Adjustment Of Vertical Index Difference (I Angle) And Vertical - Horizon Fitness HTS-580 Series Operation Manual

Rotate the above screw to its original position, and the instrument display
screen will show the vertical angle again, meaning that the vertical index difference
compensation function is working.
Adjustment
If the compensation function is not working, send the instrument back to the
factory for repair.
12.6 Adjustment of Vertical Index Difference ( i angle)
and Vertical Angle 0 Datum
Inspect the item after finishing the inspection and adjustment of item 13.3 and
13.4.
Inspection
1. Power on after leveling the instrument. Sight object A in left position and
read the
Verticail angle value L.
2. Rotate the telescope. Sight object B in right position and read the Verticail
angle value R.
3.If the vertical angle is０°in zenith,，ｉ＝(Ｌ＋Ｒ－360°)／２
If the vertical angle is０°in horizonｉ＝ (Ｌ＋Ｒ－180°)／２ or (Ｌ＋Ｒ－
540°)／２。
4. If ｜ｉ｜ ≥10" set the Vertical Angle 0 Datum again.
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