Sokkia SRX1, Руководство оператора, Страница: 164 / 184

26. STANDARD EQUIPMENT
156
● Tubular compass (CP9)
Slide the tubular compass into the tubular com-
pass slot, loosen the clamp screw, then rotate the
top part of the instrument until the compass nee-
dle bisects the index lines. The telescope's face 1
sighting direction in this position will indicate mag-
netic 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.