Dear Per-Ingvar and others,
I have also experienced more valve block failures on our Procise =
instruments than on previous models (476 and 470's) I've also noticed th=
at =
the construction of the valve blocks have changed. In the older valve =
blocks, the solenoid was anchored to the valve block with 4 hex head cap =
screws. The newer blocks use 2 cap screws at opposing corners. I am not =
stating this is a cause of the frequent failures, but if it hasn't been =
investigated, its a good place to start. =
"If its not broken, don't try and fix it." =
Regards,
Joe Leone
Joseph W Leone
7240-267-119
Pharmacia & Upjohn =
301 Henrietta St
Kalamazoo, MI 49007 USA
Tel: (616) 833-5375
Fax: (616) 833-1488
Email: joseph.w.leone@am.pnu.com
__________
____________________ Reply Separator _________________________________
Subject: Re: DNASyn: Failed valve blocks
Author: pio@panther.cmb.umu.se (Per-Ingvar Ohlsson) at INTERNET
Date: 1/22/1998 10:30 AM
Dear Mark and others,
A Procise 494 was installed in my lab in April 1996. About two months a=
go =
3 valve blocks failed (3,4 and 8 valves) and had to be replaced. Also in=
=
this system reagents and solvents were sucked back to the wacuum-assist =
system, but the "pump" was not damaged.
The old 477A was, compared with this, a very reliable instrument, during=
=
the 10 years it was running there was never any problems with the valve =
blocks.
Regards Per-Ingvar
Per-Ingvar Ohlsson, Dr Med Sci, Department of Medical Biochemistry and =
Biophysics, Ume=E5 University, S-907 87 Ume=E5, Sweden
tel +46 90 166744, fax +46 90 136310, e-mail pio@panther.cmb.umu.se
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Date: Thu, 22 Jan 1998 10:30:48 +0100
Old-To: Mark Lively <lively@mgrp.bgsm.edu>,
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From: pio@panther.cmb.umu.se (Per-Ingvar Ohlsson)
Subject: Re: DNASyn: Failed valve blocks
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