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<p>Regarding points 3, 5, and 7, most of the day today the hall was
in restricted access. There was a good opportunity to fix the
reported issues before the RG-A starts.<br>
</p>
<br>
<div class="moz-cite-prefix">On 2/5/18 3:43 PM, Peter Bonneau wrote:<br>
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<blockquote type="cite"
cite="mid:68f76fab-e288-c321-7864-043927ff2c28@jlab.org">
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<p>See attached DSG response.</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 2/3/2018 10:34 AM, Yuri Gotra
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:22fabb86-6180-b11e-1939-f5509d212483@jlab.org">The
CLAS engineering run is ending in 2 days. We are approaching the
start of physics data taking. <br>
Here is the list of SVT support work requested from the DSG
which is still pending. <br>
<br>
- Implementing the SVT hardware safety interlocks control
interface in CSS, the chosen CLAS environment for slow controls
and monitoring. The current LabView version of the interface
requires a dedicated MS Windows pc to check the status,
monitoring the system state, and resetting the latched
interlocks. This pc is not on the CUE management system and
requires manual installation of security patches and system
updates. <br>
- Implementing the hardware interlock alarm logging. Lack of
logging features limits debugging options of the primary reasons
for interlock actions and delays resolving the alarm incidents.
<br>
- Broken hardware interlock on ambient temperature T2. This
interlock had to be disabled, a detector safety issue. <br>
- Failing reading of the inlet coolant temperature in the
hardware interlock. This problem requires correct conversion of
the raw sensor data at negative temperatures to be implemented.
This interlock had to be disabled, a detector safety issue. <br>
- Failing reading of the outlet coolant flow meter. An attempt
to fix it was made, the reading is still incorrect. This reading
provides data to the SVT software and hardware interlocks, a
detector safety issue. <br>
- Installing the leak detection system. The leak sensor is
connected to the hardware interlock but is not yet monitoring
the tube connected to the drain pan, a detector safety issue. <br>
- Fixing bad connection of the hybrid temperature reading for
R3S11B. Several attempts to fix unreliable contact have been
made, the reading is still bad. The corresponding module PS
interlock had to be disabled, a module safety issue. <br>
- Installing the nitrogen cooling line temperature monitoring.
The temperature sensor has been ordered. <br>
<br>
A new request. Anova A40 chiller has issues related to operating
at negative temperatures and was removed from the hall this
week. This chiller is being tested by the engineering group. The
SVT is using one of the Lauda chillers connected to the cold
plate. This chiller has a history of blowing the fuses when it
was operated in the EEL building. The spare Lauda chiller has
208 V plug. In order to minimize the down time of the detector
in case of failure of the main chiller, it is required to
assemble a second relay box connected to the hardware interlock.
The relay box currently in use was designed for 110 V outlet
compatible with A40 and one of the Lauda chillers. <br>
<br>
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