Configuration Of Astronomical Mode - ABB twa-1 User Manual

Configuration of astronomical mode

It is imperative to do the following settings when installing the clock
according to the geographical location of your project.
You may use the chart provided with the product to help you define precisely
your geographical location.
These data will allow the clock to calculate automatically sunrise/sunset
times.
1. In order to set longitude and latitude,
select the astro mode using the
then validate by enter.
2. Set longitude "Lo" using keys
The setting values range from 180°E (East)
to 180°W (West).
Validate by enter.
3. Set latitude "LAt" using keys
The setting values range from 90°N (North)
to 90°S (South).
Validate by enter.
4. Set the time zone "Udt" using keys
-12.00 to +12.00 compared to the Greenwich
meridian line. UDT (= universal day time).
Validate by enter.
The 2 following steps will allow you to perform a
permanent time correction in order to more precisely
set sunrise/sunset times of your project location.
The range of possible correction is –120 to +120 minutes.
5. Set the time correction of sunset time "RI"
using + and -
+
keys, then validate by enter.
menu
+ and -.
and -.
+ and - :
6