Horizon Fitness HTS-580 Series Operation Manual page 238

Adjustment
1. Take off the protective cover between the optical plummet eyepiece and
focusing knob.
2. Fix the paper. Rotate the instrument and mark the indicated point of the
center of the optical plummet on the paper at every 90°. As illustrated: Point A, B,
C, D.
3. Draw lines that attach AC and BD and mark the intersection point of the two
lines as O.
4. Adjust the four adjusting screws of the optical plummet with an adjusting pin
until the center mark coincides with Point O.
5. Repeat the inspection and adjusting steps to be sure the adjustment is
correct.
6. Replace the protective cover.
238