6.6 Difference of the vertical angle
Inspection
1Set the vertical angle in Zenith 0° mode
2Sight an object (Point P) with the telescope and read the vertical angle (V correct).
3Reverse the telescope and rotate the alidade.
4Sight point P again in the reverse position and read the vertical angle (V reverse).
5At this time, when (V correct + V reverse - 360°)/2 is less than 15”, it is within tolerance. If it shows a larger value,
it needs adjustment - Consult your dealer.
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