Varies according to instrument. There are differing scales and degrees of precision. Look up any catalog on surveying instruments and you will get some information, maybe more than you need, but you will get an idea. There are all different types, some heavily electronic
20 degree
To read the vernier on a theodolite, first ensure that the instrument is level and stable. Locate the main scale and the vernier scale; the reading is determined by finding the line on the vernier that aligns best with a line on the main scale. Count the number of whole divisions on the main scale up to this point and add the value of the aligned vernier division to get the final reading. This process allows for precise angular measurements, typically in degrees or minutes.
micro meter least count in British system
The formula to calculate the measurement using a vernier scale is: Measurement = Main scale reading + (Vernier scale reading × Least count) The least count is determined by the difference between one main scale division and one vernier scale division. This allows for more precise measurements by accounting for the additional fractional value indicated by the vernier scale.
In Vernier Theodolites, vernier are used for taking the readings. These theodolites are most commonly used in the general works. Most of the general Theodolites can read upto 20"
5 mm is the least count of theodolite.
least count of theodolite is 1 second
The least value which can be measured from any measuring instrument or device is called its least count. Generally the least count of a vernier caliper is 0.02mm.You can get a least count of 0.01mm in Digital vernier caliper.
20 degree
20 degree
Least Count [L.C]:-Least count is minimuim acuurate value meauserd by instrument.Least Count of Vernier Callipers:-The minimum value measured is 0.1mm but nowa days [l.c] is of 0.5mm.'
The least count of a vernier scale is calculated by dividing the smallest division on the main scale by the total number of divisions on the vernier scale. This calculation gives the value of one vernier division.
.02mm
To read the vernier on a theodolite, first ensure that the instrument is level and stable. Locate the main scale and the vernier scale; the reading is determined by finding the line on the vernier that aligns best with a line on the main scale. Count the number of whole divisions on the main scale up to this point and add the value of the aligned vernier division to get the final reading. This process allows for precise angular measurements, typically in degrees or minutes.
micro meter least count in British system
0.01mm
i think 0.01