先将经纬仪安置好,进行对中,整平,并在
A
,
B
两点树立标杆或测钎作为照准标志,
然后即可进行测角一测回的操作程序如下. :
( 1)
盘左位置,照准左边目标
A
,对水平度盘置数,略大于
°,将读数
to
左记入
手簿;
( 2)
顺时针方向旋转照准部,照准右边目标
B
,读取水平度盘读数
b
由此算得上半测回的角值:
β
左=
b
左
- to
左
( 3)
盘右位置,先照准右边目标
B
,读取水平度盘读数
b
右,记入手簿;
( 4)
逆时针方向转动照准部,照准左边目标A
,读取水平度盘读数
to
由此算得下半测回的角值:
β
右=
b
右
- to
右.
对于
DJ6
经纬仪,上,下两个半测回所测的水平角之差不应超过±36
" .
如需要观测多个测回,则各测回起始方向的置数应按180
°
/ n
递增.但应注意,不
论观测多少个测回,第一测回的置数均应当为
°.各测回观测角值互差不应超过±
24
" .Theodolite placed first good conduct alignment, leveling and
A
,
B
Establish a benchmark measure two or brazing as sighting marks,
You can then carry out a test back angle measurement procedure is as follows :
( 1 )
Face position , sighting the left goal
A
, Set the number on the horizontal circle , slightly larger than the
°, the reading
to
Left credited
Hand-book ;
( 2 )
Alidade clockwise , the right of the target sighting
Read horizontal circle reading
b
Left , remember to start book.
Thus be regarded as the first half of the measured angle value back : β
Left =
b
Left
- To
Left
( 3 )
Plate right position , the right of first sighting target
B
Read horizontal circle reading
b
Right, remember to start book ;
( 4 )
Counterclockwise rotating alidade , sighting the left goal
Read horizontal circle reading
to
Right, remember to start book.
Thus be regarded as the second half of the measured angle value back :
β
Right =
b
Right
- To
Right .
For
DJ6
Theodolite, on the next two and a half rounds of the measured horizontal angle difference shall not exceed ±
36
. "
If you need more than one observation rounds , then back to the initial direction of the measuring device shall be the number of
180
/ N
Increments. Note, however, not
On observing the number of rounds, the number of the first set of measurements shall return to 0
°. Various rounds observations angular difference between each value should not exceed ±24。