Meade Instruments LX200 - Manual (Page 23)

Meade Instruments Corporation - Meade LX200 Instruction Manuals
9. Press MODE to go back to Display 2.
10. Press MODE again to go back to Display 1.
It is important to note that the longitude standard used in the LX200 starts at 0° in Greenwich, U.K. and
increases Westerly only to 359° 59mins. Many maps will show Easterly longitudes which cannot be
entered into the Keypad Display. As an example, if your map indicates that you are at an Easterly longitude
of 18° 27mins, then you would enter 341° 33mins.
Do not be concerned with differences in longitude and latitude as they pertain to different map spheroid
projections, those minor differences are too small to adversely affect the longitude and latitude data input.
[ toc ] 2) Local Time and Date.
The local time should be set as accurately as possible, using the
24 hour format. The local time and date are used to determine
sidereal time (star time) and the pointing accuracy of the
telescope will depend on the accuracy of the time entered.
Choose a reliable source as a reference for accurate time such
as your local airport, or telephone company. In the U.S.A. you
can double check the accuracy of the exact minutes by dialing
WWV for the universal coordinated time at (303) 499-7111 (be
sure to enter your local time hour information, not the U.T. hour).
For the example, we will use 4:25:00 P.M. on Jan. 15, 1992.
1. The display should look like Display 1. If it does not, press the
MODE key until it does.
2. Press the MODE key twice. The display will look like Display 8, but with a random LOCAL and SIDE
times.
3. Press and HOLD the ENTER key until the Keypad Hand Controller beeps (display like Display 9).
4. Using the number keys, enter the current local time to within 5 seconds. (Remember, 4:25:00 P.M. is
16:25:00 in the 24 hour format.) Corrections can be made by moving the flashing cursor using the W and E
keys. The display should look like Display 10.
5. Press the ENTER key when the time is correct. The display will change to Display 11.
The next step is to enter the Greenwich Mean Time (GMT) time zone shift. (This procedure is a lot easier
than it sounds.) For users in the U.S.A., refer to the table below to find the GMT time zone shift.
U.S.A. Time Zones
Region Hawaii Pacific Mountain Central Eastern
Standard Time +10 Hours +8 Hours +7 Hours +6 Hours +5 Hours
Daylight Savings Time +9 Hours +7 Hours +6 Hours +5 Hours +4 Hours
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