Technetters,

     We are trying to determine the correct setting or pass/fail level
for our Ionograph. We have an Alpha Ionograph 500 M SMD II.  When
entering a new profile on this machine it defaults to 14.0 ug/in.
In an IPC publication, IPC-TR-551 the following pass/fail levels are
listed:

       Resistivity Extract                                           =
10.06 ug/in

       Ohmega meter (#'s 200,300,400,500,600)          =    14.0   ug/in

       Ionograph                                                        =
20.0   ug/in

These limits listed above are all equivalent to 2,000,000 ohm resistivity.
Am I correct in assuming this? May I then set my Ionograph at 20.0 ug/in
as my fail limit or coes my machine think it's an ohmege meter ?

Thanks for your help


Brett Austin
Nationwide Circuits, Inc

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