2
Preparation
26
Field Station NPL-632 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
Содержание NPL-632
Страница 1: ...Version A1 1 0 May 2006 Field Station NPL 632 Instruction Manual ...
Страница 8: ...Contents viii Field Station NPL 632 Instruction Manual ...
Страница 14: ...Safety 16 Field Station NPL 632 Instruction Manual ...
Страница 110: ...4 Applications 96 Field Station NPL 632 Instruction Manual ...
Страница 168: ...6 Checking and Adjustment 154 Field Station NPL 632 Instruction Manual ...
Страница 177: ...C H A P T E R 8 Field Station NPL 632 Instruction Manual 163 System Diagrams 8 In this chapter Q System Components ...
Страница 180: ...8 System Diagrams 166 Field Station NPL 632 Instruction Manual ...
Страница 196: ...9 Communications 182 Field Station NPL 632 Instruction Manual ...
Страница 206: ...10 Error Messages 192 Field Station NPL 632 Instruction Manual ...