Calibration
After Calibration, the measuring values will be more accurate.
Step 1.
Please make sure all hardware has been properly attached before conducting calibration.
Step 2.
Prepare a sheet of paper: Ideally A4 size, or US Letter Size. If none of those are available, any size will do.
Step 3.
Place the sheet of paper on the ground. And go to the calibration option on the APP.
Step 4.
Select the size of your sheet of paper.
Step 5.
Aim your mobile phone camera at the sheet of paper on the ground.
The distance between the phone and camera to be more than 100 cm.
Step 6.
Hold your mobile phone at an angle parallel to the ground and focus on the cross at the center of the screen.
Step 7.
When the red cross turns green, the laser will automatically turn on and your mobile phone will automatically take a picture.
Step 8.
Confirm that picture is clear and suitable for use.
Step 9.
Confirm that red laser point is within the blue circle.
Step 10.
Drag the 4 red points to the four corners of your sheet of paper.
Step 11.
Press [Ok] to finish.
