2 Setting up the Instrument
30 Spectra Precision Focus 6 5" Total Station User Guide
6. Look through the optical plummet to make sure that the image of the station
point is still in the center of the reticle mark.
7. If the station point is off-center, do one of the following:
– If the station point is slightly off-center, loosen the tripod mounting screw
and then center the instrument on the tripod. Use only direct movement to
center the instrument. Do not rotate it.
When the instrument is centered, tighten the mounting screw.
– If there is major displacement of the station point, repeat this procedure
starting with Step 2.
Centering with the laser plummet
C
CAUTION – Do not look at the laser directly.
Note – For high accuracy, check and adjust the laser plummet before you center the
instrument.
1. Set up the instrument on the tripod. See page 29.
2. Turn on the laser plummet.
3. Align the laser pointer to the station point. To do this, turn the leveling screws
until the laser pointer is over the station point.
4. While supporting the tripod head with one hand, loosen the tripod leg clamps
and adjust the lengths or the legs until the air bubble is the center of the circular
level.
5. Tighten the tripod leg clamps.
6. Use the electronic level to level the instrument. See Leveling the instrument,
page 31.
7. Check that the laser pointer is over the station point.
8. If the station point is off-center, do one of the following:
– If the station point is slightly off-center, loosen the tripod mounting screw
and then center the instrument on the tripod. Use only direct movement to
center the instrument. Do not rotate it.
When the instrument is centered, tighten the mounting screw.
– If there is major displacement of the station point, repeat this procedure
starting with Step 2.
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