The following observations are observed during testing a levelling instrument.
|
Instrument at Station |
Staff reading at station |
|
|
A |
B |
|
|
A |
1.626 |
2.428 |
|
B |
0.724 |
1.434 |
The distance between station A and B is 1500 m: Reduce level of station A is 123.83 m
1
True Reduce level of station B is 123.074 m
2
Error due to curvature is 0.1766 m
3
Collimation error is -0.105 m
4
Total error is - 0.756 m.