Automet® FAB - Control Capture Methods
Overview
Control observations can be recorded using three distinct capture methods depending on survey area dimensions and available hardware. All three techniques can be used interchangeably within a single survey.
In all methods, control point naming and observation order are handled automatically by automet® FAB.
Method 1: Start Capture (Continuous Prism Tracking)
Ideal for small survey footprints when operating with a single 44 mm prism ball.
- Mark positions: Outline each control magnet using a permanent marker pen so points can be re-established if disturbed.
- Automated routine: Press Start capture, move the prism ball sequentially across each control magnet, and allow the software to record observations automatically.
- Prism specification: Requires a standard 44 mm diameter prism ball.
Method 2: Capture Single Point Using Prism Balls
Recommended for expansive survey areas where control points are widely spaced and dedicated prism balls are mounted on every magnet.
- Mark positions: Outline each control magnet using a permanent marker pen.
- Sighting: Sight the instrument telescope toward each control prism ball.
- Observation: Ensure target mode is set to Prism, then press Capture single to record each observation.
Method 3: Capture Single Point Using Reflectorless Laser
Used when magnetic bases or prism balls cannot be installed. This method uses direct reflectorless laser measurements to fixed physical targets. While slightly slower and less precise than prism ball observations, it provides a reliable secondary option.
- Target installation: Apply adhesive crosshair targets or paint target marks onto surrounding structural steelwork.
- Sighting: Sight the instrument telescope precisely onto the target center point.
- Observation: Ensure target mode is set to Laser, then press Capture single to record each observation.