Johnson Level & Tool Mfg. 40-6510 - Manual (Page 10)

Slope
Figure 3
Gradient (0-4%)
Horizontal
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3. Turn the grade adjusting knob to tilt the level vial in
the Y-direction to desired grade (0%~4%) (fig. 1).
4. Level the vial with the
leveling knob (fig. 2).
5. Start operation (fig. 3).
6. Power off the unit after
operations, and turn the grade
adjusting knob to the 0 position. (fig. 4).
Marking Line Instruction
Note: Level the instrument.
When the instrument is rotating, press the power switch once to acti-
vate the vertical line function. Now the instrument will form a cross with
the rotating laser and vertical laser. Turn the instrument to move the ver-
tical laser. The vertical laser can be positioned within a 360 degree
range. Figure 5 illustrates this feature.
Figure 1
Figure 4
Figure 2