16
2. Move the bubble to the center of the circle by
turning
screw C.
(2) Accurate Levelling-Up with plate level
1. Loosen the horizontal motion clamp, and turn
the instrument till the plate level is parallel to a
line shaped with screws A and B. Adjust the
screws A and B to make the bubble in the center
of the level.
2. Loosen the horizontal motion clamp, and turn
the
instrument approximately 90°.Adjust the screw
C until the bubble in the center of the level.
3. Repeat above steps until the bubble remains in
the center of the plate level while the instrument
is rotated to any position.
(3) Accurate Levelling-Up with Electronic Level on the screen
It is convenient for W-1502N series to level-up with electronic level,
especially when it is difficult to observe the circular level and plate level.
Firstly,press the key 【★】 to turn on
the electronic bubble as shown in left
figure.On the electronic bubble
screen,five function keys are displayed
in the left column,which is listed as
follows:
Screw A
Screw C
Screw
Screw
Screw
Plate
Screw C
Screw A
Screw
Screw
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