[dsg-svt] FYI: pending SVT support work requests to the DSG

[Yuri Gotra]

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


On 2/5/18 4:47 PM, Yuri Gotra wrote:
>
> 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.
>
>
> On 2/5/18 3:43 PM, Peter Bonneau wrote:
>>
>> See attached DSG response.
>>
>>
>>
>> On 2/3/2018 10:34 AM, Yuri Gotra wrote:
>>> The CLAS engineering run is ending in 2 days. We are approaching the 
>>> start of physics data taking.
>>> Here is the list of SVT support work requested from the DSG which is 
>>> still pending.
>>>
>>> - 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.
>>> - 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.
>>> - Broken hardware interlock on ambient temperature T2. This 
>>> interlock had to be disabled, a detector safety issue.
>>> - 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.
>>> - 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.
>>> - 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.
>>> - 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.
>>> - Installing the nitrogen cooling line temperature monitoring. The 
>>> temperature sensor has been ordered.
>>>
>>> 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.
>>>
>>>
>>> _______________________________________________
>>> dsg-svt mailing list
>>> dsg-svt at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/dsg-svt
>>
>

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