Check & Adjust The Line Of Sight - Leica Jogger 20 User Manual

Jogger 20/24/28/32, Operation
3.2
Checking the line
of sight
Check & Adjust the line of sight
Step Description

With the circular bubble centred and
adjusted, the line of sight should be
horizontal.
1. Choose a distance of appr. 30 m
within a gentle terrain.
2. Set up a staff at both final points (A,
B).
3. Set up the instrument at point I
(halfway between A and B, just pass it
down) and centre the bubble.
4. Read both staffs.
Reading on A = 1.832 m
Reading on B = 1.616 m
∆H = A - B = 0.216 m
H=1.832
δ
A
d
003993_001
1
18
H=1.616
δ
I
1
B
d
en