Cooper Hand Tools LUFKIN LCL4 - Manual (Page 7)

Page 7
OPERATION
Figure 1
Figure 2
Figure 3
Pendulum Lock
The LCL4 is a precision instrument and should be treated with
care. When not in use, the pendulum should always be in the off
position (figure1). Locking the pendulum allows the LCL4 to better
withstand vibrations and shock incurred during transportation or
if the unit is dropped.
Locked Line Angle
In the locked line angle position (Figure 2), the pendulum is
locked and will not automatically level or plumb the lines. When
in the locked line angle position, both the horizontal and vertical
beams will be on to allow angled lines. The green LED will blink
once per second.
Note: The unit will not change between Level Line Mode and
Plumb Line Mode while in the locked angle position.
Automatic Levelling
When the switch is in the pendulum unlock position (Figure 3) then the pendulum will
automatically level and plumb the horizontal and vertical lines, so long as the base is within
5º of true level. When the base is more than 5º out of level then the lines will flash once per
second accompanied by a warning beeping from the unit.
If the device is left out of level for more than 3 minutes then it will switch off. To reactivate
the unit, switch it off and then back on again.