[Dsg-rich] [EXTERNAL] meeting with DSG

[Benjamin Raydo]

Hi Brian,

Right, we're monitoring the FPGA internal temp sensor using the XADC.

I don't know what the original question was, but wanted to mention that we have two more temperatures monitored in the external regulators (which was the XADC analog-to-digital converter) - they are in EPICS, but I'm not sure if they are archived.

Also, I would expect it's possible to cross-check or calibrate the temperature sensors if one monitors the temperature as the system turns on - you should be able extrapolate to the box temperature before it was powered and see how well everything agrees.

Ben

From: Brian Eng
Sent: Monday, October 14, 10:17 AM
Subject: Re: [Dsg-rich] [EXTERNAL] meeting with DSG
To: marco mirazita
Cc: dsg-rich at jlab.org


Hi Marco,

Regarding the FPGA temperatures, since we don't have the FPGA code itself we can only make an educated guess, but it's quite  likely that it is using the on-die temperature sensor.

https://www.xilinx.com/support/documentation/user_guides/ug480_7Series_XADC.pdf
(page 14, figure 1-1)

Note that this sensor has an error of +/- 4C when the temp is < 100C

> On Oct 14, 2019, at 3:35 AM, mirazita at jlab.org wrote:
>
>
> marco mirazita has invited you to a meeting.


_______________________________________________
Dsg-rich mailing list
Dsg-rich at jlab.org
https://mailman.jlab.org/mailman/listinfo/dsg-rich


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20191014/734f028e/attachment-0002.html>