TECHNET Archives

May 2001

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
David Hillman <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 29 May 2001 16:25:16 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (74 lines)
Hi Don! A weight gain test is very "tricky" test to accurately use for any
purpose. I have done a number of internal investigations concerning
component moisture uptake and cleaning processes using weight gain as my
response measurement. You need a very accurate balance (X.XXX) with enough
range to weigh your item of concern, any handling residues (such as hand
oils) can invalidate weight measurements, and the transfer/dwell time for
the weight measurement can negatively or positively influence you data set.
I would recommend exploring other possible test methods rather than use a
weight gain method -  too many external influences which can impact your
data set. Good Luck.

Dave Hillman
Rockwell Collins
[log in to unmask]




"Steffen, Don E" <[log in to unmask]>@IPC.ORG> on 05/29/2001 07:58:19 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to "Steffen, Don E" <[log in to unmask]>

Sent by:  TechNet <[log in to unmask]>


To:   [log in to unmask]
cc:

Subject:  [TN] Weight Gain Testing




Technetters

Is there anyone out there in the TechNo world that has performed a Weight
Gain Test. I am deriving a Board Cleaning Spec and the amount of moisture
gain in the printed wiring boards is an attribute that I want to track in
order to minimizing the chances of "Popcorning" internal the PWB. I do not
want any delamination to occur since we are processing material in
multilayer.

Any help you can give me would be appreciated.

Donn E Steffen
Senior Quality Engineer
VDO Control Systems
Ph# 219-920-6052
Fax# 219-925-8710
Cell# 219-417-2926
Pager# 219-430-2826


-----------------------------------------------------------
This Mail has been checked for Viruses
Attention: Encrypted Mails can NOT be checked !

***

Diese Mail wurde auf Viren ueberprueft
Hinweis: Verschluesselte Mails koennen NICHT geprueft werden!
------------------------------------------------------------

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------

ATOM RSS1 RSS2