Guidelines For Taking A Measurement - Leica LS10 User Manual

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5.3
Measurement
Values
Principle of
Electronic Height
Readings
Electronic Height
Reading with LS10
Instrument
LS10/LS15, Measurement Guidelines

Guidelines for Taking a Measurement

1
STN
D
D
B
F
B
H
H
0
Col
H = 0.0000 m
007895_001
STN
Station
1
Staff 1 (backsight staff)
2
Staff 2 (foresight staff)
C
/C
Staff C
and C
1
2
1
B
Staff height backsight. For double observations: B1, B2
F
Staff height foresight. For double observations: F1, F2
INT
Staff height intermediate sight or set-out sight
D
Backsight distance
B
D
Foresight distance
F
D
Intermediate sight distance / Set-out distance
Int
H
Height of starting point, for example, as height above sea level
0
H
Height of foresight point / intermediate point
dH
Height difference between backsight and foresight / intermediate sight / set-
out sight
d
Sequential height difference between two measurements taken in sequence
h
(foresight / intermediate sight / set-out sight)
H
Instrument horizon (height of line of sight)
Col
The bar code of the staff is stored in the instrument as a reference signal. When meas-
uring, the line decoder captures the visible section of the staff within the field of view
as a measuring signal. The instrument compares the measuring signal to the reference
signal and as a result displays the height of the staff and the horizontal distance.
The sensitivity of the sensor ranges from the highest frequencies of visible light down
to the frequency of infrared light.
Step
Description
007890_001
1.
Set up the instrument, level it and focus the reticle.
2.
Set up staff vertically with the bar code turned toward the instrument.
3.
Coarsely aim at staff.
4.
Focus with focussing drive.
C1
2
D
D
INT
INT
Z
F
dH
d
H
for intermediate or set-out sight
2
C2
INT
h
H
30

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