TM-9-2350-256-10

TM-9-2350-256-10 - Page 365 of 796

SURVEYING LEVEL OPERATION

INITIAL SETUP:

Tools and Special Tools

Surveying level (WP 0132, Table 2, Item 40)

References

FM 4-30.31 (WP 0131)

DESCRIPTION OF SURVEYING LEVEL

The surveying level is an instrument used for measuring slopes. Use Figure 1 as a guide to perform surveying

procedure. The instrument consists of a square metal sighting tube (Figure 1, Item 6) on which an arc

(Figure 1, Item 5) is mounted with an index arm (Figure 1, Item 4) holding a level vial (Figure 1, Item 3). Inside

sighting tube, right of the arc, is a mirror which reflects the image of a center level bubble (Figure 1, Item 7) on

level vial to eye piece (Figure 1, Item 9). A cross line (Figure 1, Item 8) is mounted horizontally inside sighting

tube and is used to align on the target. The leveling vial is mounted on the index arm so that it can be rotated. The

amount of rotation can be read on scale (Figure 1, Item 1) of the arc on index arm. Setting knob

(Figure 1, Item 10) provides slow motion adjustment of index arm. The index arm thumb nut (Figure 1, Item 2) can

be tightened to lock the index arm.

Figure 1.

Surveying Level Description.

END OF TASK

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