Kipp&Zonen SOLYS 2 Sun Tracker - Manual (Page 33)

Unscrew the cap from the sun sensor connector on the underside of the SOLYS 2 and connect the sensor
connector. Before inserting the cable please check if the CHP 1 is perfectly aligned and the m8 bolts are
secured!
When the sun sensor is connected for the first time, the tracker will reset (go to its home position) and
return and starts using the sun sensor. Now its needs to be aligned. (See chapter 4.6.1)
4.6.1 ALIGNMENT OF SUN SENSOR
This section applies only if you have purchased the optional Sun Sensor to operate in conjunction with the
SOLYS 2. It is advised to have the SOLYS correctly tracking the sun before adjusting the sun sensor.
The sun sensor can only be aligned when the direct radiation is above 300 W/m
2 . This can be checked by the
status LED. When the sun sensor is connected and the status LED is green the radiation is above 300 W/m 2 ,
when blinking the radiation is too low to align the sun sensor. Once the sun sensor is connected and the
direct radiation is above the 300 W/m
2 it will correct the tracker position. The initial position of the sun
sensor as indicated in figure 4.25 should be 23 mm (25 mm for old models) from the Pyrheliometer
mounting clamp. This initial adjustment is important; otherwise the sun sensor is too far off to find the sun.
When enough sun is present the sun sensor can be fine-tuned. The correct position can be obtained from the
alignment target of the Pyrheliometer. If no Pyrheliometer is present the alignment target of the two
mounting brackets can be used. Both brackets have a hole and the light beam falling through the first hole
should make a circle just around the second hole. The information from the sun sensor is updated every 10
seconds, so after a changed alignment this interval should be waited before the new position is affected. Of
course when the green status LED starts blinking no further adjustments are possible because the direct
radiation is too low. The position of the sun sensor has to be adjusted using the 3 screws that hold the sun
sensor in place. It is best to start adjusting one of the screws half a turn to see the effect. If the sunspot
moves further away from the target, the direction of rotation should be reversed. Every time wait 10 seconds
for the SOLYS 2 to update its position according to the new sun sensor angle. Adjust all three sun sensor
screws until the alignment target is exactly positioned at the sun.
When the sun senor is disconnected the SOLYS 2 has to recalculate its position and will first move to the
home position before starting tracking again. When reconnected the sun sensor information will be used
directly (after 10 seconds) when the status LED is constantly green.
The position information from the sun sensor is not stored because the misalignment can be different for
different positions (different times of the day). The sun senor will start every day with active tracking when
the direct radiation is above the 300 W/m
2