LaserLiner AL 26 Plus Manual Del Usuario página 11

Remaining inclinations of the crosshairs which are left after the levelling
bubble has been centred will be eliminated by the compensator. The
!
compensator, however, will not eliminate any inclinations caused by
faulty calibration of the levelling bubble or the crosshairs. Therefore,
the positions of both gadgets should be checked before measuring
(see calibration).
Determination of a height difference
2
1. Place instrument halfway between
the positions of staves A and B. Aim
instrument at staff A and read the
value of the graduation of the staff
at your crosshairs (e.g. A = 140 cm).
Turn instrument towards rod B and
get the reading from the graduation
(e.g. B = 90 cm).
2. The difference (A-B) results in
a height difference H = + 50 cm
between B and A. The point B is 50 cm higher than point A.
The difference H turns negative when point B is lower than point A.
Distance determination
3
1. Read values of the upper graduation mark (0 =1,44 m)
and the lower graduation mark (e.g. U = 1,36 m).
2. Multiply the difference by the factor 100
(E = 100 x e), the result is the distance E = 8 m.
!
To achieve reliable results make sure the levelling staff is precisely
aligned vertically.
AL 26 / 32 Plus
A
½L
B
½ L
O=1,44 m
14
e
U=1,36 m
EN
11