AJ10-B1 Topcon Type Tribrach without Optical Plummet for Total
Station Theodolite
GNSS Survey Equipments
Model: AJ10-B1
Specifications
| Model | AJ10-B1 |
| Color | Yellow |
| Optical Plummet | No |
| Weight | 670g |
| Material | Aluminum |
| Package | Individual Box Package |
| Accuracy | Torsional stiffness <2" |
| Type | Survey Instrument Accessory |
| Bubble | 8' Circular Bubble |
| Used For | All motorized instruments |
Features:
Yellow Tribrach without Optical Plummet
Topcon style
With locking forced-centering knob
5/8*11 base
8-minitue circular vial
The tribrach and optical plummet are of robust construction and
suitable for long period exposure in all enviornments.
Tribrach
A tribrach is an attachment plate used to attach a surveying
instrument, for example a theodolite, total station, GNSS antenna
or target to a tripod. A tribrach allows the survey instrument to
be repeatedly placed in the same position over a surveying marker
point with submillimetre precision, by loosening and re-tightening
a lock to adjust the instrument base in a horizontal plane.
How do tribrachs work?
A tribrach uses an optical plumb sight for vertical orientation.
Rough field conditions can jar the optical plumb sight out of
adjustment, leading to inaccurate measurements by survey
instruments mounted on the tribrach. Readjustment is relatively
easy to do. Set up the surveyor’s tripod and attach the tribrach to
the tripod head.
How to make a tribrach on a tripod?
Mark a point on the floor, precisely level the tribrach, and center
the image in the optical plummet. Draw a pencil line on the tripod
head precisely outlining the tribrach. Rotate the tribrach 120
degrees and fit it to the pencil outline.
Can I use a tribrach with a total station?
You can use a laser tribrach with any type of laser measuring tool,
but you can also use it with a total station or any other surveying
instrument. This device will allow you to attach your instrument to
a tripod, so it can be more stable while you’re using it.
