Brunton ComPro Pocket Transit International Compass

Introduction

The Brunton ComPro Pocket Transit is a precision instrument designed for accurate measurements in various field applications, including geology, surveying, and outdoor navigation. Its robust construction and advanced features ensure reliable performance in demanding environments. This manual provides comprehensive instructions for the proper setup, operation, and maintenance of your Brunton ComPro Pocket Transit.

Setup

1. Initial Inspection

Upon unboxing, carefully inspect the compass for any signs of damage. Ensure all components are present and functioning correctly. The compass should open smoothly, and the needle should move freely when unlocked.

Figure 1: Brunton ComPro Pocket Transit in its open position, ready for use.

2. Magnetic Declination Adjustment

The ComPro Pocket Transit features a magnetic declination adjustment, allowing for east or west declination settings up to 180 degrees. This feature compensates for the difference between true north and magnetic north, ensuring accurate readings. Consult a local topographic map or reliable source for the current magnetic declination of your area.

Figure 2: Close-up view of the compass dial, highlighting the magnetic declination adjustment mechanism.

3. Leveling the Compass

For accurate readings, the compass must be perfectly level. The ComPro Pocket Transit includes both a circular bubble level and a long bubble level. Use these to ensure the instrument is horizontal before taking any measurements.

Figure 3: The compass face showing the circular and long bubble levels, essential for precise leveling.

Operating Instructions

1. Taking Azimuth Bearings

To take an azimuth bearing, hold the compass at eye level, ensuring it is level. Sight through the sighting wire and mirror to align the target with the center of the mirror. Read the azimuth directly from the compass dial. The 0-360 degree scale provides full circle readings.

Figure 4: A user demonstrating the proper technique for holding and sighting with the Brunton ComPro Pocket Transit in an outdoor setting.

2. Measuring Vertical Angles (Clinometer)

The built-in clinometer allows for accurate measurement of vertical angles, such as slopes or dips. Hold the compass on its side, aligning the base with the surface or line of sight. Use the long bubble level to ensure accuracy and read the angle from the clinometer scale.

3. Using the Sighting Mirror and Wire

The precision-aligned mirror with a see-through sighting mechanism enhances accuracy for both horizontal and vertical measurements. The sighting wire helps in precise alignment with distant objects.

Figure 5: The Brunton ComPro Pocket Transit opened to reveal the sighting mirror and wire, crucial for accurate targeting.

4. Product Overview and Manufacturing Process

For a visual overview of Brunton products and a glimpse into their manufacturing process, including the dedication and craftsmanship involved, please watch the official video below. This video highlights the precision and care taken in producing these instruments.

Maintenance

1. Cleaning and Care

Keep your Brunton ComPro Pocket Transit clean and free of debris. Use a soft, damp cloth to wipe down the exterior. Avoid abrasive cleaners or solvents that could damage the finish or optical components. For the sapphire jewel bearing and NdFeB magnet, no special user maintenance is required beyond keeping the instrument clean and protected from strong magnetic fields.

2. Storage

When not in use, store the compass in its protective case to prevent scratches and impacts. Store in a dry environment away from extreme temperatures. The compass comes with a durable leather pouch for protection during transport and storage.

Figure 6: The Brunton ComPro Pocket Transit securely stored in its custom-fit leather pouch, designed for protection.

Troubleshooting

• Needle Sticking or Sluggish Movement: Ensure the compass is perfectly level. Check for any metallic objects nearby that might interfere with the magnetic needle. If the issue persists, the internal mechanism may require professional servicing.
• Inaccurate Readings: Verify that the magnetic declination is correctly set for your current location. Ensure the compass is level and free from magnetic interference. In some regions, significant magnetic dip may affect needle movement; ensure the compass is designed for global use or consider regional variations.
• Fogging Inside: While the compass is designed with waterproof O-ring seals, extreme temperature changes can sometimes cause temporary internal fogging. If persistent moisture or water ingress is observed, the seals may be compromised, and professional repair is recommended.

Specifications

Warranty

This product is covered by a Standard Manufacturer's Warranty. For detailed information regarding warranty terms, coverage, and claims procedures, please refer to the warranty documentation included with your purchase or visit the official Brunton website.

Support

For further assistance, technical support, or inquiries regarding your Brunton ComPro Pocket Transit, please contact Brunton customer service. You can find contact information and additional resources on the official Brunton website or through their Amazon Brand Store: Brunton International LLC Store.