Explain temporary adjustment.

Explain temporary adjustment.
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1 Answer

Answer :

1) Place the telescope parallel to foot screw (fig. a)

2) Bring the bubble at Centre by moving foot screw inward or outward simultaneously.

3) Then turn the telescope through 900 so that it lies on third foot screw (fig. b)

4) Then turn this foot screw until bubble is centered

5) Now rotate the instrument through 3600 and check the position of bubble and repeat the procedure till in both positions, bubble will remain at center.

6) Once both positions give centered bubble, leveling of instrument is said to be completed.

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