14
Operation
Sprinter 150/150M/250M - 1.0.0en
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6.6 BFFB Line Levelling Measurement*
)
Mean (average) of height difference in double-
sighting of backsight and foresight for BFFB line
levelling method.
6.7 Timer Measurement*
Set measurement time interval 00 hr:00 min in
Menu\Settings\Timer. Press and hold measuring key for 3 seconds
to start timer measurement, Timer icon will be shown at the top left
of LCD display to indicate current measurement mode. To stop
timer measurement, press and hold measuring key for 3 seconds.
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.
10.
System displays current 'Change Point'
measurement report. Press ENTER key
to accept the result.
11.
System refreshes a standby display for
measurement to the backsight of next
change point.
Step Key/Screen Description
dH