[Dsg-halla] Replacement schedule of Hall A PLC in Dynapower MPS

[Brian Eng]

Hi Jack,

I'll be tied up with other work for most of April, but I think we can still at least start on preparing to swap the PLCs out.

The first thing we need to do is test and verify that the current PLC does what it's supposed to.

I was thinking that a subset of what Dynapower did would be a good starting point?

https://hallaweb.jlab.org/tech/Detectors/public_html/hall_a/magnets/high_resolution_spectrometers/dipole/dynapower/of_historical_interest_only/dynapower_test_procedure_and_results_original.pdf

So when you (or whoever from Hall A can help with this) are available we can do the first test and come up with a new procedure that would be followed when the upgraded PLC is installed.

--
Brian Eng
Detector Support Group
757-269-6018

> On Apr 5, 2019, at 9:22 AM, Jack Segal <segal at jlab.org> wrote:
>
> Due date is June 1, 2019. Thanks for the nudge! I believe we can begin to actually work on it at any time. The magnets are still cold. Cryo will need a "heads up" whenever we ramp things up and down. It will be best to start on the Left Arm. The Right Dipole is the one with an internal short. If something trips it is more problematic for Cryo. The hall will be in Restricted Access this whole time, except 4-29 through 5/1 to remove the Tritium cell.
> From: Peter Bonneau
> Sent: Friday, April 5, 2019 8:54:43 AM
> To: Jack Segal; dsg-halla at jlab.org
> Subject: Replacement schedule of Hall A PLC in Dynapower MPS
>
> Hi Jack,
>
> What is the due date for the replacement of the PLC in the Dynapower MPS?
>
> Regards,
> Peter
>
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