[Dsg-halla_magnets] CLEO

[Steven Lassiter]

Hi Pablo,

 I found the problem with the wiring of the CCR temps.

It is a slight mess - Vendor AET wired the two PT-102 sensors as a four wire and wires the diodes as a two wire at the connector internal to the CCR.

We can get together on Tuesday ( i am available all day) and work out how to re-terminate the wiring on the PLC side for the two cables.

Thank you for your checking of the wiring on the PLC side.

Steven

________________________________
From: Dsg-halla_magnets <dsg-halla_magnets-bounces at jlab.org> on behalf of Pablo Campero Rojas <campero at jlab.org>
Sent: Monday, July 18, 2022 10:08 AM
To: dsg-halla_magnets at jlab.org <dsg-halla_magnets at jlab.org>
Subject: Re: [Dsg-halla_magnets] CLEO

Hello Steven,

Last week I checked the diode sensors wiring from the connector at the CCR to the PLC ADC module and I did not find anything wrong.
I started looking to diode temperature sensor (named TD_He_Mag_Sup) and I noticed a high voltage read-back (measured ~ 6.3 V), which is out of the set/expected voltage range. Based on the Curve-10 for the diodes, the expected voltage at ambient temperature is ~ 0.53 V.
I disconnected the Inst-A connector at the CCR side and I plugged a dummy resistor of 1 KOhms in the connector and measured the voltage in the control rack terminal blocks (measured ~0.01 V). I made sure the excitation current was correct (measured the expected 10uA coming out from the CCS board).

Did you test the diode resistance at ambient temperature before?
Please confirm if the attached specs sheet corresponds to the diode sensors installed inside the CCR?


Today I'm working remotely on the FTView data logging model and making some changes to the Radial & Axial support expert screen.


I will at the lab tomorrow if you're available we can meet and go over these topics.

--Pablo


________________________________
From: Steven Lassiter <lassiter at jlab.org>
Sent: Monday, July 18, 2022 9:09 AM
To: Pablo Campero Rojas <campero at jlab.org>
Subject: CLEO

Hello Pablo,

 Will you be working on CLEO signals any today?
Also, would like to help on setting up and running the CLEO HMI on other computers. Seems I do not have access to some files.

Thanks
Steven
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