How to check error in Level machine

 How to check error in Level machine 

Two Peg test need to carry out before we start the leveling.

Job to ensure the instrument in good condition. Let us see below diagram how surveyor needs to do in field.

First, we need to measure by tape 30 m from point C to point A and B. You also can do by 25 m. Choose flat area for this test and observe the staff A and B.

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After that, the Auto level

move to point D where is about L/10 meter. L is total length from point A to B. Jot down the Staff A and B reading.

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WHAT IS SURVEYING AND SURVEY CATEGORIES?

Do comparison between 2 set of readings and the collimation should within 1mm. If more than that it is advised to do instrument calibration.

THANKS

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