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NA720/724/728/730/730 plus, Operation
The required accuracy is usually not very high with such measurements.
Nevertheless, from time to time read the staff on a stable intermediate point
(reading must remain the same).
Procedure:
Step Description
1.
Set up instrument centrally between the desired points. The instrument tele-
scope may not be below the highest measured intermediate point.
2.
Set up staff vertically at reference point A.
3.
Aim on staff and read and take down height (=backsight to known point).
4.
Set up staff vertically at point 1.
5.
Aim on staff and read and take down height (=measuring intermediate point,
intermediate sight)
6.
Repeat steps 4 and 5 for additional intermediate points.
7.
The height of individual points are:
Height = Height of station point
+ backsight (A)
- intermediate sight
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