95
"A x Bx" method
From the center
procedure:
Instrument positioned in the center of the staffs and close to staff B (inside or outside). a = approx. 30m.
DNA03_Nivellierprobe_1
1
1
st
Position
2
2
nd
Position
A
Staff A
B
Staff B
Conditions on the distances:
1. Station
The center has to be within an accuracy of +/-1 m
2. Station
b
≥
2.5 m
A
B
1
2
1/2
1/2
a
b
min.
2.5 m