Sharp DT-200L Manuel d'instructions télécharger pdf (Page 42)

8.4 Collimation of the Instrument

Collimation is required to make the line of sight of the telescope perpendicu-

lar to the horizontal axis of the instrument, otherwise, it will not be possible to

extend a straight line by direct means.

●

Check

ing

Set the instrument up with

clear sights of about 50 to

60meters

(160 to 200 ft.) on both

sides of the instrument.

Level the instrument

properly with the plate

level.

Sight Point A at

approximately 50 meters

(160 ft.) distance.

Loosen the vertical

motion clamp only, and

rotate the telescope 180°

or 200g around the

horizontal axis, so that the

telescope is pointed in the

opposite direction.

Sight Point B, at equal

distance as Point A and

tighten the vertical motion

clamp.

Loosen the horizontal

motion clamp and rotate

the instrument 180° or

200g around the vertical

axis. Fix a sight on Point

A once more and tighten

the horizontal motion

clamp.

Loosen the vertical

motion clamp only and

rotate the telescope 180°

or 200g around the horizontal axis once more and fix a sight on

Point C, which should coincide with previous Point B.

If Points B and C do not coincide, adjust in the following manner.

Eyepiece

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Sharp DT-200L Manuel d'instructions Page 42

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