Fine adjustment
Using the adjusting screw, the upper part can be rotated through ± 5° around
its vertical axis, enabling a vertical laser line to be aligned precisely with a
reference line. With the LA-180L, the fine adjustment procedure can also be
undertaken using the receiver.
Vertical check
1. Vertical accuracy check
You must create a reference to perform this test. Fasten a plumbline near to the
wall. The laser unit should now be set up in front of this reference
mark(distance Y) and the vertical laser line compared with it.
The discrepancy between the centre of the laser line of
the multi-line laser and the reference mark should be no
greater than 1 mm / 3/64“ from the reference mark over
a length of 2.8 m / 11 ft . This vertical check should be
undertaken separately for all vertical laser lines.
2. Checking plumb-lining
1. Set up the instrument
2. Switch on the instrument - button (1a)
3. Switch on the vertical laser lines - button (1d)
4. Place the laser so that its down beam is aligned over
a reference mark on the floor.
5. Mark the position of the laser cross on the ceiling.
6. Rotate the laser through 180° and realign the laser beam on
the reference mark on the floor.
7. Mark the position of the laser cross on the ceiling.
8. Measure the differences in the x and y directions between the two marks on
the ceiling. The difference is twice the actual error. In each case the difference
may not be greater than 4 mm in 6 m / 5/64“ in 10 ft .
Operating mode without levelling function.
Button (1b): the levelling function is switched off.
In this mode the laser lines flashes. Flashing frequency: rapid
Checking the calibration
The LA90L / LA180L multi-line laser was designed for use on construction
sites and was perfectly adjusted when it left our factory. As with any precision
instrument, however, its calibration must be regularly checked. The unit should
be checked before starting any new tasks, particularly when the unit has been
exposed to strong vibrations. After an impact, the unit should be checked
throughout its whole self-levelling range.
F
D1
D2
D3
E1
E2
1 mm
3/64“
Summary of Contents for LA 180L
Page 1: ...LA 90L LA 180L Operating instructions en ...
Page 2: ...A 3a 3b 4 5 6 7 8 LA 180L ...
Page 3: ...1d 1c 1a 1b 2b 2a B LA 180 L LA 90 L C A1 ...
Page 4: ...E1 E2 D1 90 2 8m D2 1 1 2 E3 1 2 D D X Y F 5 11 ft 3 1 3 ft Y Y 1m ...
Page 5: ...1 A G4 2 B 1 A 2 B 1 A 2 B 2 3 S 5 m 16 ft 3 1 3 G1 D3 2 8m G5 G3 G2 11 ft ...
