Sokkia 130R Series Operator's Manual page 164

30. STANDARD EQUIPMENT
Plumb bob
The plumb bob can be used to set up
and center the instrument on days
when there is little wind. To use the
plumb bob, unwind its cord, pass it
through the cord grip piece as shown
in the figure to adjust its length, then
suspend it from the hook attached to
the centering screw.
Tubular compass (CP7)
To mount the CP7, slide it into the
tubular compass slot. To use, loosen
the clamping screw to free the
compass needle. Turn the
instrument in the face 1 position until
the compass needle bisects the
index lines. The telescope will be
nearly aligned with magnetic north.
After use, tighten the clamp and
remove the compass from the slot.
Place it in the specified position in
the carrying case.
Magnetism and metal will influence the
tubular compass,making it incapable
of projecting true magnetic north. Do
not use the magnetic north indicated
by this compass for base line
surveying.
156
Tubular
compass
slot