How do you check an automatic level?
An automatic level is checked for accuracy by carrying out a two peg test. Here is a straight forward, easy to follow guide on how to perform a two peg test on an automatic level. This is straight forward and can be done on any site by any competent surveyor or engineer. This two peg test is for use on any automatic level like the Topcon AT-B4A.
Get your automatic level calibrated.
If, having checked your automatic level and you find that it is not giving the accuracy required then you should get it calibrated. Your local preferred survey supplies specialist will offer to service, adjust and calibrate your automatic level. This will be more cost effective than continuing to work with an automatic level giving out poor inaccurate levels.
Top Tip for Getting the Best Results When Checking Levels.
Whenever you are checking an Automatic (Dumpy) Level, or a Rotating Laser Level, or a Total Station, make sure that the tripod head is as close to being level as possible. Whenever I am carrying out these checks I like to use a bullseye spirit level like this one I bought from Amazon. Its 65mm diameter so it spans the tripod access hole and is large enough to be easy to set.