Figure 2-22. Optical plummet, adjustment.

TM 5-6675-306-14

STEP 1.

REFER TO PARAGRAPH 2-2 AND SET UP THE

THEODOLITE.

STEP 2.

OBSERVE STATION POINT THROUGH OPTICAL

PLUMMET EYEPIECE. IF STATION POINT IS NOT

CENTERED IN THE EYEPIECE CIRCULAR MARKS,

USE ADJUSTING PIN (FIG. 2-5) TO TURN THE

TWO HORIZONTAL ADJUSTING SCREWS FOR

LATERAL

ALIGNMENT.

FOR

VERTICAL

ALIGNMENT, LOOSEN CHECK NUT AND TURN

VERTICAL ADJUSTING SCREW.

STEP 3.

WHEN THE STATION POINT IS CENTERED IN THE

EYEPIECE CIRCULAR MARKS, TIGHTEN THE

CHECK NUT.

Figure 2-22. Optical plummet, adjustment.

2-10. Operation of Theodolite

c. Install the diagonal eyepieces as necessary

a. Set up the theodolite on the tripod (para 2-

2).

d. Install the telescope eyepiece black sunglass

b. If necessary, install the illumination system

as necessary (para 4-24).

e. Perform the daily preventive maintenance

NOTE

f. Refer to figure 2-23 and level the theodolite.

To operate the illumination system, turn the

rheostat knob until desired brilliance is obtained.

Place the hand light switch in the ON position.

2-33

Index