Error-Angle of the Precision Level Status is Invalid for the Laser Tracker

The Angle of the Precision Level is read in real time and will always fluctuate.  The status of this value is usually “Invalid”, even on a properly working tracker.  This value is only valid when the tracker's Zenith axis is physically in an orientation that allows the tracker's Precision level to perform a level measurement.

There is only about a small angular range of the Zenith axis where this can occur, which, when the tracker is properly leveled out using the Electronic Bubble Level, is when the Zenith axis is at 90 degrees or pointed straight out.  Most times when looking at this page, the Zenith axis is not between these angles and therefore has a status of “Invalid”.  If the tracker's Zenith axis it at this range on a tracker leveled out using the Electronic Bubble Level and cannot maintain or obtain a “Valid” status, precision level measurements will not be able to be performed.