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As illustrated in Chapter 10.8, mark ‘+’ on Point C
, place the tine of the prism pole on the Point C and do not
move during the inspection. Place the two feet tine of Bipod on the cross lines of Point E and F. Adjust the
two legs “e’ and “f” to make the bubble on the prism pole centered.
Set and level the instrument on Point A near the cross. Sight the tine of Point C with the center of reticle,
and fix the Horizontal Clamp Screw. Rotate the telescope upward to make D near the horizontal hair. Flex
the prism pole Leg “e” to make the D in the center of retic
le. Then both Point C and D are on the central line
of reticle.
Set the instrument on Point B to another cross lines. With the same way to flex the Leg “f” to make Point C
and D on the central line of reticle.
Through the adjustment of the instrument on Point A and B, prism pole has been perpendicular. If the bubble
offsets from the center, adjust the three screws under circular vial to make the bubble centered.
Check and adjust again until the bubble is in the center of the vial from both directions of the prism pole.
