From dwnam at stanford.edu  Fri Aug 19 22:22:32 2011
From: dwnam at stanford.edu (Donguk Nam)
Date: Fri, 19 Aug 2011 22:22:32 -0700
Subject: Does anyone know what to do when SEC vaccum does not reach HIGH?
Message-ID: <CAE+Tuho7A8WpuB-bs2Sb-s9zat2doXDEyDKKZoi36hnNkqoVxQ@mail.gmail.com>

Hi all,

I am trying to use SEM4160 and SEC vaccum does not go to HIGH state.
As the instruction says, I have wiped O-ring in case of leaking but it is
still not pumping down after 10,20min.

Does this happen to anyone and let me know what to do?

Thanks,
Donguk
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From grahamab at snf.stanford.edu  Sat Aug 20 11:01:21 2011
From: grahamab at snf.stanford.edu (Andrew Graham)
Date: Sat, 20 Aug 2011 11:01:21 -0700
Subject: Does anyone know what to do when SEC vaccum does not reach HIGH?
In-Reply-To: <CAE+Tuho7A8WpuB-bs2Sb-s9zat2doXDEyDKKZoi36hnNkqoVxQ@mail.gmail.com>
References: <CAE+Tuho7A8WpuB-bs2Sb-s9zat2doXDEyDKKZoi36hnNkqoVxQ@mail.gmail.com>
Message-ID: <CAFF=XsJHiuw97KMsNHGmjx=tt1hELB2J4TzpMJ=7hus+fh0pBQ@mail.gmail.com>

Hi Donguk,

I found the paper backside of one of the carbon sticky dots stuck to the
O-ring on the part underneath the stage.  Once I removed it, it pumped down
just fine.

This should be a good reminder to all users as to why it's important to
clean up any mess you might make (I found about 6 of those paper dots on top
of the SEC).  It can and (based on Donguk's experience) does get in the way
of other users ability to use equipment.

Happy SEM'ing everyone,

Andrew

On Fri, Aug 19, 2011 at 10:22 PM, Donguk Nam <dwnam at stanford.edu> wrote:

> Hi all,
>
> I am trying to use SEM4160 and SEC vaccum does not go to HIGH state.
> As the instruction says, I have wiped O-ring in case of leaking but it is
> still not pumping down after 10,20min.
>
> Does this happen to anyone and let me know what to do?
>
> Thanks,
> Donguk
>
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