Adjusting The Reticle - Topcon DL-501 Instruction Manual

21.3

Adjusting the Reticle

The reticle cross-lines can be corrected if out of adjustment. While reading the staff RAB-code, adjust
the reticle by correcting the reference value of the CCD line sensor and then make mechanical
adjustments to the instrument.

• As described in the following procedure, high accuracy readings are obtained by taking repeat
readings of the staff.
PROCEDURE Correcting the reference value of the CCD line sensor
1. Select "Meas" in <Menu>.
2. Select "Check & adjust.".
3. Place staffs a and b approximately 30m apart
and set the instrument halfway between the
staffs (position A).
4. Perform pre-measurement of staffs a and b to
check they are both approximately 15m from
the instrument. Press [OK] to confirm.
5. Measure staff a.
Measurement results are displayed.
6. Press [OK] to accept the results.
21. CHECKS AND ADJUSTMENTS
M e n u
1 . M e a s
2 . M a n a g e m e n t
3 . C o n f i g
4 . C a l c u l a t i o n
M e a s m e n u
1 . H e i g h t d i f .
2 . C h e c k & a d j u s t .
3 . S i m p l e m e a s u r e m e n t
P r e . m e a s .
R h
H d
15m
a
T I L T C N F G
A a b b a
R h 1 . 0 0 5 4 0 m
H d 1 5 . 0 1 0
15m
A b
O K F O C U S
m
S
O K
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