[dsg-svt] SVT HFCB temp R3S1T/B

[Brian Eng]

The R3 HFCB temp problems are at the HFCB end of the cable. I got it working last time when the MVT was removed by moving around the cable at that end. It was reading normally until the MVT was reinstalled.

We can either re-terminate the cable or replace it when the SVT is removed for repairs next summer.

> On Aug 9, 2018, at 8:53 AM, Yuri Gotra <gotra at jlab.org> wrote:
> 
> These readings have been unstable or failing completely for the past months. I asked Brian to look into it. He fixed the issue several times when there was direct wire connection to the patch panel blocks. Now there are connectors but the problem is still there.
> There is also a failing reading Humidity SB3.
> 
> Yesterday there were 2 SVT trips. I disabled the coolant pressure interlock in the evening, no trips overnight. Enabled it again. A log with interlock trip time stamps would be very helpful to debug the trips.
> 
> On 8/9/18 8:20 AM, Peter Bonneau wrote:
>> R3S1T & R3S1B temperature sensor readings are unstable and has increased over the last hour from nominal (~-4.9C) to 25 - 30C.  
>> Low voltage/current readback for R3S1T/B is normal.
>> All other HFCB temperatures are normal.