Temporary Adjustment of SURVEYING Instrument in Field
- The adjustments to be made at every setting of the instrument are called temporary adjustments.
- Following are the five temporary adjustments are required:
- 1. Setting up: Tripod stand is set on the ground firmly so that its top is at a convenient height.
- 2. Centering: It is done to place the vertical axis exactly over the station mark
- 3. Levelling: The levelling is done to make the vertical axis of the instrument truly vertical or to make horizontal plate truly horizontal
- 4. Focusing the eye piece: The eye piece is focused to make the cross hairs distinct and clear
- 5. Focusing the objective: This is done to bring the image of the object in plane of the cross hairs
Other Important Topic Related to Surveying in Civil engineering