Calibration Levelling Bubble - LaserLiner AL 26 Plus Manual Del Usuario

Angle measurement
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1. Attach the plumb line to the hook and set up the tripod with the tripod
head such that the plumb is roughly over the ground point. 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. 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.
Calibration
5
Levelling bubble
1. Control: Set horizontal dial onto 0°. Place bubble right
into the centre of the circle on the levelling bubble by turning
the levelling screws (6). Turn telescope through 180°/200 gon.
The circular bubble level is correctly aligned when the bubble
is still in the centre.
2. Adjustment: In case the bubble is now out of the centre
marking, set half of the deviation „a" which is (fi a) by
operating the three calibration screws on the levelling
bubble. After that, adjust levelling bubble by using the
levelling screws, then check calibration by turning the
whole instrument through 180°/200 gon.
3. Repeat control and calibration until the bubble of the
levelling bubble remains in the inner circle after each
turn of the instrument.
The meter needs to be calibrated and tested on a regular basis to ensure
it produces accurate measurement results. We recommend carrying out
calibration once a year.
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EN