The Measurement Of Horizontal Angle - ADA INSTRUMENTS Ruber-X32 Operating Manual

RUBER-X32
2) Elevation between A and B points is computed as the sum of elevations of all sections.
General formula is following:
Height of determinated point=
Height of giving point+
Sum of back staff readings-
Sum of front staff readings.
Note: This simple method doesn't allow to determine errors. It's better to take measurements from A point to B point
and back to A point. In this case it is possible to compute locking error.

6.2. THE MEASUREMENT OF HORIZONTAL ANGLE

Horizontal circle digitizing is made clockwise in every 10˚ (360˚).
Scale minimun value of limb 1º.
1) Use the plumb for accurate setting of the instrument over the point.
2) Point at A point and rotate the limb (8) till the overlapping of index with 0˚ (Pic.15).
3) Point at B point and take reading.
Example: 30˚ (Pic.16)
Pic.15 Pic.16
1
MEASUREMENT FOUNDATION