ASTRO-PHYSICS 900 German Equatorial 매뉴얼 - 페이지 3

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BEFORE YOU LEAVE HOME

Since most of us must set up our instruments in the dark, in the cold or while battling mosquitoes, a bit of preplanning

and organization is important. There are a few simple things that can be accomplished in the comfort of your home

before heading outside.

GROSS LATITUDE ADJUSTMENT: The latitude range of the 900 mount is approximately 20-68 degrees. Since most

astronomers typically observe within one latitude range, this adjustment is made just once, if at all. Prior to

shipment, we preset the mount to your latitude range for your convenience. If you travel to another observing

location, determine the latitude of your observing site and make the appropriate adjustment.

The four positions for the altitude adjustments have the following ranges:

52 degrees to 68 degrees latitude – top position

41 degrees to 59 degrees latitude – third position

30 degrees to 45 degrees latitude – second position

20 degrees to 34 degrees latitude – bottom position

How to change the position of the altitude adjuster bar

1. Use only the R.A. axis. DO NOT attempt to make these adjustments with the declination axis in place and certainly

not with an instrument fully mounted.

2. Loosen both altitude-locking knobs about one

turn.

3. Locate the side of the polar axis that does

not have the motor/gear housing box.

Loosen (about one turn) the polar axis pivot

screw and altitude adjuster bar fixing screw

on this side only. With your hand, push the

polar axis upwards so that the altitude

locking knobs are positioned at the top of the

altitude slot (this is the maximum altitude

position). Some resistance will be felt with

this operation as you are pushing against the

weight of the polar housing and the

resistance of the remaining polar axis pivot

screw (which has not been loosened).

4. Before attempting to move the altitude

adjuster bar, you must tighten the altitude-

locking knob on the motor/gear housing side.

This will prevent any downward movement of

the polar axis during positioning of the

altitude adjuster bar.

5. While supporting the altitude adjuster bar,

remove the two screws that support it on

either side, but keep the two ends of the bar

in contact with the side of the mount, don't

remove it completely (this tip is for your

convenience).

6. Guide (wiggle) the bar to the desired

position, insert the screws in both ends and

lightly tighten so that you still have some

ability to move the bar.

7. Note that the altitude adjustment knob is

attached to a threaded rod that travels

through the altitude adjuster bar. Turn the

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