Spectra Precision Layout Pro Field Software Quick Start Guide - Manual (Page 32)

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Setting the Elevation of the Instrument Location (with
instrument located either on or off the line): When
selecting the
Reference Line method in the Instrument
Setup menu, you are first prompted to measure
elevation. If you choose “No”, the procedure will be as
described above and all measured points will be 2D
points, including the instrument point and the marked
points.
If you choose “Yes”, you will additionally need to enter
the instrument height before going any further ([9]),
and then the rod height when you specify the
instrument location (on or off the line) ([10]).
Just before completing the instrument setup, you will
be able to set the elevation of the instrument location
to be that of a nearby benchmark point. To do this, tap
on the
Use BM Elev button ([11]), enter the known
elevation for the benchmark point ([12]), then place a
prism on the benchmark and shoot that point from the
instrument location ([13]).
Layout Pro will calculate and display the elevation for
the instrument location ([14]). You will confirm this
elevation by tapping
Finish twice.
[9] [10]
[11] [12]
[13] [14]