Franklin,

If the testing and observations are identical there is no reason why you couldn't just cut two reports.  I think this would fly for delam and DWV (you pass through 500V on your way to 1000V).
However, for MIR your customer may have a legitimate concern.  DSCC intends to raise the bar with 500V MIR.  In practice, it sometimes lowers the bar.  The equipment used calculates R by measuring I.  Sometimes (maybe 1 out of 20 samples that I've look at for this phenomena) the leakage current is rather constant no matter what voltage is applied.  So, when you raise the applied voltage, the sample appears better than it actually is.
Of course, in some cases 500V raises the bar, but in these cases you often have a DWV failure.
Historically, the 500V was necessary to get satisfactory SNR, not today.  Today, all it does is greatly increase the cost of the switching.  At any rate, DSCC's hands may be tied because of the huge amount of historical data at 500V.

You could take a strict SI stance and normalize your results with respect to current, e.g. make a statement "my R (calculated to show conformance with IPC) >= 1/5 (R obtained by testing at 500V).

All of this said, the path of least resistance (pun intended) would be to just test twice.

Chris

Chris Mahanna
Quality Manager
Robisan Laboratory Inc.
6502 E 21st Street
Indianapolis, Indiana 46219
phone 317.353.6249
fax 317.917.2379


-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]]On Behalf Of Franklin D
Asbell
Sent: Tuesday, June 13, 2006 3:52 PM
To: [log in to unmask]
Subject: [IPC-600-6012] Table 4-4 -vs- MIL-PRF-55110 table A-V


I am curious to know if IPC (or members of this subcommittee) has on opinion
on quality conformance testing differences between IPC-6012 table 4-4 and
MIL-PRF-55110 table A-V (group B).



Historically I have used the group B results as compliance to table 4-4 and
know many other companies apply this practice also. To date it has not been
a problem but I now have a situation where one customer is not accepting
group B results due to higher voltage during MIR/DWV testing and
MIL-PRF-55110 allows delamination (within limits, although the test results
state no delamination present) and table 4-4 (or IPC-6012) does not allow
delamination.



So.I was hoping to gain others (including IPC representatives) perspective
and/or opinion.



Thanks,



Franklin D Asbell