Thank you for your thoughts on this.  I agree that change is possible.  That said, this baseline is on very flat ground, and as of yet, I do...

If you are referring to the calibration report that I posted, the "residual" ranges from -.006 feet to +.005 feet, but please note that is only AFTER ...

Thanks, Tom.  My dealer said he'll be able to tell me whether he agrees with our baseline effort.  I'll post here again once I hear back.

John, Thanks for referencing Dr. Rueger's book.  I have just now ordered a used copy of the third edition.  Can't justify spending over $10...

John, From what you’ve seen or learned, is there a tendency for the frequency of an oscillator to drift upward over time?  If I understand...

While I’m questioning just about everything about how I performed the calibration, and what might be the cause of the scaling,  I am confid...

John, Thank you for your post, and for the detailed and interesting information about this subject. It is hard to find much about this on the Interne...

John, I am the second owner of the instrument. I Purchased it used last fall. Iƒ??m not sure exactly how old it is, but I would estimate that it is le...

Subscribing to the topic.

I sent my instrument to the dealer. BTW, I just did some calculations on how atmospheric conditions affect EDM measurement.?ÿ I used the formula from ...

Sorry, just seeing the replies now (need to figure out how to get notifications when someone replies). Bill93, I performed the calibration on a Topcon...

If you center the bubble inside of the typical bullseye circle found on a prism pole (as the original post suggests), is the angular specification of ...

Daniel Ralph, post: 450352, member: 8817 wrote: I have a 4' length of 4" abs (black) with a plastic cap that has a drawer pull on it zip tied to the r...

Brad Ott, post: 445116, member: 197 wrote: Sweet. Keep us posted. Maybe share a link or some photos?Brad, here is a link to the pole system I just o...

Brad Ott, post: 436014, member: 197 wrote: I don't know my Leica pole model number but I have made the 4.5' to 6.5' range work for me.But I do miss th...

Because I have used Topcon and Sokkia instruments for many years now, I have never used the Leica style prism poles with the Leica bayonet tip. But s...

Jim Frame, post: 436076, member: 10 wrote: Here you go: Finding the proper aluminum tubing to use was not especially easy. There are MANY differen...