Meade LX200 instruction manual Toc 2 Local Time and Date

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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