A leveling rod is a surveying tool used to measure elevation for land profiling. It comes in optical and digital versions, with accessories available. The original design was a high staff with measurement marks, but modern designs are more flexible. Digital versions have benefits such as automatic readings and logging data. Surveyors should test different models before selecting one.
A leveling rod is a surveying instrument used to take elevation measurements for the purpose of profiling a section of land. A number of basic models are available, including versions for optical and digital observation and record keeping. Surveying supply companies typically sell leveling bars and accessories such as cases, replacement parts, and other surveying tools. Engineers, surveyors, and members of other professions who have to survey are given instruction in the use of a grader rod as part of their education.
This instrument is also known as a level staff, a reference to the original design, which was simply a high staff with measurement marks. The surveyor could place personnel at a location with a landmark of known height, take a sighting as a reference, and then move personnel to perform a series of sightings, returning to the original site or other known reference for confirmation at the end. While older level staffs are still in use, modern designs are more flexible and tend to be easier to use.
It is common for a grader rod to bend, break, or collapse on itself. This makes it much easier to handle and transport when not in use. The surveyor can take the leveling rod to the site, assemble it, and lock the components into place to make sure they don’t slip during measurements. In the case of an optical device, the surveyor has a small target to use as a marker on the pole during sightings. Work with a partner to move the lens and log data.
Digital auctions can capture automatic readings. These have a number of benefits, including the ability to be used alone, rather than with a partner. They are also faster and can be more reliable. Operator errors are limited and the surveyor cannot miswrite a number or make a similar mistake because the auction automatically stores the data. It can also log conditions data and automatically make adjustments, if necessary, to address weather conditions that could affect measurements.
When a surveyor selects a grader rod, it can be helpful to test a few models. During training, surveyors usually have the opportunity to work with a variety of equipment and may develop a preference or receive a recommendation from an instructor. Some manufacturers will also allow surveyors to use their test equipment with a generous return policy.
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