Walfront NF-308 Cable Detector User Manual

1. Introduction

The Walfront NF-308 Cable Detector is a versatile handheld instrument designed for efficient line detection and inspection. It is an indispensable tool for professionals working with network cables, telephone lines, BNC coaxial cables, USB lines, and other metal cables. This device is ideal for integrated wiring projects, maintenance, and troubleshooting in communication systems, computer networks, and information systems.

The NF-308 features an LCD display, allowing for clear readings and includes functions such as cable length measurement, continuity testing, and live line finding with strong anti-interference capabilities.

2. Safety Information

• Do not attempt to repair or modify the device. Refer all servicing to qualified personnel.
• Ensure the correct battery type (6F22 9V) is used and inserted with correct polarity.
• Do not expose the device to extreme temperatures, humidity, or direct sunlight.
• Avoid using the device in environments with strong electromagnetic interference.
• Always disconnect the device from any live circuits before performing tests, unless specifically instructed otherwise for live line finding functions.
• Keep the device clean and dry.

3. Package Contents

Please check the package contents upon receipt to ensure all items are present:

• 1 x Receiver (NF-308-S)
• 1 x Transmitter (NF-308)
• 1 x Remote Terminal (NF-308-R)
• 1 x Headphone
• 1 x Alligator Clip Cable
• 2 x Network Cables (RJ45)
• 1 x User Manual
• 1 x Carrying Bag

4. Product Overview

The NF-308 system consists of three main units: the Transmitter, the Receiver, and the Remote Terminal.

4.1. Transmitter (NF-308)

The main unit with an LCD display for showing test results and settings.

• LCD Display: Shows test results, cable length, voltage, and other information.
• PAIR&L Button: Used for pair testing and length measurement.
• SCAN Switch: Toggles between SCAN mode (for tracing) and OFF.
• Power Button: Turns the unit ON/OFF.
• Up/Down Arrows: Navigation buttons for menu and settings.

• MAIN (RJ45): Primary port for network cable testing.
• PORT FLASH (RJ45): Used for identifying switch port connections.
• BNC: Port for coaxial cable testing.

4.2. Receiver (NF-308-S)

Used for tracing cables and detecting signals from the transmitter.

• Probe: For sensing the signal emitted by the transmitter.
• Volume Control: Adjusts the sound level of the detected signal.
• RJ45 SCAN Port: For direct connection to network cables for scanning.
• Headphone Jack: For private listening of the signal.

4.3. Remote Terminal (NF-308-R)

A small, passive unit used in conjunction with the transmitter for continuity and length testing of cables.

• RJ45 Port: For connecting the remote end of a network cable.
• BNC Port: For connecting the remote end of a coaxial cable.

5. Setup

5.1. Battery Installation

The NF-308 Transmitter and Receiver each require one 6F22 9V battery (not included). To install:

1. Locate the battery compartment on the back of the Transmitter and Receiver units.
2. Open the battery cover.
3. Insert a 6F22 9V battery, ensuring correct polarity (+/-).
4. Close the battery cover securely.

5.2. Initial Power On

Press the power button on the Transmitter unit to turn it on. The LCD display should light up. The device has an automatic delay shutdown function to conserve battery life.

6. Operating Instructions

6.1. Cable Tracing / Line Finding

This function is used to locate a specific cable among a bundle or to trace its path.

1. Connect one end of the cable to be traced to the appropriate port (RJ45, RJ11, or BNC) on the Transmitter unit.
2. Turn on the Transmitter and set the SCAN switch to 'SCAN'.
3. Turn on the Receiver unit.
4. Use the Receiver's probe to scan along the cable path or through the bundle of cables.
5. When the Receiver detects the signal from the Transmitter, it will emit an audible tone. The tone will be strongest when the probe is directly over the target cable. Adjust the volume on the Receiver as needed.
6. For noisy environments, use the provided headphones with the Receiver.

6.2. Network Cable Length Measurement

The NF-308 can measure the length of network cables up to 1000 meters with an accuracy of ±3%.

1. Ensure the cable is not connected to any active network devices.
2. Connect one end of the network cable to the 'MAIN' RJ45 port on the Transmitter.
3. Connect the other end of the network cable to the RJ45 port on the Remote Terminal.
4. On the Transmitter, select the length measurement function (refer to the on-screen menu if applicable, or press 'PAIR&L' button).
5. The LCD will display the measured cable length.

6.2.1. Length Calibration

For accurate length measurements, especially for cables shorter than 10 meters, calibration is recommended. The calibration cable length should be greater than 10 meters.

1. Connect a known length of network cable (greater than 10 meters) to the Transmitter and Remote Terminal.
2. Access the calibration menu on the Transmitter (refer to the manual's specific menu navigation).
3. Follow the on-screen prompts to perform calibration.

6.3. Continuity Test (Wiremap)

This function checks for open circuits, short circuits, and cross-connections in network (RJ45) and BNC coaxial cables.

1. Connect one end of the cable to the appropriate port on the Transmitter.
2. Connect the other end of the cable to the corresponding port on the Remote Terminal.
3. On the Transmitter, select the continuity test or wiremap function (often labeled 'PAIR&L' or similar).
4. The LCD will display the wiremap, indicating the connection status of each wire pair.
5. Common indications:
• Open: A break in the wire.
• Short: Two or more wires are touching.
• Cross: Wires are connected to the wrong pins at the other end.
• Good: All wires are correctly connected.

6.4. Port Flash Function

This function helps identify the corresponding port on a network switch or router.

1. Connect one end of the network cable to the 'PORT FLASH' RJ45 port on the Transmitter.
2. Connect the other end of the network cable to an unknown port on a network switch or router.
3. Activate the Port Flash function on the Transmitter.
4. The corresponding port LED on the switch/router will flash, allowing you to identify it.

6.5. Voltage Measurement

The NF-308 can measure voltage from 0-60V.

1. Connect the alligator clip cable to the appropriate input on the Transmitter.
2. Connect the clips to the voltage source to be measured.
3. The voltage reading will be displayed on the LCD screen.

7. Maintenance

• Cleaning: Wipe regularly with a damp cloth and mild detergent. Do not use abrasives or solvents, as they may damage the casing or screen.
• Storage: When not in use for extended periods, remove the batteries to prevent leakage. Store the device in its carrying bag in a cool, dry place, away from direct sunlight and extreme temperatures.
• Battery Replacement: Replace batteries when the low battery indicator appears on the LCD or when the device's performance degrades.

8. Troubleshooting

9. Specifications

10. Support

For technical assistance, troubleshooting beyond this manual, or inquiries regarding your Walfront NF-308 Cable Detector, please contact Walfront customer support through the retailer's platform or the official Walfront website. Please have your product model number (NF-308) and purchase details ready when contacting support.