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<p>Hi Bob,</p>
<p>I dropped off two MFCs (500 sccm (supply) and 1000 slm (exhaust))
at the gas shed this morning, with cables and a controller which
is already set up on Ch. 7 and 8 to flow DC mix gas. Ch. 7 should
be used for the supply flow (set to flow 133.3 sccm) . Ch.8 (set
to flow 1 lpm) should be used for the exhaust flow measurement, in
lieu of a MFM. <br>
</p>
<p>To start gas flow, you must select the Extended Display menu and
scroll to the left (directional pad) until you reach the channel
status of the channel you want to control and then toggle up or
down (directional pad) to change the status to off or on. <b>The
right directional arrow does not work</b>. Alternatively, you
can use the All and On/Off buttons, as well. <br>
</p>
<p>Gas flow can be viewed in the user display menu. The MFCs have
already been zeroed and each channel has the Gas Correction Factor
for the mixture. Here is a link to the manual, pages 11-12 has the
information on operating the controller. <br>
</p>
<p>Let me know if you have any questions,</p>
<p>-Marc<br>
</p>
<div class="moz-cite-prefix">On 10/23/2018 9:09 AM, Marc McMullen
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:9db08f75-e792-1166-4d1a-6ef2f21734b4@jlab.org">Bob,
<br>
<br>
We do not have any MFM, there may be some in the gas shed from the
CLAS 6 period. They would be the old MKS, and need the MKS-647
control box (also in the gas shed). MVT does has a spare GE50a
500sccm MFC. The control range is 2 to 100% full scale, so it
should be able to measure in the required range. How long would
they do they need it?
<br>
<br>
-Marc
<br>
<br>
On 10/23/2018 8:11 AM, Robert Miller wrote:
<br>
<blockquote type="cite">Hi Marc,
<br>
<br>
Do we have any flow meters that I can use for an MVT test? I
need to measure ~ 8 liters per hour. The model that they are
using is a SLA5860S; see attached.
<br>
<br>
They are getting flow fluctuations due to wind gusts on their
gas exhaust that trips off the detector.
<br>
<br>
Thanks,
<br>
Bob
<br>
</blockquote>
<br>
</blockquote>
<pre class="moz-signature" cols="72">--
Marc McMullen
Detector Support Group
757-269-7738</pre>
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