How do you adjust the the dumpy level?

First take the dumpy level to the place of surveying and place the tripod on the ground. Make sure that the three points of the tripod is placed such that the observer can take readings quite easily. Then take the dumpy level and place it on tripod and fix the center nut and make sure that the dumpy level doesn't shake.

Then check the bubble level in the dumpy level and use adjust the main level screw so that at least 2/3 of the bubble is inside the circular area of the bubble level. Then adjust it by the other two screws and rotate the dumpy level 90 degrees and check whether the bubble shows a leveled stage.

If it shows that the bubble is centered then it is O.K the dumpy level is leveled.....

Then in order to take a reading, the u bubble should have to be leveled adjust the screw in the right side(there are a few adjusting screws,please get to know the actions performed by the screws, for that we must handle the instrument for sometime) and make sure the 'U' shape is formed. Now the instrument is ready take readings.....