How to Use the Calibration Board for Sewer3D Scans

A calibration board is required to ensure accurate measurements in Sewer3D scans. This guide outlines how to obtain and properly use a calibration board for best results.

Obtaining a Calibration Board

There are two options for acquiring a calibration board:

1. Request a Durable Board
Contact your Account Manager to request a durable, long-term calibration board.

2. Print a Temporary Board
For short-term use:

• Download the calibration board PDF

• Print on 11" x 17" paper at 100% scale

Note: Printed boards are intended for temporary use and should be replaced with a durable version for ongoing inspections.

Using the Calibration Board

For accurate results, follow these guidelines:

• Position Correctly
  Place the board upright and perpendicular to the camera’s center line (field of view)

• Keep It Stable
  Ensure the board is stationary—avoid movement or wind interference

• Ensure Full Visibility
  All calibration targets must be clearly visible within the scan

• Understand Measurement Targets
  The board includes targets at 18 cm, 24 cm, and 30 cm intervals

  

Best Practices

To improve accuracy and reliability:

• Take at least one additional fixed measurement in the field as a backup

• Confirm calibration targets are clearly visible and not obstructed (e.g., by smudges, water droplets, or 360° image seams)

• Replace printed boards with durable versions for long-term use

Need Additional Guidance?

For more detailed Sewer3D scanning workflows and recommendations, reach out to your Account Manager for the full Best Practices guide.