Fluke 830 - Prism; Figure 4-5. Parts of the Prism

830
Users Manual
20
Prism
The prism is mounted on the shaft or solid coupling of the machine to be moved.
It reects the laser beam back into the position detector as the shafts are rotated.
The locking lever ips 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
reected directly back into the sensor.
Figure 4-5. Parts of the prism
The prism must be kept clean. Use the lens cleaning cloth or a ne dusting brush
such as that normally used to clean other optical devices.
Caution
Avoid vigorous polishing to preserve the anti-reective coating. Keep
the dust cap on the prism when it is not in use.
Measure mark = center of posts
Quick release
lever
Horizontal angle adjustment knob
Vertical position
adjustment
thumbwheel
90° roof prism