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To set the Total Station at a point, temporary adjustments have to be made. The temporary adjustments to be made periodically are:
- a)Centering and Leveling
- b)Fixing and Leveling
- c)Leveling and Sighting
- d)Centering and Sighting
Correct answer is option 'A'. Can you explain this answer?
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To set the Total Station at a point, temporary adjustments have to be ...
Temporary Adjustments for Setting the Total Station at a Point
Introduction
When using a total station for surveying or measurement purposes, it is essential to set it up accurately at the desired point. This involves making temporary adjustments to ensure proper centering and leveling of the instrument. The temporary adjustments to be made periodically are centering and leveling.
Centering
Centering refers to the process of placing the total station over the desired point accurately. It involves aligning the instrument's optical axis with the point to be surveyed. The following steps are typically involved in centering:
1. Marking the Point: First, the desired point is marked on the ground or any suitable reference surface using stakes or other markers.
2. Rough Placement: The total station is roughly placed near the marked point, ensuring it is not too far away. This step helps in making the subsequent adjustments easier and quicker.
3. Fine Placement: The instrument is then carefully moved to the exact point by visually aligning it with the mark. This can be done by sighting along the instrument's optical axis or using a plumb bob.
4. Centering Screws: Once the instrument is approximately centered, the centering screws are adjusted to precisely position the instrument over the marked point. These screws allow for horizontal and vertical adjustments to align the instrument accurately.
Leveling
Leveling is the process of ensuring that the total station is precisely horizontal, both in the vertical and horizontal planes. This step is crucial for accurate measurements. The following steps are involved in leveling:
1. Initial Rough Leveling: The instrument is initially leveled roughly by adjusting the leveling screws. This ensures that the instrument is approximately horizontal.
2. Optical Leveling: The built-in optical level of the total station is then used to fine-tune the leveling. The leveling bubble or vial is observed, and the leveling screws are adjusted until the bubble is centrally positioned. This ensures the instrument is accurately leveled.
3. Final Verification: After the initial leveling, the instrument's leveling is rechecked by reversing the telescope 180 degrees. If the bubble remains centered, it indicates that the instrument is correctly leveled.
Conclusion
To set the total station at a point accurately, temporary adjustments must be made. These adjustments involve centering the instrument over the desired point and ensuring its horizontal leveling. By following the steps mentioned above, surveyors can ensure that the total station is correctly set up for precise measurements and data collection.
Introduction
When using a total station for surveying or measurement purposes, it is essential to set it up accurately at the desired point. This involves making temporary adjustments to ensure proper centering and leveling of the instrument. The temporary adjustments to be made periodically are centering and leveling.
Centering
Centering refers to the process of placing the total station over the desired point accurately. It involves aligning the instrument's optical axis with the point to be surveyed. The following steps are typically involved in centering:
1. Marking the Point: First, the desired point is marked on the ground or any suitable reference surface using stakes or other markers.
2. Rough Placement: The total station is roughly placed near the marked point, ensuring it is not too far away. This step helps in making the subsequent adjustments easier and quicker.
3. Fine Placement: The instrument is then carefully moved to the exact point by visually aligning it with the mark. This can be done by sighting along the instrument's optical axis or using a plumb bob.
4. Centering Screws: Once the instrument is approximately centered, the centering screws are adjusted to precisely position the instrument over the marked point. These screws allow for horizontal and vertical adjustments to align the instrument accurately.
Leveling
Leveling is the process of ensuring that the total station is precisely horizontal, both in the vertical and horizontal planes. This step is crucial for accurate measurements. The following steps are involved in leveling:
1. Initial Rough Leveling: The instrument is initially leveled roughly by adjusting the leveling screws. This ensures that the instrument is approximately horizontal.
2. Optical Leveling: The built-in optical level of the total station is then used to fine-tune the leveling. The leveling bubble or vial is observed, and the leveling screws are adjusted until the bubble is centrally positioned. This ensures the instrument is accurately leveled.
3. Final Verification: After the initial leveling, the instrument's leveling is rechecked by reversing the telescope 180 degrees. If the bubble remains centered, it indicates that the instrument is correctly leveled.
Conclusion
To set the total station at a point accurately, temporary adjustments must be made. These adjustments involve centering the instrument over the desired point and ensuring its horizontal leveling. By following the steps mentioned above, surveyors can ensure that the total station is correctly set up for precise measurements and data collection.
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To set the Total Station at a point, temporary adjustments have to be ...
Temporary Adjustments of Total station
Adjustments which required to be made at every instrument station before making any observation. It can be done by following three procedures,
Adjustments which required to be made at every instrument station before making any observation. It can be done by following three procedures,
- Centering the Total station over the station.
- Levelling the Total station.
- Elimination of parallax.
Centering the Total station over the station
- This includes the Centering of the Total station over the ground mark and also approximate levelling with the help of Tripod legs.
- While centering, it is necessary to ensure the approximate levelness; otherwise, the centering will be disturbed when subsequent Levelling of the instrument is done. It can be done either using a plumb-bob or laser plummet.
Levelling the Total station
Accurate Levelling is done with the help of plate levels using levelling screws. Here the Vertical axis (plumb line)of the Total station is made truly vertical.
Accurate Levelling is done with the help of plate levels using levelling screws. Here the Vertical axis (plumb line)of the Total station is made truly vertical.
- Align the bubble parallel to two-foot screws and bring it to the center by turning both screws same direction.
- Align the bubble with the remaining foot screw (turn 90°) and bring it to the center by rotating it
- Repeat the process till the bubble remain centered in any direction. Principle of reversibility.
Elimination of parallax
- It is done by focusing the eyepiece for the distinct vision of crosshairs and focusing on the object to bring the image of the object in the plane of crosshairs. Accurate bisection and sighting are difficult when there is Parallax.
- Hold a white paper in front of the objective or sight the telescope towards the sky. Move the eyepiece in or out till the crosshairs are seen as sharp and distinct.
- Can be checked by moving the eye slowly to one side. If there is no parallax the image and the crosshairs will appears still.
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To set the Total Station at a point, temporary adjustments have to be made. The temporary adjustments to be made periodically are:a)Centering and Levelingb)Fixing and Levelingc)Leveling and Sightingd)Centering and SightingCorrect answer is option 'A'. Can you explain this answer?
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