SAFETY, CARE, AND HANDLING

TM 5-6675-312-14

Glass circles

3600

Graduation diameter Hz circle

3.7 in (94 mm)

Graduation diameter V circle

3.11 in (79 mm)

Graduation interval of Hz and V circles

Optical scale interval

Estimation of interval

0.1 minute (')

1-11. SAFETY, CARE, AND HANDLING

a. Handle the Theodolite carefully. Never subject the unit to bumps, jars, or drops.

b. Return the theodolite and tribrach assembly to the metal carrying case whenever the theodolite and tribrach

assembly are to be left unattended for extended periods of time.

c. Never place a damp or wet theodolite and tribrach assembly in the metal carrying case.

d. Handle the metal carrying case with the theodolite and tribrach assembly carefully to avoid sudden jolts,

continued vibrations, or other shocks that might damage the delicate parts of the theodolite and tribrach assembly.

e. Do not drop the metal carrying case with the theodolite and tribrach assembly into a vehicle or on the ground.

Section III. TECHNICAL PRINCIPLES OF OPERATION

Figure 1-2 shows the light ray paths through the theodolite.

1-12

Change 1

Index