How to calibrate a laser distance meter

The laser distance meter steps are as follows

1. Check whether the laser rangefinder is defective.

2. Choose a fixed position, fix the tripod and fix the laser rangefinder on the tripod.

Set the baseline.

3. Fix a target at a distance of about 30 meters, use a laser rangefinder to measure the distance, record the readings, and use a qualified laser rangefinder to record the readings.

4. Move the target distance to 20m and 25m respectively, repeat the measurement 5.3 times and record the reading.

5. Allowable error: 3mm

6. The difference between the three measured values of the off-campus qualified laser rangefinder and the measured value is within the allowable error range.

Calibrate the laser distance meter for calibration.