117
Cross wire correction screw
Eyepiece
Note: Check the photoelectric coaxiality after calibrating.
11.5 Vertical plate index zero automatic
compensation
Checkout
1. After Setting up and leveling the instrument, make the
direction of the telescope consistent with the line between the
center of the instrument and any of the foot screw;
2. The vertical plate index change to zero after switching on
Tighten the vertical brake hand-wheel and the instrument display
the current telescope vertical Angle;
3. Screw the leveling screw towards one direction for
circumferential distance around 10mm, the vertical angle
displayed will disappear through the process and ‘Tilt over!’
appears to the column. It indicates that the inclination of the
instrument is over 3′, which is over the range the instrument was
designed to compensate. Screw the leveling screw back towards
the opposite direction, the vertical angle re-appears on the screen.
It shows that the tilt works well now. Users may observe the
change of the readout about the critical point.
Slowly rotate feet X to 10 mm around in one direction, the
display of the vertical angle will change from changing until
