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<p>FYI: the hall is going to restricted access this morning, there
is an opportunity to access the system regarding the outstanding
SVT requests. Thank you<br>
</p>
<br>
<div class="moz-cite-prefix">On 2/5/18 4:47 PM, Yuri Gotra wrote:<br>
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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>
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<div class="moz-cite-prefix">On 2/5/18 3:43 PM, Peter Bonneau
wrote:<br>
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<p>See attached DSG response.</p>
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<div class="moz-cite-prefix">On 2/3/2018 10:34 AM, Yuri Gotra
wrote:<br>
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<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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