Hi Bob,

Most likely either the Orings on the plunger driver wheel or the wheel
itself is worn.

I can also be the center bearing is too loose. For that remove the tray and
spin the brass center piece with your fingers. It should come to a smooth
and relatively prompt stop. If it spins freely tighten the hex bolt a little
and try again.






Nick Collins

Elemental MS

12430 N Dowling Rd

College Station
TX 77845

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From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf
Of Michener, Robert H
Sent: Thursday, May 12, 2016 9:29 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] Eurovector solid autosampler issue


Hi all,


I've got a problem with our Eurovector solid autosampler.  Basically, it's
dropping 2 samples at once and it occurs twice during an overnight run.
It's happening roughly at the same spot in the carousel.  I have the metal
carousels and it seems to happen on both the bottom and top trays.  I've
looked at the obvious:  cleaned the trays, replaced the ratchet gear, and
cleaned the piston.  I have a brand new motor as well.  It's been
frustrating, especially when I have to go into the spreadsheet and fix the
sample order.not to mention lost samples.


Any suggestions would be appreciated!







Robert Michener

IRMS Laboratory Manager

Boston University Stable Isotope Laboratory

Department of Biology

5 Cummington Mall

Boston, MA  02215


Voice: 617-353-6980

Fax: 617-353-6340

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