Topcon GLS-1000 SERIES, Instruction Manual

Page: 34 / 76

4-11
4 PREPARATION FOR MEASUREMENT
4.8 Target
4.8.1 Selecting the Target Sheet
Select the target sheet (large, medium, small) based on the distance to the object being scanned.
(Target sheet (large) is sold separately)
4.8.2 Assembling the Target
1
Coincide the alignment piece on the lower part of the prism-adapter with the tribrach alignment
groove.
2
Tighten the tribrach fixing lever firmly by turning clockwise.
3
Install the target board in the arrow point as shown in the illustration.
4
Tighten the settlement screw surely.
5
Put the magnetic target sheet on the target board.
At this point, adjust the center marks (4) of the target sheet and the target board exactly.
Target sheet
Distance to the object
being scanned (m)
Large 50-200
Middle 10-100
Small 2-50
Tribrach fixing lever
Prism adapter (Sold separately)
Alignment piece
Tribrach (Sold separately)
Settlement
screw
Center mark
Target board
Target sheet
Center mark