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25.OPPTIONAL ACCESSORIES
The following are optional accessories which are sold separately from the instrument.
C Power supply and target optional accessories: "23. POWER SUPPLY SYSTEM", "24. PRISM
SYSTEM".
I 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.
I 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 1 sighting direction in this position will
indicate magnetic north. After use, tighten the
clamp and remove the compass from the slot.
G
• 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.
I Telescope eyepiece lens (EL7)
Magnification: 40X
Field of view:
1° 20
'
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