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Circular vial
Circular vial adj. screw
Adjustments
When the bubble of the Circular vial comes off from the center according to check procedure
②, it is necessary to adjust.
Turn the bubble adjustment screw with a hex wrench (L type wrench) and put the bubble in
the center of the circle.
● Tighten the screws equally after the above adjustment.
10.3 Vertical reticle
Checks
①Set the instrument up the tripod and carefully level it.
②Sight the target Point A with telescope.
③Using the telescope fine adjustment screws, move Point A to the edge of the field of view
by screw (point A’).
④No adjustment is necessary if Point A moves along the vertical line of the reticle.
Adjustments
①If Point A is off from the vertical line of the reticle, first remove the eyepiece cover.
②Using the adjusting pin, loosen the four reticle adjustment screws slightly loosening each
screw by the same amount, and then rotate the reticle line around the sight axis and align
the vertical line of the sight axis with Point A’.
③Tighten the reticle adjustment screws again by the same amount, and repeat the check to
make sure the adjustment is correct.
Bubble adjusting screw
Plate level
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