1. Choose a suitable test center to ensure that the venue is flat and spacious, free from obstacles and personnel.
2. Place the crane on the test site, and lift the hook to the highest point, so that the hook is suspended.
3. The staff is standing under the crane, holding a test stick (3-4m in length) so that the bottom of the test stick is close to the ground and the test stick is vertical.
4. Stabilize the test rod, let the crane start running, and observe the swing of the test rod. The test rod should be stable, and the obvious shaking or swinging of the test rod indicates that the crane is unstable and needs to be stopped in time for inspection and adjustment.