GPI GPI-ZL21R, Инструкция по эксплуатации, Страница: 11 / 18

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(2) Leveling precisely with plate level
Loosen horizontal clamp screw, place the
plate level in parallel with a line joining
leveling screws A and B. Adjust the
leveling screw, position the bubble in the
center of plate level
（
Fig.6
）
.
Rotate the instrument 90
∘
around the
vertical axis. Adjust the leveling screw C,
position the bubble in the center of plate
level.
（
Fig.7
）
. Repeat above steps until the
bubble remains in the center of plate level
while the instrument is rotated to any
position.
Screw A Screw B
Screw C
Fig. 7
Screw A Screw B
Screw C
Bubble
Plate level
Fig. 6