What is the function of tribrach?

What is the function of tribrach?

A tribrach allows the survey instrument to be repeatedly placed in the same position over a surveying marker point with sub-millimetre precision, by loosening and re-tightening a lock to adjust the instrument base in a horizontal plane.

What is a laser plummet in surveying?

Omni’s OM100LP laser plummet is a high precision instrument with both up and down beams. Its easy to locate points vertically above and directly below a given reference point. The laser is widely used in the construction industry.

How do you set up a tribrach?

Set the tripod roughly above your reference point and tread the legs into the ground securely. The top of the tripod should be roughly chest level. This is the best height to then comfortably operate the survey equipment. Place the tribrach or the survey equipment on the tripod and secure with the locating screw.

How does an optical plummet work?

A device on some transits and theodolites; used to center the instrument over a point, in place of a plumb bob, which moves in a strong wind.

What is the meaning of Tribrach?

Definition of tribrach : a metrical foot of three short syllables of which two belong to the thesis and one to the arsis.

How do you set a transit level?

How To Set Up a Transit Level

1. Remove the level from the carrying case.
2. Place the level directly on the tripod head.
3. Thread or bolt the transit level onto the tripod base.
4. Remove the protective lens covers and place them in the carrying case.
5. Place the sunshade on the telescope.
6. Your transit level is mounted.

Are theodolites still used?

Though rarely used nowadays, the theodolite was the predecessor of modern survey instruments. It measures angles in the horizontal and vertical planes, and can be very accurate.

What is a tribrach used for in surveying?

A tribrach can come in handy when you need to use an optical or laser plummet. Plumb bobs can take up valuable time, and they can hard to use in the wind. Using a tribrach with a laser plummet can keep it level, but you can also use it with other survey instruments for the same purpose.

What can the auto-level tribrach be used for?

Our Auto-Level Tribrach (automatic tripod AD-12 Geo) is used for automatic leveling of laser and surveying instruments, most importantly, automated total stations. You can also use it for the automatic leveling of other devices with weights up to 10 kg.

What is the auto-level tribrach-AD-12 Geo with transport case?

Specto Technology is proud to offer the Auto-Level Tribrach – AD-12 Geo with transport case. Our Auto-Level Tribrach (automatic tripod AD-12 Geo) is used for automatic leveling of laser and surveying instruments, most importantly, automated total stations.

How do you place the tribrach over the tracing?

The placing of the tribrach over the tracing always leaves me a little uneasy. > Start with the tripod head approximately level so not much motion is required on the tribrach screws. > Mark a point on the floor, precisely level the tribrach, and center the image in the optical plummet.