Barbco Pathfinder PF500 Operation Manual page 28

9. Use the vertical adjustment to place the pivot point of the theodolite on the centerline of the
boring machine. An easy way to do this is to place a level or a straight edge across the top of
the thrust frame then measure from the bottom of the level to the pivot point of the
theodolite. A dimple molded into the side cover on the theodolite marks the pivot point. The
measurement for the PF500 is 8-1/4". Lock the adjustment in place by tightening the thumb
screw on the vertical stand.
10. Leveling the theodolite. The bottom round bubble level must first be leveled up by using the three
screw adjustments. Then the top rectangle bubble level must be adjusted the same way.
25 Set Up