Prism; Figure 4-5. Parts Of The Prism - Fluke 830 User Manual

830
Users Manual

Prism

The prism is mounted on the shaft or solid coupling of the machine to be moved.
It reflects the laser beam back into the position detector as the shafts are rotated.
The locking lever flips into the horizontal position, facing forward, to hold the
prism in place on the bracket posts. The prism is adjusted by changing its vertical
position and its horizontal angle (using the thumbscrews) so that the beam is
reflected directly back into the sensor.
Vertical position
adjustment
thumbwheel
90° roof prism
The prism must be kept clean. Use the lens cleaning cloth or a fine dusting brush
such as that normally used to clean other optical devices.
Avoid vigorous polishing to preserve the anti-reflective coating. Keep
the dust cap on the prism when it is not in use.
20
Measure mark = center of posts
Horizontal angle adjustment knob

Figure 4-5. Parts of the prism

Caution
Quick release
lever