AccuLine Pro 40-6910 Gebrauchsanweisung - Seite 12

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7/29/09

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Page 12

instrument over point F in accordance with previous instructions.

Rotate the instrument until point E is nearly in line with the vertical

crosshair. Turn tangent screw until vertical crosshair is on point E. By

hand set the horizontal circle to read zero. Swing the telescope

toward point G until the vertical crosshair is exactly on point G. Your

instrument is furnished with a vernier and you will be able to read the

angle closer than a single degree. The use of a vernier is explained

earlier in this manual.

Fig. 9

Fig. 8

In layout work, it is frequently necessary to set off an angle, usually

90º. Assume that the 90º angle HIJ is to be laid off and points H and I

are shown (Fig. 9). Therefore, J is the point you are to set.