User's Manual

115
Calibration
1. First, take down the reticle cover between telescope
eyepiece and focusing hand-wheel, and you can see four fixed
screw of the reticle bed (sees attached figure);
2. Unscrew the three fixed screw evenly with screwdriver,
rotate the reticle around collimation axis, to make A point on the
vertical line of the reticle;
3. Tighten the screw evenly, test the calibration results with
the above methods;
4. Cover the reticle.
Fixing screw
Eyepiece
13.4 The Perpendicularity of Collimation axis and
Cross axis (2C)
Check
1. Set a target A in about 100m away, and make sure the
vertical angle of the target is within ±3°.Precisely level the
instrument and switch on it;
2. Make the telescope focused on target A in face left, and
read the horizontal angle e.g. HA (L)=10°13′10″;
3. Loosen the vertical and horizontal brake hand-wheel,
turn the telescope, rotate the alidade to face right and focus on
the same target A. Before aiming please tighten the horizontal