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Quick and Easy Checks on Automatic (Dumpy) Levels.

How to do Quick and Easy Checks on Automatic (Dumpy) Levels. When you feel that you haven’t the time to do a full two peg test on an Automatic (Dumpy) Level, then these quick and easy checks will give you confidence that you are getting the right results. Closing a Levelling Run is a Good Check on Automatic (Dumpy) Levels. …

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How to check a rotating laser?

How to check a rotating laser? Here is a straight forward, easy to follow guide on how to check a rotating laser.  This is straight forward and can be done on any site by anyone.  It is a more detailed version of a two peg test that are used to check auto levels, like the Topcon AT-B4A.  If you are …

How to Set Up Prism Stations Above a Known Point

This guide is suitable for setting up Prism Stations.  This method is the best practice for all Prism Stations, as it prevents the Prism Stations from being subjected to shocks or undue forces during the adjustment process. Remember that before setting up any prism station on a tripod it is important to know that the tripod you are using is …

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Topcon DT-205 Theodolite

The Topcon DT-205 and the Topcon DT-205L are part of the Topcon DT-200 series of theodolites. They have remained unchanged for a number of years, testament to the design of the theodolite. These theodolites are straight forward to use and fast to setup, ideal for busy construction sites.  The screen and interface on the Topcon DT-200 series is simple to …

How often should you check a rotating laser?

How often should you check a rotating laser? We would recommend that site staff should check a rotating laser for accuracy every week.  This site check should also be logged and stored with the Calibration Certificate for the rotating laser.  Any deterioration in the accuracy of the rotating laser can then be easily identified and the rotating laser can be …

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Topcon DL-503 Digital Level

If you have been using optical levels, like the Topcon AT-B4A or the Topcon AT-B3A, and you need the next step up in accuracy for your levelling work then you need to consider investing in a Digital Level like the Topcon DL-503.  The Topcon DL-503 is the entry level Digital Level in the Topcon Range. Both the Digital Levels produced …

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Topcon DT-207L Theodolite

The Topcon DT-207 and the Topcon DT-207L are part of the Topcon DT-200 series of theodolites. They have remained unchanged for a number of years, testament to the design of the theodolite. These theodolites are straight forward to use and fast to setup, ideal for busy construction sites.  The screen and interface on the Topcon DT-200 series is simple to …

How do you check an automatic level?

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 …

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The New Topcon AT-B2 Accurate Auto Level

The Topcon AT-B2 is the most accurate Auto Level in the AT-B Series from Topcon and supersedes the previous Topcon AT-B2 model that was based on the Sokkia series of Auto Levels.  There are 3 models in the Topcon AT-B range, the Topcon AT-B4A, the Topcon AT-B3A and the Topcon AT-B2. Topcon describe the AT-B series of Auto levels as …

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How to check a Rotating Laser

Checking any Rotating Laser for level accuracy uses the same principle as checking a dumpy or Automatic Level, which is we should have the same height difference of two points when measured from different positions and different lengths of sight.  However there are more steps involved for the rotating laser check than a two peg test for checking an Automatic …