[dsg-svt] Nitrogen line monitoring/control

[Brian Eng]

The MFC is ready to be installed. Just need to do some code changes when moving it from EEL to the Hall.

We'll need to order something to measure the temperature of the gas, unfortunately I couldn't find anything in stock.

I submitted a PR for an RTD here: https://misportal.jlab.org/reqs/pr/viewPrSignatures.do?prNum=374798

Nathan,

I was planning on using one of the spare channels that already exist/is read-out on the V450s: B_SVT_ENV_TEMP_SPARE1_SL7

I'm not sure if it's easier to rename or make a new PV, but can you make a PV for this (archived with 0.2 C dead-band): B_DET_SVT_GAS_N2_TEMP

> On Jan 23, 2018, at 11:05 AM, Yuri Gotra <gotra at jlab.org> wrote:
> 
> Yesterday a nitrogen cooling setup has been installed. In order to optimize performance of the cooling the following modifications are required. An MFC need to be installed on the line prior to the heat exchanger. Nitrogen temperature monitoring need to be installed after the heat exchanger prior to the split of the lines. These modifications need to be propagated to the CSS interface. Thank you