Ada PROF-X6 А00160 Инструкция по эксплуатации онлайн [27/36] 5021

Ada PROF-X6 А00160 Инструкция по эксплуатации онлайн [27/36] 5021
27

PROF Levelling with the tubular level Turn the alidade of theodolite first in order to make the tubular level parallel to the line connecting the centers of any two foot screws Fig 5A and at the same time turn the two foot screws to enable the bubble to position itself in the middle of the tubular level Then turn the alidade 90 Fig 5B and also turn the third foot screw to make the bubble move to the middle of the level Repeat the above described procedure several times so that the offset of the bubble doesn t exceed the allowance for whatever position the alidade is turned Fig 5A Fig 5B 4 Mounting the instrument properly over the measuring point Use an optical plummet to enable the center of the vertical axis of the theodolite to be directly over the plummet line of measuring point When the optical plummet is used pull out its visual lens and turn it so that the measuring point is distinctly imaged on the graduated plate If the center of the measuring point is not in the center of the graduated plate loosen the central screw of the tripod Then tighten the central screw of the tripod and check the levelling of the instrument Turn the alidade 180 and repeat the above described procedure 5 Illumination Turning the position of the light reflection mirror 11 properly will result in a bright illumination of the graduated circle 27 MEASUREMENT FOUNDATION

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