Makita SK20SP instruction manual Inspection of the leveling accuracy of the laser level

Inspection of the leveling accuracy of the laser level

Check the leveling accuracy of the unit (laser level) periodically in the following manners:

Fig. 7

1.Check the leveling accuracy of horizontal laser-beam line.

1)Place the unit on the floor of an indoor corner at the point of 3 to 5 m from the one wall and 1 m from the another one. (See the Fig.7) Turn the level adjusting ring (9 ) so that the air-bubble in the round vial (4) is centered.

2)Turn on the power switch (12).

3)Turn the unit and mark both ends of laser line projected on the both walls.

4)Then turn the unit on both sides. Make sure that half of the deviation from laser line to the first marked point is within the leveling accuracy specified.

2.Check the leveling accuracy of vertical laser-beam line.

2)Turn on the power switch 12. Then press the V button.

3)Direct the vertical laser line to the string of plumb-bob. Then adjust the vertical laser line to the lower end of the string. Make sure that deviation from the vertical laser line to the upper end of the string is within the leveling accuracy specified.

Fig. 8

1)Hang a plumb-bob (See the figure 8) from 3 m height of the wall (the height of ceiling is approx. 3 m).

Place the unit on the floor at the point of 2 to 5 m away from the wall. Make sure that the air-bubble is centered in the round vial (4).

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