What does the "Mirrors Blocked" error mean?

When this error appears on your screen, it is likely referring to the four mirrors and lenses that need to be clear for the tool to calibrate itself. It is very likely that if you take light cloth to clear these mirrors that you will be able to clear this error.

Please inspect the lens (1), the collimator (2), and the two calibration mirrors (3). These locations run your calibrations and measurements as the tool is being used, and if anything (usually water or dust) is inhibiting them, it could lead to calibration and measurement failures.

Please remember that if the telescope has fog inside the tool, please see this article on how to slowly remove any moisture that has collected internally on the lens of the tool.

Are there handling measures I need to be aware of when using the PLT 400?

Yes. The PLT 400 is an instrument that uses advanced technology to be accurate in your layout. It is important that, in general, the tool is handled delicately and is in a location that it will not fall. In addition, keep the tool stored in its case when not in use.

Protecting the Telescope on the Vertical Axis

Remember that the tool spins on both a horizontal and vertical axis. For the vertical axis, specifically, there is an "end stop" that, if jammed too hard, can damage internal cabling of the tool for the telescope. Such damage will cause field calibrations to fail.

Be delicate as you spin the tool vertically, and be aware as you approach the "end stop." The end stop is found at the location where the tool's front-facing lens is facing down.