[Dsg-hallb_magnets] EV8611CD and EV861JT - issues

[Pablo Campero]

Hello Scot, 

I will be in the hall tomorrow at 9:00 AM to do the LVDT's calibration. 
I'll see you there. 

Best Regards, 
Pablo 


From: "Scot Spiegel" <spiegel at jlab.org> 
To: "Pablo Campero" <campero at jlab.org> 
Cc: "Wesley Moore" <wmoore at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org> 
Sent: Tuesday, July 25, 2017 2:51:43 PM 
Subject: Fwd: EV8611CD and EV861JT - issues 

Pablo, 

Let me know what time you will be in Hall B tomorrow. 

We can verify and address the function issues of the JTV drive controls and re-calibrate the LVDT's if necessary. 

Scot Spiegel 
Sr. Technologist / Designer 
Physics / Hall D 
JSA Jefferson Lab 
12000 Jefferson Ave. 
Bldg. 55 Rm. 1546-24 
Newport News, VA. 23606 
Ph. 757-536-5900 
Wk. 757-269-5900 


From: "Nicholas Sandoval" <sandoval at jlab.org> 
To: "Scot Spiegel" <spiegel at jlab.org> 
Sent: Tuesday, July 25, 2017 1:45:47 PM 
Subject: Fwd: EV8611CD and EV861JT - issues 

----- Forwarded Message ----- 
From: "Ruben Fair" <rfair at jlab.org> 
To: "Pablo Campero Rojas" <campero at jlab.org>, "Nicholas Sandoval" <sandoval at jlab.org>, "Scot Spiegel" <spiegel at jlab.org>, "Wesley Moore" <wmoore at jlab.org> 
Sent: Thursday, July 20, 2017 9:01:25 AM 
Subject: EV8611CD and EV861JT - issues 

Pablo, 

Can you please start a log of issues as we start to commission of I and C sub-systems? 

Gentlemen, 

First issues noted today during the leak test and pressure test: 

1. EV8611CD was reading -5% on EPICS suggesting it was closed. However visual inspection of the valve stem suggested that perhaps it was not fully closed. Cycling it a few times seems to have resolved the problem. Could you check that all is well, particularly with the LVDT calibration? 

2. EV8611JT. 
The EPICS symbol did not turn red on valve closure. If it displayed a large negative number (e.g. -1.17%), then the symbol turned red, otherwise, if it displayed just -0.5%, it remained green. 

Could all the other valves be behaving this way too? 

Regards 

Ruben 

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