Before Setting Up Your Instrument; If Setting Up Over A Point - David White L6-20N Owner's Manual

2. Before setting up your instrument, loosen the clamps. If using
the level-transit, be sure the telescope lock lever is in the closed
position. Attach the instrument to the tripod securely, hand tight-
ening the tripod mounting stud to the instrument base. If setting
up over an exact point, read step 3; otherwise, continue to step 4.
3. If setting up over a point, use a plumb bob to center on the
exact point. To hang the plumb bob, attach cord to the plumb bob
hook on the screwdriver-style handle of the tripod. Knot the cord
as illustrated.
Move the tripod and instrument over the approximate point. (Be
sure the tripod is set up firmly again, as described in step 1.) Shift
the instrument on the tripod head until the plumb bob is directly
over the point. Then set the instrument leveling screws as
described in step 4.
1. Move tripod and
instrument over the
approximate point.
2. Shift the instrument
to line up plumb bob
exactly.
6
Hanging the
plumb bob.
To hang the plumb
bob, attach cord to
the plumb bob
hook on the tripod
and knot the cord
as illustrated.