Horizon Fitness HTS-580 Series Operation Manual page 13

the centers of the two leveling screw being adjusted. Turn the leveling screw C to
move the bubble to the center of the circular vial. Recheck the position of the
instrument over the point and adjust if needed.
4). Leveling by using the plate vial
Rotate the instrument horizontally by loosening the Horizontal Clamp Screw
and place the plate vial parallel with the line connecting leveling screws A and B,
then bring the bubble to the center of the plate vial by turning the leveling screws A
and B.
Rotate the instrument 90° (100g) around its vertical axis and turn the
remaining leveling screw or leveling C to center the bubble once more.
Repeat the procedures for each 90° (100g) rotation of the instrument and
check whether the bubble is correctly centered in all directions.
5). Centering by using the optical plummet(or laser plummet)
Adjust the eyepiece of the optical plummet telescope to your eyesight. Slide the
instrument by loosening the tripod screw; place the point on the center mark of the
optical plummet. Sliding the instrument carefully as to not rotate the axis will allow
you to get the least dislocation of the bubble.(Place star-key after power on, then
press F4(LASER)key, press F1(ON)key to turn on the laser plummet. Slide the
instrument by loosening the tripod screw; Place laser facular on the occupied
pointing, Sliding the instrument carefully as to not rotate the axis will allow you to
get the least dislocation of the bubble. The last, press ESC key, and laser plummet
turn off automatically.)
6). Complete leveling the instrument
Level the instrument precisely as in Step 4. Rotate the instrument and check to
see that the bubble is in the center of the plate level regardless of the telescope
13