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3. Set the instrument on Point B and center it accurately, measure the Horizontal
Distance of BC accurately.
4. Then the Instrument Constant can be obtained:
K=AC-(AB+BC)
K should be near to 0, If ｜K｜>5mm, the instrument should be strictly inspected
in the standard baseline site, and adjusted according to the inspection value.
Adjust
If a strict inspection proves that the Instrument Constant K has changed and is
not close to 0. If the operator wants to adjust, should set Stadia Constant
according to the Constant K
●Set the orientation via the Vertical Hair to maintain Point A, B, C on the same
line precisely. There must be a fixed and clear centering mark on the ground of
Point B
●Whether the prism center of Point B coincides with the Instrument Center is a
significant step to inspect the accuracy. So on Point B the tripod or compatible
tribrach should be used. It will decrease the difference.
Turn to 2
nd
page of Adjustment.
Press F1 to set the Instrument Constant.
Input the instrument constant.
Press SAVE to save the change.
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