FOCUS 35 TOTAL STATION USER GUIDE
4 – Setup
75
Measuring the Instrument Height
There are two measurement marks on the side of the instrument. The top mark ❶ corresponds to
the trunnion axis of the instrument. The bottom mark
❷ is 0.158 m (0.518 ft) below the top mark.
Measure the bottom mark to the top ridge of the mark.
Instrument height marks:
When the Spectra Precision Survey Pro is running, the software has additional functions that reduce
the bottom mark measurement to the required vertical instrument height to the trunnion axis, see
image below and the following paragraph.
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