Theodolite
Leveling
Step 1
Step 2
Step 3
Refer to Figure 38. Assemble 3 brass rod holders as shown. The brass rod holders used for calibration of the theodolite to the reflector and subsequent alignment of the reflector, must be installed in the third seam holes at the panel seams shown.
Before taking any readings, allow the theodolite to become acclimated to ambient condi- tions for at least 15 to 20 minutes prior to operation.
Notice proper installation orientation setting of tribrach assembly and the position of the tribrach leveling screws with relation to the brass rod holders. After installation of theodolite onto the torque tube assembly, it is necessary to level the theodolite to the reflector. This procedure is performed by adjusting the three leveling screws of the trib- ach assembly.
223718A
Figure 38
40 | Installation Procedures |