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Fri, 27 Sep 2002 09:09:37 +0200 |
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Hi Daan,
You can find information about that at
http://www.timcousins.com.au/download/IonicContaminationHistory.pdf. I will
also send you a paper discussing this off-line.
Per-Erik Tegehall
IVF, Sweden
-----Ursprungligt meddelande-----
Från: d. terstegge [mailto:[log in to unmask]]
Skickat: den 27 september 2002 08:37
Till: [log in to unmask]
Ämne: [TN] Ionograph measurements
Hi Technet,
One of our customers is complaining that the upper limit for our
ionograph test is set at 3.1 micrograms/cm2 instead of the 1.56
micrograms/cm2 that the IPC/EIA J-STD-001C prescribes is section 8.3.6.
I know there exists a document (probably an IPC or MIL-spec)
explaining how the 1.56 limit should be corrected for the exact type of
machine. For the Alpha Ionograph 500M the conversion factor is 2,
resulting in the 3.1 micrograms/cm2 limit.
However I can't remember where exactly this information can be found,
and I don't even know if it's still valid. Does anyone has a clue for me
?
Daan Terstegge
Unclassified mail
Personal Website: http://www.smtinfo.net
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