Horizontal Angle Measurement - Sokkia SDM3E Operation Manual

(2) Horizontal angle measurement
I) CoventionaI (clockwise) measurement
a. Sight the first target A. (Fig. 16)
b. Turn the micrometer knob ~ to read the hori-
zontal circle.
Example: 44°21'40" (Fig.
17)
A
EB
o Fig. 16
B
v
-
H .~i
--
Fig.
17
c. Use the horizontal clamp Cf and horizontal fine
motion CD to sight the second target B. (Fig. 18)
d. Turn the micrometer knob and read the horizontal
circle. Example: 125°42' 40" (Fig. 19)
e. Subtract the 1st from the 2nd reading to obtain the
angle AOB.
Example: 125°42'40" - 44°21' 40" = 81°21'00"
A
æ
o Fig. 18
B
.,..-
H ==
.,-
Fig.
19
25