General 24x Instruction Manual page 10

COMPENSATOR
▪ Place the instrument onto a solid tripod
between two staves spaced 30m to 50m
apart.
▪ Level off the optical using the bubble vial.
▪ Take an accurate measurement reading
from staff A. (Example. 1.924m). Take an
accurate measurement reading from staff B
(Example. 1.712m)
▪ Subtract the measurement of staff B
from staff A. (Example. 1.924m – 1.712m =
0.212m). This calculation shows that staff B
is 0.212m higher than staff A.
▪ Position the instrument and tripod 1m from
Staff A while keeping it in between both Staff
A and Staff B.
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▪ Take an accurate measurement reading
from Staff A. (Example. 1.696m. Subtract the
height difference that was calculated in step
3 from the current measurement reading
(Example. 1.696m – 0.212m = 1.484m).
▪ Take an accurate measurement reading
from staff B. The measurement reading for
staff B should be approximately 1.484m
based on the calculation above.
▪ If the compensator accuracy is less
or greater than 3mm after following the
measurements and calculations shown in
these steps, a service and calibration is
required.