Setting Astronomical Data - Theben SEL 173 DCF Operating Instructions Manual

5.3 Setting astronomical data

For commissioning, a reset must first of all be performed. To do so use a pointed
object, e.g. pencil, to press the key RES.
After reset, input the astronomical data longitudinal, latitude and time zone. With
these data the time switch calculates the astronomical switching times for the
whole year and files them in the EEPROM.
Fig. 1: Resetting with a pointed obect
Fig. 2: Setting the longitude. Input is effected within the range -180° (East)
to +180° (West).
Note: You can change the mathematical sign with the key P.
You can correct inputs with the key CL .
Fig. 3: Confirm the longitude with Enter.
Fig. 4: Set the latitude. Input is effected within the ranges -64° to -16° (South)
and +16° to +64° (North).
Fig. 5: Confirm the latitude with Enter.
Fig. 6: Setting the time zone (see time zone card supplied).
Input is effected within the range -12 hours (West) to +12 hours (East).
Fig. 7: Saving inputs. In approx. 20 s the time switch calculates the switching
times for one year.
Fig. 8: The time switch begins DCF synchronization.
If no antenna is connected, set the date and time manually (section 5.4).
Longitude
Confirm
Latitude
longitude
Confirm latitude
Time zone
Save input
(after approx. 20 s)
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