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5. OPERATION
5.1 MEASURING HEIGHT DIFFERENCE
1) Set up the instrument at a point approximately
halfway between points A and B. The reticle
stadia lines can be used to optically compare
the distances. (See "5.3 MEASURING DIS-
TANCE USING THE STADIA LINES".)
※
For more accurate measurement, set the instru-
ment as close to halfway as possible, to elimi-
nate errors due to sighting axis misalignment.
Fig.5.1
2) Position the staff vertically at point A.
Take the reading a (backsight) on the staff at
point A.
3) Then sight the staff at point B and obtain the
reading b (foresight).
4) The difference a - b is the height difference h of
B from A.
Example:
h = a - b = 1.735m - 1.224m = 0.511m
Содержание C300
Страница 1: ...SURVEYING INSTRUMENTS C300 C310 C320 C330 自動レベル Automatic Level 取扱説明書 OPERATOR S MANUAL ...
Страница 2: ...SURVEYING INSTRUMENTS This is the mark of the Japan Surveying Instruments Manu facturers Association ...
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Страница 56: ...第 4 版 05 0806 4th ed 05 0806 Printed in China 2004 SOKKIA TOPCON CO LTD ...