2
Preparation
18
Total Station DTM-322 Instruction Manual
Face-1/Face-2 Measurements
You can take a measurement from either face of the instrument. To change the face,
rotate the instrument 180° on its base, and rotate the telescope 180° within the
standard.
By averaging the Face-1 and Face-2 measurement values, you can cancel out most
constant mechanical errors. Some errors, such as vertical axis error, cannot be
cancelled out by averaging Face-1 and Face-2 measurements.
C
CAUTION – When rotating the telescope, take care not to catch your finger in the gap between
the instrument’s standard and the telescope.
A Face-1 measurement is made with the vertical circle positioned to the left of the
telescope eyepiece. A Face-2 measurement is made with the vertical circle positioned
to the right of the telescope eyepiece.
Face-1
Face-2
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