase as you get closer to the signal source.
- Adjust Sensitivity: If the signal is too strong or too weak, adjust the Receiver's sensitivity using the 'LEVEL' buttons. More rings on the display indicate higher sensitivity.
- Interpret Display: The Receiver's display will show signal strength, received encoding, and other relevant information to help pinpoint the location or fault.
- Power Off: After use, turn off both units to conserve battery life. The device also features automatic shutdown.
6.2. Specific Detection Functions
6.2.1. Hidden Wire Fault Detection (Walls, Floors, Underground)
This function allows you to detect the route, breaks, and short circuits of lines buried in walls, under floors, or underground.
6.2.2. Search for Fuses / Sockets
The Receiver can be used to locate fuses, insurance circuits, concealed sockets, and distribution boxes by tracing the signal emitted by the Transmitter.
6.2.3. AC/DC Voltage Test (12V~400V)
The Transmitter can perform AC/DC voltage tests within the range of 12V to 400V. Connect the test leads to the appropriate points to measure voltage.
6.2.4. NCV Non-Contact Sensing Function
For safer high-voltage electrical testing, the Receiver features an NCV function. Press the 'UAC' button to activate this mode, allowing detection of live wires without direct contact.
6.2.5. Dual-Mode Detection (Manual + Automatic)
The Receiver offers both manual and automatic detection modes. In automatic mode, the device intelligently adjusts sensitivity. In manual mode, you have precise control over sensitivity, which can be useful in complex environments to filter out interference.
6.2.6. Silent Mode
In situations where noise might be disruptive, such as in hospitals or quiet offices, activate the silent mode. The detection operation can still be monitored visually through the simulation bars on the display.
6.2.7. Other Functions
The MS6818 also includes:
- Flashlight: For illuminating dark work areas.
- Automatic Frequency Scanning: Helps in identifying the optimal frequency for tracing.
- 8 Types of Emission Rate Encoding: Allows for classification or determination of laid lines, with the receiver displaying the transmitter's status.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the casing or internal components.
- Storage: When not in use, store the MS6818 in its provided carry bag in a dry, cool, and dust-free environment, away from direct sunlight and corrosive gases.
- Battery Replacement: Replace batteries promptly when the low battery indicator appears on the display to ensure accurate readings and prevent device malfunction. Remove batteries if the device will not be used for an extended period to prevent leakage.
- Regular Inspection: Periodically inspect the test leads, clips, and probes for any signs of wear, cuts, or damage. Replace damaged accessories immediately.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to unit(s) | Dead or incorrectly installed batteries. | Check battery polarity and replace with fresh batteries. |
| No signal detected by Receiver | Transmitter not powered on, not transmitting, or improperly connected. Receiver sensitivity too low. | Ensure Transmitter is on and transmitting. Check all connections. Increase Receiver sensitivity. |
| Inaccurate or erratic readings | Interference from other electrical sources. Receiver sensitivity too high. Poor connection. | Reduce Receiver sensitivity. Ensure good contact for connections. Try to minimize other electrical activity nearby. |
| Low battery indicator on display | Batteries are running low. | Replace batteries in the respective unit (Transmitter or Receiver). |
9. User Tips
- Start Low, Go High: When tracing, begin with the Receiver's sensitivity set to a lower level and gradually increase it until a clear signal is detected. This helps to avoid picking up extraneous signals.
- Direct Connection for Best Results: For the most accurate fault detection, always try to establish a direct connection between the Transmitter and the cable/circuit you are testing.
- Mind the Environment: Be aware of other electrical devices or metal structures in the vicinity that might cause interference. Adjust sensitivity or try different angles if readings are inconsistent.
- Use Silent Mode Wisely: The silent mode is excellent for professional environments where audible signals might be distracting. Rely on the visual signal strength indicators on the LCD.
- Practice Makes Perfect: Like any precision tool, familiarity with the MS6818's behavior in different scenarios will improve your accuracy and efficiency.
10. Warranty and Support
For detailed warranty information, service, and technical support, please refer to the official user manual provided with your product. A digital version of the user manual (PDF) can be accessed via the following link: MASTECH MS6818 User Manual (PDF).
Please retain your proof of purchase for any warranty claims.
