[Hallb-solenoid] P027 Interlock checks and remaining check sheets
Pablo Campero
campero at jlab.org
Mon Oct 3 13:12:15 EDT 2016
Hello Ruben,
We spoke to Nick in the hall regarding some questions we had about the interlock checkout procedure. Additional questions and comments we have are:
1. We were informed that for task named “Test Hardware Interlock System Cable Interlock” that the cables that need to be disconnected to trip the interlock are on the torus coil. We do not have man lift training and cannot complete this task on our own. Is there anyone in the Magnet Group that can help with this test.
2. While in the hall, we talked to Probir about an issue with the Quench Detector Sum interlocks. We figured out that for this interlock, it is wired backwards. It is wired in a way where it fails when it should be in a safe state. Probir mentioned that someone will be in the hall to fix the wiring this afternoon This wiring would need to be fixed so we can continue the tests. When would the changes be done to the wiring to allow the interlock tests?
3. There are several cryo PLC Controlled Ramp down interlocks that are tripped. We had to bypass these interlocks in the PLC software to clear the interlock. Once the cryo issues are resolved, we will be able to remove the bypass. Will the change to an EV valve as discussed in email resolve this issue?
In order to complete the test so that the interlock system will be fully tested and will ensure the torus is ready to be powered, the above issues will need to be resolved. We will continue to look at the procedure to help the tests go as smooth as possible and the above issues are resolved.
With Regards
Pablo Campero
Detector Support Group
From: "Ruben Fair" <rfair at jlab.org>
To: "Nick Sandoval" <sandoval at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>, "Tyler Lemon" <tlemon at jlab.org>
Cc: "Cesar Luongo" <luongo at jlab.org>
Sent: Monday, October 3, 2016 12:33:41 PM
Subject: P027 Interlock checks and remaining check sheets
Guys,
Apologies for the pressure but Glenn, Leigh and Allison keep asking when all the checklists (including the interlocks) will be completed. They are pushing to power up the magnet tomorrow.
Ruben
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