maurieo's Two Peg Test for Levels

www.maurieo.com [e-mail]
A look at the standard two peg tests for optical and digital levels, how it works and why with an explanation of the rational behind it. Everyone using a level should be able to do this very simple test to check that the level is within calibration or in need of servicing. Whether you are using a dumpy level or first order digital level you need to be able to know and understand the two peg test.

[@evianpullman7647]

Can you remake a video on field method to check or recheck the prism constant setting on a total ststion; say like a different brand of prism to total station and proper +/- sign?!!, THANKS !,

[@maurie0]

I will see how I go for time. will have a look at what I have. Cheers

[@maurie0]

Hi I checked through my other videos and i think this one might help you
ruclips.net/video/J45bRUUYrAk/видео.html
Cheers
Let me know if it helps

[@ashw730]

Maurieo could you pls do videos on joints and radiation? With drawings like this. i mean with the procedure.tks

[@maurie0]

Do you mean something like this ruclips.net/video/a_r7OzFEJ5M/видео.html
I can do one on radiations over the weekend

[@maurie0]

This one will be uploaded soon ruclips.net/video/6eFbliWXk6E/видео.html

[@Jaydon-dw4dt]

I agree please do

[@alexandredoprado9241]

What is the acceptable error? Is there some official standard that define the acceptable error?

[@maurie0]

It depends on the accuracy of the level you are using and the job you are using it for. Generally we use standard construction levels which in NZ are considered suitable for 3rd order levelling and usually go with 1 mm per 10 metres as being acceptable (Rule of Thumb). The levelling standards in NZ are generally set by LINZ so you use a level appropriate to the required standard/level and match the acceptable two peg tolerance to that. I am not a Geodosist or Academic, my answer is based on experience at the lower end of the levelling spectrum I have not done any significant precise levelling. A more detailed answer would be given by a geodosist / academic. You instrument service specialist would have a good answer also.