Download DIN 18723

Steward Souten, post: 439964, member: 12714 wrote: Can anyone point me to where I can download DIN 18723 standard.

I was where you are not long ago. I concluded that this DIN standard is not available online. You have to buy it, and it's not cheap. As in if you buy into the DIN program they will send people to your factory to read it to you.

Mark Mayer, post: 439988, member: 424 wrote: I was where you are not long ago. I concluded that this DIN standard is not available online. You have to buy it, and it's not cheap. As in if you buy into the DIN program they will send people to your factory to read it to you.

That is ridiculous, it doesn't help people like me who are new to surveying and trying to learn about errors etc.
Really bad practise.

Steward Souten, post: 439997, member: 12714 wrote: That is ridiculous, it doesn't help people like me who are new to surveying and trying to learn about errors etc.

You don't really want to know about how they come up with the number for your instrument. You want to know what to do with the number. Ghilani/Wolf's https://8c230d1f-a-62cb3a1a-s-sites.googlegroups.com/site/dfgrhy6u756/freepdf-Elementary Surveying (14th Edition)-.pdf?attachauth=ANoY7co5q6IXdcj83z4HDNlM0OddnpZIszLaiXEFDwcPKhvTEdkh5TVvOBzrMbF5DW5793wiIQFxW5qprbizs2Qm5kImO0dZr6D6IoReBk3TmIKMke-gdq4sT_sMqtt0zpOGgylu3pIoy85ewgnvLB_UXc--76chbMlSzu5Xfj0Kl4jtu72CDDX0mdGL423aAte9jUk2NEWzA9vdupkZ49KzR1yOVG3TPfVK57GWB3kVduCuET2njSVQGWV4iqNIdRy0qIuP3CVG&attredirects=0'">Elementary Surveying has some good stuff on that. (Thanks to GeeOddMike for the link to the downloadable version). Ghilani's Adjustment Computations goes into greater depth.

Older editions of Elementary Surveying can be had at Alibris.com for a nominal amount.

Mark Mayer, post: 440009, member: 424 wrote: You don't really want to know about how they come up with the number for your instrument. You want to know what to do with the number. Ghilani/Wolf's https://8c230d1f-a-62cb3a1a-s-sites.googlegroups.com/site/dfgrhy6u756/freepdf-Elementary Surveying (14th Edition)-.pdf?attachauth=ANoY7co5q6IXdcj83z4HDNlM0OddnpZIszLaiXEFDwcPKhvTEdkh5TVvOBzrMbF5DW5793wiIQFxW5qprbizs2Qm5kImO0dZr6D6IoReBk3TmIKMke-gdq4sT_sMqtt0zpOGgylu3pIoy85ewgnvLB_UXc--76chbMlSzu5Xfj0Kl4jtu72CDDX0mdGL423aAte9jUk2NEWzA9vdupkZ49KzR1yOVG3TPfVK57GWB3kVduCuET2njSVQGWV4iqNIdRy0qIuP3CVG&attredirects=0'">Elementary Surveying has some good stuff on that. (Thanks to GeeOddMike for the link to the downloadable version). Ghilani's Adjustment Computations goes into greater depth.

Older editions of Elementary Surveying can be had at Alibris.com for a nominal amount.

Thanks Mark

Deutsches Institut f?¬r Normung e.V. German Institute for Standardization,
is a manufacturing standards organization for technology. You pay a healthy fee if you want to say that your product in fact meets those standards.

If you were given those DIN specs there is no way you good in fact do the actual tests. Having seen part of the specs many years go I will cite some of the test requirements. A pedestal mount for the instrument, precise optical targets pedestal mounted, which have a lens system such that you are focusing on infinity. In other words each target is more expensive than your instrument. You must be able to or pay someone to provide pedestal locations much more precisely than your test goals. Trust the fact the standards are met in the manufacture of your instrument as there is sufficient monies involved for the DIN people to go after those who falsely claim they meet the standards.

What you need to learn is what you have to do in the field to give your instrument a chance at conforming to the expected precision.

Paul in PA

Paul in PA, post: 440234, member: 236 wrote: Deutsches Institut f?¬r Normung e.V. German Institute for Standardization,
is a manufacturing standards organization for technology. You pay a healthy fee if you want to say that your product in fact meets those standards.

If you were given those DIN specs there is no way you good in fact do the actual tests. Having seen part of the specs many years go I will cite some of the test requirements. A pedestal mount for the instrument, precise optical targets pedestal mounted, which have a lens system such that you are focusing on infinity. In other words each target is more expensive than your instrument. You must be able to or pay someone to provide pedestal locations much more precisely than your test goals. Trust the fact the standards are met in the manufacture of your instrument as there is sufficient monies involved for the DIN people to go after those who falsely claim they meet the standards.

What you need to learn is what you have to do in the field to give your instrument a chance at conforming to the expected precision.

Paul in PA

If one is making a mental or mathematical model of the sources of errors in a system, it helps to understand what a statement about accuracy/error/precision... received from another really means. An understanding of the test process used to obtain the accuracy/error/precision statement may help one to understand the meaning of the statement, even if one cannot carry out the tests oneself.