Understood and points all well taken. 

Unfortunately, occasionally it takes ~forever to get something written
into a customer specification and then an act of congress to take it
out. 

Again, thanks for the good discussion.  

Rich Kraszewski
(920)969-6075

-----Original Message-----
From: Graham Naisbitt [mailto:[log in to unmask]] 
Sent: Thursday, February 16, 2012 4:01 PM
To: TechNet E-Mail Forum; Richard Kraszewski
Subject: Re: [TN] Correlation Factors for ROSE Testing

Hi Rich

Why?

The whole idea of a correlation factor is nonsense which is why it was
removed.

Consider: ALL systems SHOULD be capable of detecting a given amount of
CALIBRATING solution that is CALIBRATED to a given amount of NaCl
solution. If they can't detect that solution that has been injected into
the test chamber that has reached and been tared to "zero", then you
have a system that is RIRU = Rubbish In Rubbish Out.

Keep in mind that every degree of temperature change affects the value,
so keeping everything under really close control is vital to avoid false
positives or false negatives.

As said so many times before, this test method is ONLY really suited to
keep your process under control and every process line will yield a
different "cleanliness" value.

In closing - anyone who has asked for the "correlation factor" and are
unable to grasp this method - direct them to the TechNet archives where
there are almost acres of print on this topic.

I hope this helps but will be happy to answer any questions.

Graham N - Gen3 Systems

  
On 16 Feb 2012, at 19:59, Richard Kraszewski wrote:

> While I realize that IPC specifically and the industry in general,
does not support the use of ROSE correlation factors for the various
testers, I have a need to see the official document that at one time
quoted these specifically allowed factors.
> 
> I took a cursory look though all 230 pages of IPC TR 583 and didn't
see that table. 
> 
> I seem to recall a military specification that had that table. Was it
454? 28809, 2000?
> 
> Does anyone recall?
> 
> 
> Rich  Kraszewski / PLEXUS
>  
> 
> 
> 
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud
service.
> For more information please contact helpdesk at x2960 or
[log in to unmask] 
> ______________________________________________________________________


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________