Field Exercise: Collimation Error
Purpose: To determine the degree of
collimation error in an auto level.
Procedure: Find a relatively level area.Set up the auto
level at C. Using stadia techniques, locate points A, D and B as
shown in the figure. All four points should be on a straight
line. Points A and B should be located on a solid surface.
Read the rod at A and B.Move the level to D and again read the rod at A
and B. Record the serial number of the level.
Calculations: Calculate the slope of
the telescope. Note whether the level reads high or low.
Instruments:
Auto Level (with Stadia, k = 100) and Tripod
Philadelphia Rod
Set of Taping Pins
2 Range Poles
