Kipp&Zonen 2AP Sun Tracker - Manual (Page 52)

INSTALLATION AND SETUP
51
4.6.3 Start Suntracking
The time, location and pressure parameters are the necessary variables for the 2AP to calculate the
sun’s position in the sky, see figure 4.34. It is important that these variables have been entered
correctly and that the 2AP has been levelled properly. A final manual Azimuth correction can be
done during the Sighting Adjustment procedure later on.
Press the "Start Sun Tracking" button to set the 2AP function to "Sun Tracking". The "Following
Sun" indicator will light up green when this process successfully finishes (it will take a couple of
minutes to complete). Refer to the Troubleshooting procedure if "Start Sun Tracking" fails.
Now that all the accessories are installed and the 2AP is accurately levelled and located, one can
move on to the Sighting Adjustment procedure. The Sighting Adjustment procedures with and
without the optional Sun Sensor are different. Due to the selection of the optional Sun Sensor in the
“Post Delivery Check” the right procedure (with or without Sun Sensor) will be launched in the
software when pressing the “Sighting Adjustments” button.
4.6.4 Sighting Adjustment without Sun Sensor
This section applies only if you have not purchased the optional Sun Sensor.
The Sighting Adjustment will compensate for errors in the initial position of the 2AP. If, in the Home
Position, the 2AP is not pointing exactly to the East (Azimuth orientation) the Sighting Adjustment
will correct for this. This is a fixed offset. Hence it will correct for levelling inaccuracies of the (Large)
Side Mounting Plates. With the 2AP operating in Suntracking mode the sun can be used as a
pointing reference to visualise any positioning errors.
Notes: During the “Sighting Adjustment without Sun Sensor” procedure continuous sunlight is
required.
The Sighting Adjustment procedure will not compensate for a pointing error due to
levelling inaccuracies of the 2AP.
• Run the Sighting Adjustment procedure from the Main Menu of the Win2AP software.
• If the current 2AP mode shown in the text box at step 1 is not "Suntracking", select this
mode from the right.
• Go to, and finish the “Setting Time and Location” page of the Suntracker Setup Procedure if
the 2AP remains idle.
• Use one of the "Sighting Targets" of the Large Side Mounting Plate Clamps (or even better,
the "Manual Sighting Target" if an optional CH 1 Pyrheliometer is installed). The sun will
project a bright dot onto the Rear Clamp Target. If the Light Dot is not on the Target Hole,
do the following.
• If you have purchased the optional Tripod slightly lift the complete Tracker and turn it to
correct for an Azimuth error (if possible).
• Re-level the 2AP if you moved the 2AP and Tripod, to correct for the azimuth orientation.
• Step 6 of the Sighting Adjustment page can be used to correct for a possible final Azimuth
error and levelling inaccuracies of the Large Side Mounting Plates with the software. If the
Light Dot is close to, but not within the Target Hole, then an initial manual sighting will be
required. The entered corrections are interpreted as an offset.