-12-
5.2 MEASURING HORIZONTAL ANGLE
The horizontal circle graduations are annotated
every 10
°
(360
°
) or 10 gon (400 gon) in a clock-
wise direction. As a result, sighting is performed
from left to right.
1) Use the plumb bob
to set up the instrument
directly above the surveying point.
Fig.5.3
2) Sight point A, and set the horizontal circle
to 0
°
by turning the horizontal circle positioning ring
.
Fig.5.4
3) Sight point B and take the angle reading.
Example: 91.5
°
(or 91.5 gon) in (Fig.5.5) below
.
Fig.5.5
14
11
10
Summary of Contents for C300
Page 1: ...SURVEYING INSTRUMENTS C300 C310 C320 C330 自動レベル Automatic Level 取扱説明書 OPERATOR S MANUAL ...
Page 26: ... 22 メモ ...
Page 51: ... 23 MEMO ...
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Page 53: ... 25 MEMO ...
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Page 56: ...第 4 版 05 0806 4th ed 05 0806 Printed in China 2004 SOKKIA TOPCON CO LTD ...