Johnson Level & Tool Mfg. 40-6660 - Manual (Page 8)

8 ©2007 Johnson Level & Tool
2. Activate the horizontal line H, vertical lines V1 and V2, and plumb-
down point by pressing the corresponding keys on the operating
panel (Fig. 3).
1. Horizontal Line H Button
2. Vertical Line V1Button
3. Modulation Switching P Button
4. Power Indicator Lamp
5. Vertical Line V2 Button
6. Modulation Switching Indicator Lamp
3. When the power indicator lamp is lit, this means the laser is
turned on. When the blinking power indicator lamp is lit, this
means low battery voltage.
4. If the instrument is set up on a slope beyond the self-leveling
range, the laser will flash and with an audible sound at the same
time. Users should reset up the instrument to a more level posi-
tion (with the aid of the vial on top).
5. When the horizontal line H, vertical line V1 and V2 are all lit,
these three laser lines form four cross intersections.
Among them, the top intersection
is the plumb-up point of the unit,
which constitutes plumb beam
together with the plumb-down
point. Three intersections on the
horizontal line is the horizontal
cross lines perpendicular to each
other (Fig. 4).
Top cross
V1
Horizontal
cross
V2
V2
Horizontal
cross
V2
H
H
Plumb-down
Point
Fig. 4