Optical Plummet - Sokkia SDM3E Operation Manual

l
t
~-,i
~I
.:!
,
71
tt
..,
~i
~;
~:
w
~~
pl! 1,.
~~.
i~~
'.
(7)
J
~l'
ii'
:"1
l:
ï
3) Set the power switch ED ON and make sure the light
value lamp 0 lights up.
4) Four more readings are necessary.
Turn the horizontal or vertical fine motion slowly until
the light value lamp becomes dark. Then take readings.
Readings H t' Hr: when the telescope is directed to the
left (right) of the sighted direction
in 2) above.
Readings Za' Zb: when the telescope is directed above
(below) the sighted direction in 2)
above.
5) Check the differences of H l (Hr) against H, and Za (Zb)
against Z.
When the four differences are larger than 4', the coin-
cidence is normaL. If any difference is equal to or smaller
than 3', please contact our agent.
Optical plummet
I) . Level the SDM3E. Center a surveying point to the reticle
of the optical plummet. Loosen the horizontal clamp and
turn the upper part through 180°. When the surveying
point is stil centered, adjusting is not necessary.
2) If the surveying point is decentered, correct half the
deviation with the four adjusting screws fD , and correct
the remaining half with the leveling screws.
3) Repeat the adjustment if necessary.
Fig. 124
'\
83