Checks And Adjustments; Plate Level - Sokkia 30R Series Operator's Manual

26. CHECKS AND ADJUSTMENTS

A SET is a precision instrument that requires fine adjustments. It must be
inspected and adjusted before use so that it always performs accurate
measurements.
• Always perform checking and adjustment in the proper sequence beginning
from "26.1 Plate Level" to "26.8 Guide Light".
• In addition, the instrument should be inspected with special care after it has
been stored a long time, transported, or when it may have been damaged by a
strong shock.
26.1

Plate Level

The bubble tube is made of glass, so it is sensitive to temperature changes or to
shock. Check and adjust it as outlined below.
PROCEDURE Checking and adjusting
1. Level the instrument and check
the position of the bubble of the
plate level.
"7.2 Levelling", steps 3 to 5.
2. Turn the upper part through 180°
and check the bubble position.
If the bubble is still centered, no
adjustment is necessary.
If the bubble is off-center, adjust as
follows.
3. Correct half of the bubble
displacement using levelling foot
screw C.
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