The Action Of The Instrument; Determination Of Elevation - ADA INSTRUMENTS Ruber-X32 Operating Manual

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RUBER-X32

3) Provide an access to the adjusting screws.

Adjusting screw

Clamping screws

Pic.12

4) If the difference between b2' and b2 is positive (negative), horizontal line should be raised (lowed). To raise/low

horizontal line you should screw/unscrew adjusting screw. Determine new difference value b2'-b2 and if necessary,

repeat the adjustment.

Note: to remove "skew" of reticule loosen clamp screw, turn the ocular.

6. THE ACTION OF THE INSTRUMENT

1) Set up the instrument between the A and B points (Pic.13)

Note: to check the distance use stadia hair of reticule.

For more accurate measurements set up the instrument close to the center of distance between staffs. It helps you to

avoid errors which result from noncoincidence of axis of sight.

2) Set up the staff at A point. Take readings ''a'' (back staff) along the staff at A point.

MEASUREMENT FOUNDATION

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