e-survey ET2A - Check and Adjustment; Check and Adjust the Plate Level

SHANGHAI ESURVEY GNSS CO., LTD.
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8 Check and Adjustment
8.1 Check and Adjust the Plate Level
To check and adjust the plate level, do the following:
1. Level the plate level for precise leveling of the instrument.
2. Rotate the instrument 180° (200 gon), and observe if the bubble moves from the center:
o If it does, proceed to step 3 - 5.
o If not, no adjustment is required
3. Adjust the foot screw that is parallel to the plate level, and move the bubble half of the shift
to the center of the plate level:
4. To move the bubble the remaining half distance towards the center of the plate level, adjust
the adjusting screw of the plate level with the adjustment pin.
5. Repeat step 3 - 5 until the bubble can remain at the center of the plate level when the plate
level rotates to any position.