Andrea,

Is it just one of the pumps that turns off or do all of them turn off
together.

If it's just one than I would look at the heater connections for that
pump, if it's the main and waste pumps then maybe the solid state relay
or it's control is suspect.  However if it's all the pumps then perhaps
the water trip is suspect even though the water flow is fine (check the
temperature of the pumps to see if they heat up before turning off).

Cheers

Peter Stow

Andrea Lini wrote:
>
> I have very annoying problem with the diff pump on my VG SIRA II, it
> keeps turning off and on by itself with no apparent reason (backing
> pressure and cooling water are fine).
> Can anybody help please?
> Thanks!
>
> Andrea
>
> ==================================================
> |    Dr. Andrea Lini                    |  Stable Isotope Laboratory      |
> |    Department of Geology              |  Phone: (802) 656 02 45      |
> |    University of Vermont              |  Fax:   (802) 656 00 45        |
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> | ISOGEOCHEM URL: http://geology.uvm.edu/geowww/isogeochem.html |
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