User's Manual

5.5 Vertical Cross-hair on Telescope

1) Check

(1) Set the instrument up the tripod and carefully level it.

(2) Set a point A front the instrument 50m apart;

(3) Collimate the point A and adjust the vertical tangent screw; If the point appears to

move continuously on the hair, adjustment is not required. Otherwise, adjust it.

2) Adjustment

(1) Set the instrument, and set the point A front the instrument 50m apart.

(2) Take off cover of telescope eyepiece, there are 4 screws for the reticle part.

(3) Loosen all four fixing screws slightly with the cross screw-drive.

(4)Revolve the eyepiece section so that the vertical cross-hair coincides to point A, finally,

re-tighten the four screws.

(5) Repeat the checking and adjusting until there is no deviation.

NOTE:

1˅After the adjustment of cross-hair, please check the collimation error and vertical index

error.

2) Refer to the chapter “5.9 EDM Optical Axis and the Telescope Sighting Axis Error” to

check the axis. At last check the collimator error again.