Kipp&Zonen 2AP Sun Tracker - Manual (Page 50)

INSTALLATION AND SETUP
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4.6 COMMISSIONING 2AP AS SUNTRACKER
The procedures described in this section are essential to insure good performance during operation.
Commissioning a 2AP covers the configuration with the Win2AP software. This includes setting the
time, setting the location parameters and performance of the final Sighting Adjustments.
4.6.1 Setting the Time
This step configures the 2AP to Greenwich Mean Time (GMT), which is required by the suntracking
algorithm in the firmware. When the command is given, the Win2AP gets the time from the PC
connected to the 2AP. Ensure that you have an accurate time reference at the 2AP installation site.
Greenwich Mean Time or Coordinated Universal Time is the standard time at longitude = 0
º (the
longitude line which goes through Greenwich, England), which is used as a standard around the
world to assist in synchronizing data collection.
There are two options:
1. The PC time can be set to local time,Win2AP will take the local time zone automatically into
account and calculate the GMT.
2. If the 2AP site is in a remote place the time and time zone can be difficult to determine.
Setting the PC time and time zone directly to Greenwich Mean Time will fix the time zone
problem.
Note: To calculate GMT Win2AP relies on the Daylight Saving Time of Windows. Although it is
possible to use the local time option, be aware that this procedure is not perfect. When
using the local time option, ensure GMT is set correctly at the moment of the 2AP set up.
The only way around this is to set the time and time zone directly to GMT.
Set the PC time as follows:
• Click on the Start button on the windows Taskbar.
• Click on Control Panel under Settings.
• Double click on the Date/Time icon.
• Set the time according to your accurate time reference.
• Go to the “time zone” tab and select the appropriate time zone.
Set the 2AP time as follows:
• With the 2AP power on and communications connected to the correct serial port, start the
Win2AP program.
• Go to the “Setting Time and Location” page in the Suntracker Setup Procedure .
• Press the “Get 2AP Time” button.
• In the text box on the right the time difference between the PC and the 2AP is shown.
• The difference in time must not be more than 10 seconds.
• Press the “Set 2AP Time” button to adjust the 2AP time to the PC time.