Amprobe AF-600 A-Frame Ground Fault Locator User Manual

Introduction

The Amprobe AF-600 A-Frame Ground Fault Locator is an optional accessory designed for use with the Amprobe UAT-600 Series. This accessory, when used in conjunction with the UAT-600-T transmitter, enables precise location of cable and wire ground faults, sheath faults, or pipeline coating defects. Its advanced technology and digital signal processing facilitate a fast, accurate, and unambiguous pinpointing process.

What's in the Box

The Amprobe AF-600 A-Frame Ground Fault Locator package includes the following components:

• A-Frame Receiver
• Batteries (6 AA batteries included)
• Carrying Case
• User Manual

Figure 1: Contents of the Amprobe AF-600 A-Frame Ground Fault Locator kit.

Product Overview

The Amprobe AF-600 A-Frame is designed for robust field use, providing clear indications for fault location.

Figure 2: Main view of the Amprobe AF-600 A-Frame.

Figure 3: Close-up of the AF-600 display and controls.

Setup

Before beginning fault location, ensure the UAT-600-T transmitter and AF-600 A-Frame are properly set up.

1. Connect the A-Frame: Connect the AF-600 A-Frame accessory to the UAT-600-T transmitter. This combination is essential for accurate ground fault detection.
2. Transmitter Mode: Set the UAT-600-T transmitter to the "direct test lead connection" mode. This ensures the correct signal is transmitted for the A-Frame to detect.
3. Signal Selection: On the transmitter, select either "A-Lo" (A-Frame low signal) for higher accuracy pinpointing, or "A-Hi" (A-Frame high signal) if the line to be surveyed is long or the fault resistance is high.
4. Signal Strength Output: Set the signal strength output on the transmitter to "1". Only increase this setting if the resulting signal strength is poor, to avoid signal overflow.

Operating Instructions

Follow these steps to effectively locate ground faults using the Amprobe AF-600 A-Frame.

1. Power On: Turn on the AF-600 A-Frame unit.
2. Initial Positioning: Use the left/right indicator arrows on the A-Frame's display to position the A-Frame directly over the cable. Begin this process near the transmitter.
3. Walking the Line: As you walk along the route of the line, allow a couple of seconds for the readings to stabilize. Place the spikes of the A-Frame into the ground approximately every two or three paces.
4. Approaching the Fault: In the proximity of the fault, maintain the A-Frame aligned with the cable using the left/right arrows. The A-Frame will detect the fault signal, and the fault direction compass arrow will point forward.
5. Crossing the Fault: When you cross the exact location of the fault, the compass arrow will change direction. Simultaneously, the two-digit fault signal level will begin to decrease as you move away from the fault.
6. Pinpointing the Fault: To pinpoint the fault accurately, carefully place the A-Frame both immediately before and immediately after the point where the compass direction changes and the signal level starts to decrease. The point of maximum reading just before the direction change, and the point of minimum reading just after, will help in precise fault identification.

Figure 4: Operating the AF-600 A-Frame in the field.

Figure 5: Proper technique for engaging the A-Frame spikes.

Video Demonstration: Ground Fault Location with Amprobe UAT-600 A-Frame

Maintenance

To ensure the longevity and optimal performance of your Amprobe AF-600 A-Frame Ground Fault Locator, regular maintenance is recommended.

• Cleaning: After each use, especially in dirty or wet conditions, wipe down the A-Frame and its components with a clean, damp cloth. Ensure all parts are dry before storing.
• Battery Replacement: The unit requires 6 AA batteries. If the display indicates low battery or the unit's performance degrades, replace all batteries with new ones. Always use the specified battery type.
• Storage: Store the A-Frame in its provided carrying case in a dry, cool environment, away from direct sunlight and extreme temperatures.
• Inspection: Periodically inspect the spikes, cables, and housing for any signs of wear, damage, or corrosion. If any damage is found, contact Amprobe customer support for repair or replacement.

Troubleshooting

If you encounter issues while using your Amprobe AF-600 A-Frame, consider the following common troubleshooting steps:

• No Signal/Weak Signal:
  • Ensure the UAT-600-T transmitter is powered on and correctly connected to the line being tested.
  • Verify that the transmitter is set to the appropriate A-Frame signal mode (A-Lo or A-Hi).
  • Check the signal strength output on the transmitter and increase it if necessary, but avoid excessive levels.
  • Ensure the A-Frame spikes are making good contact with the ground.
  • Replace batteries in both the A-Frame and the transmitter if they are low.
• Inconsistent Readings:
  • Ensure you are walking at a consistent pace and placing the A-Frame spikes evenly.
  • Check for external interference from other active lines or strong electromagnetic fields.
  • Verify that the A-Frame is aligned correctly with the cable path.
• Unit Not Powering On:
  • Check that the batteries are correctly inserted and fully charged.
  • Ensure the battery compartment is clean and free of corrosion.

If problems persist after attempting these steps, contact Amprobe customer support for further assistance.

Specifications

Warranty and Support

Amprobe products are designed for reliability and performance. For detailed warranty information, please refer to the warranty card included with your product or visit the official Amprobe website. For technical support, troubleshooting assistance, or service inquiries, please contact Amprobe customer service.

You can find more information and support resources on the Amprobe official website.