Target System - Sokkia iM-50 Series Operator's Manual

37.TARGET SYSTEM

Select a prism or a target depending on your purpose. The following are all special accessories (sold
separately).

• When using a reflecting prism equipped with a target for distance and angle measurements, be sure to direct
the reflective prism correctly and sight the center of the prism target accurately.
• Each reflective prism has its own prism constant value. When changing prisms, be sure to change the prism
constant correction value.
Reflecting Prism System (AP Series)

Use an appropriate system for iM.
The figure on the right is an example.
Because all reflecting prisms and accessories have standardized
screws, it is possible to combine these prisms, accessories, etc.
according to your objectives.
Prism constant correction value : -40 mm (used alone)
Aperture
Pinpole prism (OR1PA)

Prism constant correction value : -30 mm (used alone)
Aperture
Reflective sheet target (RS series)

Prism constant correction value : 0 mm
Aperture
2-point target (2RT500-K)

This target is used for two-distance offset measurement.
Prism constant correction value : 0 mm
Aperture
Instrument height adaptor (AP41)

This device is used to adjust the height of the target.
Make sure that the instrument height "239" (mm) is displayed in the
instrument height adjustment window.
1. Install the tribrach to the instrument height adaptor.
2. Level the instrument and check the position of the bubble of the plate
level.
: 58 mm
: 25 mm
: Target size
: 50 mm
208
Height adjustment
window