20
③
Repeat
the
steps
①②
for
each
90º
(100g)
rotation
of
the
instrument
and
check
whether
the
bubble
is
correctly
centered
in
all
directions.
2
Centering
by
using
the
optical
plummet
1)
Set
tripod
Set
up
tripod
to
suitable
height,
ensure
equal
length
of
three
legs,
spread
and
make
tripod
head
parallel
to
the
ground,
and
place
it
right
above
the
measurement
station
point.
Prop
up
tripod
on
the
ground
and
fix
one
leg.
2)
Install
instrument
and
collimate
the
point
Set
instrument
carefully
on
tripod,
tighten
the
central
connecting
screw
and
adjust
optical
plummet
to
make
the
reticle
distinctly.
Hold
the
other
two
unfixed
legs
with
both
hands
and
adjust
position
of
these
two
legs
through
observation
of
optical
plummet.
As
it
approximately
aims
at
the
station
point,
make
all
three
legs
fixed
on
the
ground.
Adjust
three
leg
screws
of
the
instrument
to
make
optical
plummet
collimate
precisely
to
the
station
point.
3)
Use
circular
vial
to
roughly
level
the
instrument.
Adjust
length
of
three
legs
of
tripod;
make
the
circular
vial
bubble
of
the
instrument
in
the
middle.
4)
Use
plate
vial
to
level
the
instrument
accurately.
Rotate
the
instrument
horizontally
by
loosening
the
Horizontal
Clamp
Screw
①
and
place
the
plate
vial
parallel
to
the
line
connecting
leveling
screw
A
and
B,
and
then
bring
the
bubble
to
the
center
of
the
plate
vial
by
turning
the
leveling
screws
A
and
B.
②
Rotate
the
instrument
90 ,
make
it
perpendicular
to
the
connecting
line
of
℃
level
screws
A
and
B.
Turn
level
screw
C
to
make
the
bubble
of
the
plate
vial
in
the
middle.
5)
Precisely
centering
and
leveling
Through
observation
of
optical
plummet,
slightly
loosen
the
central
connecting
screw
and
move
the
instrument
evenly
(Don’t
rotate
the
instrument),
making
the
instrument
precisely
collimating
to
the
station
point.
Then
tighten
the
central
connecting
screw
and
level
the
instrument
precisely
again.
Содержание NTS-960R
Страница 1: ......
Страница 2: ...Operation Manual NTS 960R Series Electronic Total Station SOUTH SURVEYING MAPPING INSTRUMENT CO LTD...
Страница 11: ...4 1 NOMENCLATURE AND FUNCTIONS 1 1 NOMENCLATURE...
Страница 12: ...5...
Страница 214: ......
