LaserLiner AL 22 Classic Manual De Instrucciones página 11

Staving out a height
3
1. Place the staff on a point with a
known height. Read value (A) from
the graduation (A = 90 cm) Add the
read value to the height of the known
point. Now deduct the height of the
point to be staved out from this value
(height on the crosshairs). H + A - x = B
2. Keep moving the levelling staff vertically until the calculated difference B
can be read on the graduation. Afterwards, mark the height of the toe of
staff.
Distance determination
4
1. Read values of the upper graduation mark (0 =
1,44 m) and the lower graduation mark (U = 1,36 m).
2. Multiply the difference by the factor 100
(E = 100 x e), the result is the distance E = 8 m.
In order to get reliable results, the following rules should be obeyed:
– make sure the distances to
!
the aims are equal
– see to an exact vertical
positioning of the staff
Angle measurement
5
1. Attach the string of the plumb bob to the hook and then place the tripod
over the point in a way that the plum bob is already close to the point. The
top of the tripod should be as horizontal as possible. Tread legs of tripod
firmly into the ground.
2. Attach instrument to tripod and fix it. Now centre the plumb bob exactly
over the point by adjusting the lenghts of the tripod legs or by changing
the position of the instrument on the tripod.
3. With the aid of your iron sights, aim telescope at the first aim, align by
using the lateral fine adjustment. First aim = known point. Now turn
knurled ring until the index and the zero position of the horizontal dial
are congruent (turn dial onto zero).
4. Aim telescope at the second aim and read the angle function
under the index marking.
AL 22 / 26 Classic
A
H=120 cm
– avoid tripod and staff from
sinking into the ground
– avoid reading errors
B
x
O = 1,44 m
14
e
U=1,36 m
GB 11