Hi everyone,

I recently implemented closed loop water recycling in an OA flux
environment.  Resistence of treated water going back to the cleaner have
been about 18 meg ohm resistence.   To give you some idea of usage, the
process has been running for 2 months using about 600 gallons of make up
water(city water).  However, in the past three days it has gone from 18
meg ohm to about 10 without any abnormal usage.  I have two questions?

1.  Is this normal?  Does the ion exchange unit go out that quickly or is
it more gradual?

2.  What is considered to be acceptable resistence level in the DI water
for PCB Assembly cleaning?


Thanks in Advance
Thomas Han
Ardent Systems, Inc.

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################