Spectra Precision Survey Pro v5.4 - Manual (Page 84)

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Adjusting a Closed Loop
Adjustment may be used to remove the error computed from any existing
closed loop. This is a simple arithmetic adjustment where the computed error
can be either distributed equally among each instrument setup in the loop, or
a weighted adjustment can be applied where the error is distributed based on
the length of the backsight and foresight distance of each turn.
1. From the main menu, tap
Survey > Adjustment
2. Choose how you want Survey Pro to distribute errors. Weigh by # of Setups
divides the computed error equally among each instrument setup selected
in the loop.
Weigh by length of Setups distributes the error where each
instrument setup is adjusted by an error proportional to the length between
them, so that instrument setups that are farther apart will carry a larger
portion of the error adjustment than those closer together.
3. Choose the portion of the loop you want to adjust. Adjust Loop from Begin to
End will include every instrument setup of the selected level loop in the
error adjustment.
Adjust Loop From a Specific Point to End will only adjust the
turning points and benchmarks starting from an alternative benchmark
(that you need to specify in the
Begin CBM Pt field) to the end of the loop.
4. Use the Closed Loop Name drop-down list to select the name of the loop you
want to adjust. Only closed loops are listed here.
5. Tap Next to access the Adjustment Preview screen.
6. Tap Adjust to start the adjustment. At the end of this process, a message
will inform you that the job file has been backed up and this backup file
includes the archive of the adjustment.
7. Tap OK to close the message and read the results of the adjustment.
8. Tap to close the results screen.