After you get the unit supported you need to calibrate the base station using readings from a least 3 different points, but preferably 5 points. In order for base station to give you the proper grading information it has to have errors of less than .05' if it is over that the unit needs to be recalibrated Cigarettes Online USA. If the unit cannot be calibrated to .05' then the engineer has to be contacted to verify the coordinates of the project.

After the base station is set up the rod that is supplied is used to set up specific points that are needed to give the proper site grading. Cut and fills are easily established using the GPS. Installation of man holes Cigarettes Online Free Shipping, road grading and underground utility runs can also be laid out with the GPS. When using the rod the trades' person has to take care to keep it plumb so that the points are installed correctly.



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