Fluke 180LR User Manual - Page 12

180LR, 180LG Users Manual Check Accuracy of Vertical Laser To check the accuracy of the vertical laser: 1. Find a door jamb that has 2.44 m (8 ft) clearance on both sides of the door. 2. Put a cross mark (mark 1) on the floor centered on the door header. See Figure 6. 3. Put a second cross mark (mark 2) 2.44 m (8 ft) from mark 1. Use the vertical laser to make sure that mark 2 is centered on the door header and intersects mark 1. 4. Put the Product on mark 2 with the vertical laser on. 5. Put a third cross mark (mark 3) on the floor 4.88 m (16 ft) from the Product. Use the vertical laser to make sure that mark 3 is centered on the door header and intersects mark 1. 6. Put a cross mark on the door header above mark 1. 7. Move the Product to mark 3 and align the laser so that it intersects the centers of marks 1 and 2. 8. Put another cross mark on the door header above mark 1. If the first and second cross marks on the door header are the same, the laser calibration is accurate. 9. If the cross marks are not the same, measure the distance between the center points of the two cross marks. If the distance is ≤1.58 mm, the laser is within calibration accuracy. 8