Topcon GB-500, Operator'S Manual

Page: 79 / 120

Appendix A
P/N 31-050506-01 www.topconpositioning.com
A-1
B
ase Checks &
Adjustments
NOTICE
NOTICE
Your kit may not include one or more of the devices
mentioned in this chapter. Contact your Topcon dealer
for more information on purchasing any of these devices.
Pointers on adjustment:
1. Adjust the eyepiece of the telescope prior to any checking
operation that involves sighting through the telescope.
Remember to focus properly, with parallax completely
eliminated.
2. Carry out the adjustments in the order of indicated, as the
adjustments are dependent one upon each other. Adjustments
carried out in the wrong sequence may nullify previous
adjustment.
3. Always conclude adjustments by tightening the adjustment
screws securely; but do not tighten them more than necessary,
to prevent striping the threads, twisting off the screw, or placing
undue stress on the parts.
Furthermore, always tighten by revolving in the direction of
tightening tension.
4. Tighten the attachment screws sufficiently, upon completion of
adjustments.
5. Always repeat checking operations after making adjustments,
in order to confirm results.