[Esr-users] [Revised Logentry] Follow-up Re: Hall B Torus and DBX Nitrogen System

[kashy at jlab.org]

Logentry Text:
--
The frequency of the Batch fills of Hall B LN2 is ~16-18hrs. AS seen in the first plot LL8554CP. After turning the heater min to 0 it has stayed off even though the primary control is active (pressure in the reservoir has remained above the 1.1 atm setpoint). It does look like the flow to Hall C is a oscillating more. (CFI6751C).

I am trying some fine tuning of the liquid supply valve EV8553 and its min/max loops to see if I can smooth out the oscillations and reduce the batch fill effects, but with a 16 hr period it could take a day or two to know if it helps or makes things worse. 

There was an early sign that a small effect can be seen. I made a change to the EV8553_min loop at 7:55 and the peak to peak change locally of Hall C LN2 flow (CFI6751C) reduced. See plot 2

---

This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3825628
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/esr-users/attachments/20200812/9c45c642/attachment.html>