e-survey ET2A, Руководство пользователя

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SHANGHAI ESURVEY GNSS CO., LTD.
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6. Turn the eyepiece end until the vertical line of the reticle overlaps with point A:
7. Tighten the four screws fixing the eyepiece.
8. Repeat calibration until point A always moves along the vertical line of the reticle.
After doing correction for the vertical line of the telescope reticle, check the collimation error and
index error of the instrument.
8.4 Check and Adjust the Line-of-Sight Error or Collimation Error
The line-of-sight error or collimation error (C) is the deviation from the perpendicular between the
tilting axis and the line of sight, and it affects the horizontal angle readings and increases with
steep sightings. When the error is greater than 8'', adjustment of the collimation error is required.
These errors should be determined before the instrument is used for the first time, before precision
surveys, after long periods of transport, before and after long periods of work, and if the
temperature changes by more than 10°C (18°F).
To adjust the line-of-sight or collimation error, do the following:
1. Set the instrument on a tripod and precisely level it.