Sokkia 30R Series Operator's Manual page 156

27. STANDARD EQUIPMENT AND OPTIONAL ACCESSORIES
Tubular compass (CP7)
Slide the tubular compass into the
tubular compass slot, loosen the
clamp screw, then rotate the top part
of the instrument until the compass
needle bisects the index lines. The
telescope's face left sighting
direction in this position will indicate
magnetic north. After use, tighten the
clamp and remove the compass from
the slot.
• The tubular compass is susceptible
to the influence of nearby magnets or
metal. Such influence could cause it
to fail to accurately indicate magnetic
north. Do not use magnetic north as
indicated by this compass for base
line surveying.
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.
Handle
The carrying handle can be removed
from the instrument. To remove it,
loosen the handle securing screw
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