LOL........And that is why there is a big sign right on the door saying "No
Flammables!"
Lloyd E Duso
Plant Manager
(814) 535-3505
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Tuesday, February 05, 2013 1:50 PM
To: [log in to unmask]
Subject: Re: [TN] Manncorp Trident Batch cleaner Onboard Cleanliness tester
BOOM!!!!
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Popielarski
Sent: Tuesday, February 05, 2013 11:21 AM
To: [log in to unmask]
Subject: Re: [TN] Manncorp Trident Batch cleaner Onboard Cleanliness tester
WARNING: Do NOT attempt to put 75% IPA in this equipment! <wink>
Ed Popielarski
Engineering Manager
970 NE 21st Ct.
Oak Harbor, Wa. 98277
Ph: 360-675-1322
Fx: 206-624-0965
Cl: 949-581-6601
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Richard Kraszewski
Sent: Tuesday, February 05, 2013 5:55 AM
To: [log in to unmask]
Subject: Re: [TN] Manncorp Trident Batch cleaner Onboard Cleanliness tester
Also remember that the ROSE tester 10.06 value is based upon the resistivity
in 75/25 alcohol water solution rather the merely straight di water as seen
in the batch cleaner. The conductivity to soil factors will completely
different, so values will not correlate at all.
Rich Kraszewski
PLEXUS
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Watson, Howard A
Sent: Monday, February 04, 2013 8:33 AM
To: [log in to unmask]
Subject: Re: [TN] Manncorp Trident Batch cleaner Onboard Cleanliness tester
Ed,
Thanks for the info. It does make sense to use it only for process control.
I do wonder if the resistivity probe will have long term repeatability, or
maybe it will get gunked up and drift.
Thanks!
Howard A. Watson
Phone: 505-665-3402
-----Original Message-----
From: Ed Popielarski [mailto:[log in to unmask]]
Sent: Friday, February 01, 2013 3:21 PM
To: [log in to unmask]; Watson, Howard A
Subject: RE: Manncorp Trident Batch cleaner Onboard Cleanliness tester
Howard,
The resistivity monitor on the cleaner is intended to be a process control,
not a spec. qualifier, i.e., if you always run 20 boards (same P/N) to a
specific resistivity in the cleaner rinse cycle, you could expect similar
results on ROSE testing between batches. This doesn't tell you if you meet
10 ug NaCl/sq in or not, it can only tell you you've done the same as
previously.
Ed Popielarski
Engineering Manager
970 NE 21st Ct.
Oak Harbor, Wa. 98277
Ph: 360-675-1322
Fx: 206-624-0965
Cl: 949-581-6601
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Watson, Howard A
Sent: Friday, February 01, 2013 1:47 PM
To: [log in to unmask]
Subject: [TN] Manncorp Trident Batch cleaner Onboard Cleanliness tester
Hi all,
My shop just bought a batch cleaner (dishwasher type); the manual says it is
Aqueous Technologies, with an onboard cleanliness tester. This is a
resistivity meter that measures the resistance of the rinse water, and I
believe it has a range of 2k to 2000k ohm. This unit has both a closed-loop
wash and rinse, and we are using DI water. Does anyone have any experience
with this type of cleaner with an "onboard cleanliness tester"? Is this
mostly for process control? The manual is recommending a baseline
cleanliness of 200-400 kOhm. I realize that this tester is not going to
provide a level of cleanliness or contamination of each board processed, but
I'm not sure what it is good for other than indicating the rinse water needs
to be changed.
I was not involved in the selection of this system, but tasked with
qualifying it. My previous experience has been with no-clean processes, so
cleaners are new to me! I should add that currently we process a very small
volume of PCBAs for space. All work is hand assembly and cleaning is by hand
with Ensolv. The goal is to get away from Ensolv while still achieving clean
boards. This shop has never done ionic contamination testing, ROSE, SIR,
etc. I believe some people were sold on the "onboard cleanliness tester" as
a cure-all for aqueous cleaning validation, but I'm skeptical as to the
benefits. Any insight is appreciated.
Howard A. Watson
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