Mel,
Why omega meter is not good for water soluble fluxes? I thought it
extracts using IPA/DI mixture, it should extract water soluble flux
residue readily.
jk
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Mel Parrish
>Sent: Friday, December 20, 2002 9:15 AM
>To: [log in to unmask]
>Subject: Re: [TN] Cleanliness measurement equipment
>
>
>Hi Peter,
>Can't imagine the Omega meter type of tests to be of any
>value. Especially when considering the use of Water Soluble
>fluxes. Why not send them out for test to someone that can
>justify the capital investment for serious cleanliness test resources.
>
>Mel Parrish
>Director, Training Materials Resources
>Soldering Technology International
>102 Tribble Drive
>Madison, AL 35758
>256 705 5530
>256 705 5538 Fax
>[log in to unmask]
>www.solderingtech.com
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]]On Behalf Of
>[log in to unmask]
>Sent: Thursday, December 19, 2002 10:16 PM
>To: [log in to unmask]
>Subject: [TN] Cleanliness measurement equipment
>
>
>Dear All,
>
>What would your recommendations be for equipment to measure
>board cleanliness under the following circumstances?:
>
>Number of boards = 10 pcs per month up to a total of 280
>boards. Board size = typically VME - approx 9.5" x 6.5" Board
>type = FR4, Class 3, 10 or 12 layer ENIG or HASL finished.
>Assembled with 63/37 solder paste and water-soluble flux,
>reworked using Kester 63/37 cored solder with compatible w/s
>flux Other main residues would come from fingerprint oils and
>residues from stripping Humiseal off boards using Conformox or Forane.
>
>I am trying to set up a new capability here and am looking for
>the least expensive equipment that will reliably measure
>genuine cleanliness levels down to 0.02ug NaCl eq/cm^2. I can
>only justify equipment expenditure against this one small
>contract that involves a total of 280 boards, hence the need
>for cost-effective (aka low-cost) choices. So far, I see that
>the Omegameter still features heavily in discussions on this
>topic - is it still a good tool to use, or is it's technology
>too old now to be capable of measuring accurately the high
>levels of cleanliness demanded by today's high-reliability
>electronics? Other options, like the Zero-Ion, or Concoat's
>Contaminometers, good as they seem to be, are several
>magnitudes more expensive and harder to justify as a result
>unless there's a good reason why less expensive options are
>not suitable.
>
>I could also use your recommendations on SIR test equipment.
>
>Thanks for any help you can offer.
>
>Peter
>
>---------------------------------------------------
>Technet Mail List provided as a free service by IPC using
>LISTSERV 1.8e 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 or
>(re-start) delivery of Technet send e-mail to
>[log in to unmask]: SET Technet NOMAIL or (MAIL)
>To receive ONE mailing per day of all the posts: send e-mail to
>[log in to unmask]: SET Technet Digest
>Search the archives of previous posts at:
>http://listserv.ipc.org/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
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
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
or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
archives of previous posts at: http://listserv.ipc.org/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
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/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
-----------------------------------------------------
|
