AccuLine 40-6910 Manual de instruções - Página 10

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Page 10

5.6 Measure the difference in elevation requiring more than

one set-up

If two points are either too far apart or at too great a difference of

elevation to be observed from one set-up, the procedure shown below

is recommended. This example assumes that you want to find the

difference in elevation between points A and D. To make the finding of

this difference simple, use the convenient terms plus (+) sight and

minus (-) sight and carry the readings at each set-up as shown.

The difference of elevation between D and A is found by taking the

difference between the sum of the plus sights and the sum of the

minus sights. If the sum of the plus sights is larger, the final point is

higher than the starting point. If the sum of the minus sights is larger,

the final point is lower than than the starting point.