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4. PRODUCT OUTLINE
Instrument height mark
The height of the instrument is as follows:
• 192.5 mm (from tribrach mounting surface to this mark)
• 236 mm (from tribrach plate to this mark)
"Instrument height" is input when setting instrument station data and is the height from the surveying point
(where the instrument is mounted) to this mark.
Laser-pointer function
A target can be sighted with a red laser beam in dark locations without the use of the telescope.
Sighting collimator
Use sighting collimator to aim the iM in the direction of the measurement point. Turn the instrument until
the triangle in the sighting collimator is aligned with the target.
A gun sight is mounted on Face 2 position of the iM-55. Align the telescope to the direction of the target
in such a way that the gun sight is positioned with the target as shown below. Note that you see the target
at a distance from the gun sight.
Horizontal direction
: a position where you can see both the target and back sight at the center of the
front sight’s slit.
Vertical direction
: a position where you can see the tops of the front sight and back sight at the same
height of the target's center.
Detaching/attaching the Handle
The carrying handle can be removed from the instrument when the prism is located at the zenith etc.
1. To remove it, loosen the handle rocking screws.
2. To attache the handle, position the handle as shown, tighten the 2 handle rocking screws securely.
Gun Sight
Target
Front sight
Back sight
Equal intervals
Handle rocking screws
Handle