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Manufacturer’s Recommendation for Setting up a Theodolite

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Manufacturer’s Recommendation for Setting up a Theodolite. 1) Ensure that :-. the tripod head is approximately level. the tripod feet are firmly fixed in the ground. This should be done BEFORE removing the theodolite from its box.

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Presentation Transcript
slide1

Manufacturer’s Recommendation for Setting up a Theodolite

1) Ensure that :-

  • the tripod head is approximately level
  • the tripod feet are firmly fixed in the ground
  • This should be done BEFORE removing the theodolite from its box.

2) Place the theodolite on top of the tripod, and tighten the centring screw to

clamp the theodolite centrally on the tripod head.

3) Use the optical plummet to focus onto the survey station (e.g. nail in top of peg)

  • Turn the optical plummet eyepiece to focus the reticle (i.e. the black
  • circular mark)
  • push (or pull) the optical plummet focussing ring to focus on the
  • survey station
slide2

Optical

Plummet

Rotate to

focus

reticle

Pull in / out

to focus on the ground (survey station)

slide3

Manufacturer’s Recommendation for Setting up a Theodolite

1) Ensure that :-

  • the tripod head is approximately level
  • the tripod feet are firmly fixed in the ground
  • This should be done BEFORE removing the theodolite from its box.

2) Place the theodolite on top of the tripod, and tighten the centring screw to

clamp the theodolite centrally on the tripod head.

3) Use the optical plummet to focus onto the survey station (e.g. nail in top of peg)

  • Turn the optical plummet eyepiece to focus the reticle (i.e. the black
  • circular mark)
  • push (or pull) the optical plummet focussing ring to focus on the
  • survey station

4) By rotating the levelling foot SCREWS, using all three in a random manner if

necessary, centre the reticle (black circle) in the optical plummet onto

the survey station.

5) Carry out an approximate levelling. Using the pond bubble and by adjusting the

length of TWO tripod LEGS, bring the pond bubble into the centre of the

pond bubble tube.

slide5

Manufacturer’s Recommendation for Setting up a Theodolite

1) Ensure that :-

  • the tripod head is approximately level
  • the tripod feet are firmly fixed in the ground
  • This should be done BEFORE removing the theodolite from its box.

2) Place the theodolite on top of the tripod, and tighten the centring screw to

clamp the theodolite centrally on the tripod head.

3) Use the optical plummet to focus onto the survey station (e.g. nail in top of peg)

  • Turn the optical plummet eyepiece to focus the reticle (i.e. the black
  • circular mark)
  • push (or pull) the optical plummet focussing ring to focus on the
  • survey station

4) By rotating the levelling foot SCREWS, using all three in a random manner if

necessary, centre the reticle (black circle) in the optical plummet onto

the survey station.

5) Carry out an approximate levelling. Using the pond bubble and by adjusting the

length of TWO tripod LEGS, bring the pond bubble into the centre of the

pond bubble tube.

The theodolite is ROUGHLY LEVELLED AND CENTRED over the station.

slide6

(continued)

Manufacturer’s Recommendation for Setting up a Theodolite

6) Fine level the theodolite using the PLATE level bubble tube and foot SCREWS

  • Position a) align the plate level bubble tube with two foot screws.
  • Centre the bubble by rotating the two foot screws in opposite
  • directions. The bubble follows the LEFT thumb.
slide7

Position a

Bubble follows LEFT THUMB

slide8

Plate Level Bubble Tube

Required to move the

bubble to the right

Foot Screws

Bubble follows direction of left thumb

Both thumbs move in (or out)

slide9

Position a

Bubble follows LEFT THUMB

slide11

Manufacturer’s Recommendation for Setting up a Theodolite

6) Fine level the theodolite using the PLATE level bubble tube and foot SCREWS

  • Position a) align the plate level bubble tube with two foot screws.
  • Centre the bubble by rotating the two foot screws in opposite
  • directions. The bubble follows the LEFT thumb.
  • Position b) align the plate level bubble tube with the third foot screw.
  • i.e. 900 from position a)
    • Centre the bubble by rotating the the third foot screw (only)
    • The bubble follows the LEFT thumb.
slide12

Position b

900 to position a

Bubble still follows LEFT THUMB

slide13

Using the third

footscrew only

Select “Setting up a theodolite --- 3”

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