Chemical smell can be very operator dependent. For example, some operators
are very sensitive to terpenes while others (like myself) are not or have
become desensitized. The best guideline is to follow the OSHA guidelines on
chemical smell.

Drag out rate and chemical loss are based on the frequency of use, the
operating temperature, the type of chemistry, and the amount of exhaust. The
equipment's exhaust can increase the amount of chemical loss by an order of
magnitude, depending upon the chemistry and operating temperature. Suggest
running hardware through the system for a given period of time, and
measuring how much fluid you would have to add to fill the unit.

Your equipment and solvent supplier should have some data on drag out and
chemical loss, but such data is dependent upon how the equipment is
installed. For example, identical sets of cleaning equipment can have
different loss rates, depending upon the amount of operation, temperature,
exhaust.

Hope this helps.

Lee Whiteman
Senior Manufacturing Engineer
E-Mail: [log in to unmask] <mailto:[log in to unmask]>
Ph: (610) 362-1200 x208
Fax: (610) 362-1290



> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Peter Lee
> Sent: Thursday, September 12, 2002 10:41 AM
> To: [log in to unmask]
> Subject: [TN] Qualification of In-line clearner
>
>
> Technet,
>
> I am looking for guidelines in commissioning a new in-line cleaner and
> process (for no clean and OA).
>
> What are some of the critical items to be considered?
>
> I have the followings:
> 1) Visual inspection for residues (noclean)
> 2) Ionograph results (OA)
> 3) All seals and materials must be compatible with our Chemistries
> 4) Performance of dryer section- Not sure how to measure yet
> 5) Does not remove solder mask
> 6) CSA certifiable
> 7) Sound levels must be 80 dBA or lower at exit
> 8) Leakage from exhaust
> 9) Chemical smell?
> 10) Cleanliness under fine pitch devices or BGAs??
> 11) Drag out rate and chemical loss?
>
> how to measure 9) to 11).
>
>
>
> Rgds,
> 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
---------------------------------------------------------------------------------