TM5-6675-296-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE:
THEODOLITE MODEL
T2 - 68MIL SHOWN,
ADJUST ALL MODELS
IN A SIMILAR MANNER.
STEP 1.
SIGHT A WELL DEFINED OBJECT WITH THE VERTICAL CROSSLINE. MAKE THE COINCIDENCE
OF GRADUATION LINES AND RECORD THE SCALE READINGS.
REVERSE THE TELESCOPE POSITION AND SIGHT THE OBJECT. MAKE THE COINCIDENCE OF
STEP 2.
THE GRADUATION LINES AND RECORD THE SCALE READINGS.
THE DIFFERENCE BETWEEN THE TWO READINGS, REDUCED BY 3,200 MILS IS TWICE THE
STEP 3.
COLLIMATION ERROR.
STEP 4.
SET THE MICROMETER SCALE AT ONE-HALF THE FIGURE COMPUTED BY STEP 3. MAKE THE
COINCIDENCE OF THE GRADUATION LINES BY TURNING THE HORIZONTAL SLOW-MOTION SCREW.
WITH THE TELESCOPE IN THIS POSITION, CENTER THE VERTICAL CROSSLINE ON THE OBJECT
STEP 6.
AS FOLLOWS:
A.
SLIGHTLY LOOSEN THE TWO CLAMP SCREWS .
B. TO MOVE THE CROSSLINE TO THE RIGHT, LOOSEN LEFT ADJUSTING SCREW AND TIGHTEN
RIGHT ADJUSTING SCREW BY AN EQUAL DEGREE.
C. TO MOVE CROSSLINE TO THE LEFT, LOOSEN RIGHT ADJUSTING SCREW AND TiGHTEN LEFT
ADJUSTING SCREW BY AN EQUAL DEGREE.
D.
TIGHTEN THE TWO CLAMP SCREWS.
TS 6675-29614/3-4
Figure 3-4. Horizontal collimation error, adjustment.
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