SHANGHAI ESURVEY GNSS CO., LTD.
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3.3.2.1 Do Accurate Levelling-up with the Tubular Level
To do accurate levelling-up with the tubular level, do the following:
1. Loosen the horizontal motion clamp, turn the instrument till the tubular level is
parallel to a line shaped with screws A and B, and adjust the screws A and B to
make the bubble in the center of the level.
2. Loosen the horizontal motion clamp, turn the instrument approximately 90°, and
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 tubular level while
the instrument is rotated to any position.
3.3.2.2 Do Accurate Levelling-up with the Electronic Level on the Screen
It is convenient for RTS330 series to level-up with electronic level, especially when it is
difficult to observe the circular level and tubular level.
To do accurate levelling-up with the electronic level on the screen, do the following:
1. Power on the instrument.
2. To enter LEVEL/PLUMMET display, press Fn, and press F1 / 1.
3. Optional: To turn on/off the X/Y compensator by pressing ◀ / ▶.
4. Do accurate levelling-up by turning three foot screws, and make sure the bubble is
in the tubular level and the black spot is in the center on the screen.
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