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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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</pre>
</blockquote>
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