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38.ACCESSORIES
The following are outlines and how to use standard accessories (not all) and optional accessories.
The following items are explained in other chapters.
Power supply and target optional accessories: "36. POWER SUPPLY SYSTEM", "37. TARGET
SYSTEM".
Plumb bob (optional accessory)
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) (optional accessory)
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.
• 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.
Telescope eyepiece lens (EL7) (optional accessory)
Magnification
: 40X
Field of view
: 1° 20'
Diagonal eyepiece (DE27) (optional accessory)
The diagonal eyepiece is convenient for observations near
the nadir and in narrow spaces.
Magnification: 30X
After removing the handle from the iM, loosen the
attachment screw to remove the telescope eyepiece. Then
screw the diagonal lens into place.
Handle removal method: "4.1 Parts of the Instrument"
210
Tubular
compass slot
DE27
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