Kipp&Zonen 2AP Sun Tracker - Manual (Page 57)

INSTALLATION AND SETUP
56
Figure 4.35: Accepting Tilt Corrections.
Note:
Tilt adjustment may be repeated at any time during operation. This may be desirable if
(for example) the mounting structure shifts due to extreme temperature changes.
4.6.5.4 Time
Correction
Run the Sighting Adjustment procedure in the Main Menu and go to page 4.
When the 2AP has been mounted, levelled, sighted, and tilt corrected properly, the only variable
that remains is the 2AP internal clock inaccuracy. Setting the 2AP in Correcting Time mode will
enable the 2AP to correct for a measured time drift by means of Sun Sensor observations.
There are two Time Correction operating modes one can chose from:
1. Active Time Correction, includes Time Correction mode combined with Active Tracking mode.
2. Correcting Time, includes Time Correction mode combined with Suntracking mode.
Calculation for the time correction is done at night when the 2AP remains idle. Changes to the real
time clock are not made if there are too few observations obtained (such as on a cloudy day) or the
internal clock is accurate.
Note: It is recommended that "Active Time Correction" not be activated until the 2AP has been
accurately levelled, sighted, and tilt corrected.
• To set the Suntracker to Time Correction mode select the desired "Correcting Time" mode
from the list on the right.
• You have now finished the complete 2AP set up for optimal unattended operating
performance as a Suntracker. You may disconnect the PC or go to the Main Menu and
press the "Run Suntracker" button.