Kipp&Zonen 2AP Sun Tracker - Manual (Page 58)

INSTALLATION AND SETUP
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4.7 COMMISSIONING 2AP AS POSITIONER
Determine whether the 2AP is going to be used as a Positioner only or for both the Positioner and
Suntracker purposes. This section, 4.7 Commissioning 2AP as Positioner, is applicable for the 2AP
configuration when the instrument is used as Positioner only. This section also includes extra
information on the different mounting possibilities.
Important: Positioner Information
This section concerns the 2AP set up for Positioner usage only. It is strongly recommended to set
up and configure the 2AP first as a Suntracker if the intention is to use the 2AP for both Suntracking
and Positioning. This is because as a Positioner the 2AP can be mounted and/or configured in ways
that do not apply to the Suntracker purpose.
Important: Gear Drive Restriction
Read section 3.4 to fully understand the consequences of using an older 2AP Gear Drive as a
Positioner after prolonged Suntracker operation.
There are different ways to mount and configure the 2AP for Positioning. Select the purpose and
any purchased optional 2AP accessories in the “Post Delivery Check" of the Win2AP software, see
section 4.1.4.
The sequence of the 2AP electrical connection, mounting the 2AP, levelling the 2AP and installation
of the optional accessories for Suntracker are the same as for Positioner. The main difference
between the set up as Suntracker and Positioner is in:
• the 2AP Azimuth and Zenith orientation, see section 4.7.1.
• the 2AP configuration, sections 4.6 for Suntracker and 4.7 for Positioner.
4.7.1
2AP Azimuth and Zenith Orientation
This section handles the different 2AP travel range options of the Win2AP “Positioner Setup
Procedure” page 1. Among other things you can specify the following Azimuth and Zenith options:
• True Azimuth readings/Azimuth Arbitrary Centre-of-Travel.
• Standard Zenith Range/ Extended Zenith Range.
• Upward/Downward Zenith Range.
Select “True Azimuth readings” if you require positioner readings with respect to 0° North. Select
“Azimuth Arbitrary Centre-of-Travel” if you wish to choose a Centre-of-Travel other than the North.
Setting the Zenith Centre-of-Travel can be done in section 4.7.4.
A standard 2AP has a range of approximately 540° Azimuth and 100° Zenith. These ranges are
most suitable for Suntracking purposes. However, when the 2AP is used for Positioner purposes
only, an increased zenith range of 210° for a Gear Drive could be of more use. Before you choose
this option see section 4.7.3 for full information regarding the extended Zenith range.
As Positioner, there are several possible applications. According to your specific purpose select the
"Upward" or "Downward" Zenith range.