Re: [ATM] Question about "Null-testing"

["David Harbour" <scarab2@cox.net>]

To all:

One time this famous atm (reeferred to near the bottom of the post) even
tested a large mirror on the specular reflection of the sun on a Raven's
cornea. Obliging of the bird to hold still long enough, I would say. A Raven
might do something this courteous for someone famous, but not an ordinary
Joe like me.

An excellent variation which I have used and is very satisfactory is the
Chrisstmas tree ornament test.

Dave


----- Original Message ----- 
From: "hermit" <hermit@outofoptions.org>
To: "John Moore" <jamoore42@yahoo.com>
Cc: "ATM list" <atm@atmlist.net>
Sent: Monday, July 04, 2005 4:31 PM
Subject: Re: [ATM] Question about "Null-testing"


> John Moore wrote:
>
>  >Hi ALL !,,
>  >
>  >Jerry <wa4guu@verizon.net> wrote:
>  >
>  >****The one thing that has not changed is that bench testing is for
> getting
>  >atm's close enough to star test the mirror.
>  >****
>  >
>  >"Close enough..." implies you get a rough curve bench testing "... to
star
>  >test..." implies you then fine figure by star testing. May be that I
>  >misunderstand.
>
> No, you do indeed misunderstand.  Star testing is a final test.  Any
> implication comes from reading something in that I didn't write. You
> can, but don't have to, figure using the results of the star test. My
> original post was aimed at keeping the original poster from thinking
> that there was some magic bullet of a test.  My intent was to remind him
> that the star test is the ultimate final test.  Period.
>
>  >Therefore I believe that if ATM's are bench testing only to get close
> enough
>  >to star test, there indeed has been a change.
>
> You are adding words.  I did not say "only".
>
>  >
>  >JERRY,
>  >
>  >ATM mailing list http://www.atmlist.net/
>  >
>  >
> --------------------------------------------------------------------------
--------------
>  >
>  >Thanks Jerry,
>  >
>  >
>  >Even  a man we all Know and admire,,, He tests by an artificial star
>  >
>  >reflected off a power-pole transformer [yes him] ,
>
> Check the archives.  Most of the admiration has little to do with his
> testing techniques. ;-)
>
> Again, the star test is the closest thing to a traceable standard that
> the ATM has.  How many, if any, ATMs will have certificates of
> traceability to a standard on ANY for any of their equipment.
>
> Ken
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>


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