Bffb Line Levelling Measurement - GeoMax ZDL700 Serie Manual Del Usuario

6.5 BFFB Line Levelling Measurement

Step Key/Screen Description
1.
Initialize the BFFB method.
2.
Initiate measurement to Benchmark.
3. Backsight measurement displayed.
4. Measurement to foresight.
5.
Foresight measurement displayed.
6. Measure to the foresight staff (second
sighting).
7.
Foresight (second sighting) measure-
ment displayed.
8. Measure to the backsight staff (second
sighting).
9.
Backsight (second sighting) measure-
ment displayed.
Step Key/Screen
10.
11.
Operation
Description
System displays current 'Change Point'
measurement report. Press ENTER key
to accept the result.
System refreshes a standby display for
measurement to the backsight of next
change point.
Mean (average) of height difference in double-
sighting of backsight and foresight for BFFB
line levelling method.
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