Figure 2-6. Theodolite leveling.

TM5-6675-296-14

UNLOCK THE HORIZONTAL CLAMP. ROTATE THE U-STANDARD UNTIL THE PLATE LEVEL IS

STEP 1.

PARALLEL TO A LINE JOINING ANY TWO LEVELING SCREWS. LOCK THE CLAMP.

TURN THE TWO LEVELING SCREWS THAT ARE PARALLEL WITH THE PLATE LEVEL

STEP 2.

SIMULTANEOUSLY, BUT IN OPPOSITE DIRECTIONS UNTIL THE LEVEL BUBBLE IS CENTERED.

UNLOCK THE HORIZONTAL CLAMP. ROTATE THE U-STANDARD 90 AND LOCK THE CLAMP.

STEP 3.

TURN THE THIRD LEVELING SCREW UNTIL THE LEVEL BUBBLE CENTERED.

UNLOCK THE HORIZONTAL CLAMP. ROTATE THE U-STANDARD 180 AND LOCK THE CLAMP.

STEP 4.

TUR.N THE SAME LEVELING SCREW AS IN STEP 3 AND REMOVE ONE-HALF OF ANY BUBBLE

.. .

DISPLACEMENT THAT MAY EXIST.

IF AFTER STEP 4 THE PLATE LEVEL BUBBLE IS MORE THAN TWO DIVISIONS FROM

NOTE:

CENTRALITY, THE CORRECTION IS MADE WITH THE PLATE LEVEL ADJUSTING SCREW.

TS 6675-296-14/2-6

Figure 2-6. Theodolite leveling.