Trimble Business Center

Hello everyone! I just purchased a Trimble DiNi 0.7 Digital Level and am studying the features.

In YouTube, I found someone used a simulator. However, I cannot find the download link. Can anyone tell me how to get the simulator?

Also, it gives many measuring methods. I can understand the 'BF' mode, but cannot understand others like 'BFFB', 'BFBF', 'BBFF', and 'FBBF'. Why should we measure the backsight and foresight for multiple times? Can anyone explain it to me? Thank you!

Hi Chao,

Depending on your requirements, these are different line levelling methods, e.g., you can complete one-way levelling using BFFB method (this gives you dual measurements per line). From one instrument setup, measurements will be taken at Backsight (1) - Foresight (2) - Backsight (1) - Foresight (2). before moving to the next setup. I guess people use this method to avoid having to level back to the start point and for more precise measurement?

As you mentioned - I prefer two-way / Loop levelling where you start and end on the same point - BF. 

Found a bit of a discussion here - 

https://rpls.com/forums/discussion/leveling-procedures-observing-sequence/ 

Sorry, not sure about the emulator - May have to ask your local sitech dealer.

Hello everyone! I just purchased a Trimble DiNi 0.7 Digital Level and am studying the features.

In YouTube, I found someone used a simulator. However, I cannot find the download link. Can anyone tell me how to get the simulator?

Also, it gives many measuring methods. I can understand the 'BF' mode, but cannot understand others like 'BFFB', 'BFBF', 'BBFF', and 'FBBF'. Why should we measure the backsight and foresight for multiple times? Can anyone explain it to me? Thank you!

BFFB is used for highest accuracy level runs. You use two level staffs simultaneously, it's a 3 men job.

Main purpose is to evaluate the sinking of the change plates or your instrument while you do the measurement. If sinking occurs, then the difference between BF and FB will not match, and you do the reading again.

You still do the level run forth and back. Edwards suggestion is not the idea behind BFFB. From one BFFB observation (4 staff readings) you only get one single elevation difference.

You also want to use an even number of instrument setups between your control marks. The level staffs will have a minute but existing zero-point manufacturing deviation from each other.

With an even number of setups the reading on your control mark will be on the staff you took your first backsight to. And voila, there is no difference/error anymore.

That was a rather short version.

Hi Chao,

Depending on your requirements, these are different line levelling methods, e.g., you can complete one-way levelling using BFFB method (this gives you dual measurements per line). From one instrument setup, measurements will be taken at Backsight (1) - Foresight (2) - Backsight (1) - Foresight (2). before moving to the next setup. I guess people use this method to avoid having to level back to the start point and for more precise measurement?

As you mentioned - I prefer two-way / Loop levelling where you start and end on the same point - BF. 

Found a bit of a discussion here - 

https://rpls.com/forums/discussion/leveling-procedures-observing-sequence/ 

Sorry, not sure about the emulator - May have to ask your local sitech dealer.

Hello everyone! I just purchased a Trimble DiNi 0.7 Digital Level and am studying the features.

In YouTube, I found someone used a simulator. However, I cannot find the download link. Can anyone tell me how to get the simulator?

Also, it gives many measuring methods. I can understand the 'BF' mode, but cannot understand others like 'BFFB', 'BFBF', 'BBFF', and 'FBBF'. Why should we measure the backsight and foresight for multiple times? Can anyone explain it to me? Thank you!