Sokkia B20, Operator'S Manual, Page: 51 / 60

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8.2 AUTOMATIC COMPENSATOR
1) Center the bubble in the circular level .
2) While turning the nearest leveling screw to the sighting
axis 1/8 of a turn to the right or left, check the movement of
the horizontal cross-line.
(Another method is to tap the tripod legs or the main body
while sighting a clear target.)
Fig.8.4
If the automatic compensator mechanism is working
normally the cross-line should bounce, then immedi-
ately return to the original position.
It is advisable to check the movement of the auto-
matic compensator before use.
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