[Dsg-rich] Forward carriage ambient temperature sensors

[Brian Eng]

Hi Valery,

We actually have 2 sensors on L1 of the FC located right next to each other (they're on the same PCB). Those are generally  within ~0.1C of each other, which is the dead-band of the archiver.

Looking at the live data it's probably even less than that.

[cid:474E5845-1329-44F8-9329-B40757D4811A at jlab.org]

On Nov 11, 2019, at 9:29 AM, Valery Kubarovsky <vpk at jlab.org<mailto:vpk at jlab.org>> wrote:

Hi Tyler,
What is the systematic errors for these measurements.?
Do the sensors show the same temp if put them close to each other in space?
Regards,
Valery


From: Dsg-rich <dsg-rich-bounces at jlab.org<mailto:dsg-rich-bounces at jlab.org>> on behalf of Tyler Lemon <tlemon at jlab.org>
Date: Monday, November 11, 2019 at 7:48 AM
To: dsg-rich <dsg-rich at jlab.org>
Subject: Re: [Dsg-rich] Forward carriage ambient temperature sensors

Hello,

The PVs for the forward carriage temperature sensors were added to the archiver last Friday.

>From the archived data over the weekend, the average temperature difference (in degrees Celsius) between L1 and L4 was 0.64 C +/- 0.06 C.

Attached are two plots: one of L1 and L4 temperature, the other the difference between L1 and L4.

Tyler
From: Dsg-rich <dsg-rich-bounces at jlab.org> on behalf of Brian Eng <beng at jlab.org>
Sent: Thursday, October 31, 2019 11:27 AM
To: dsg-rich <dsg-rich at jlab.org>
Subject: Re: [Dsg-rich] Forward carriage ambient temperature sensors

Log entry for the newly added RTDs on FC L1 as the Hall B provided ones aren't particularly fast/accurate.

https://logbooks.jlab.org/entry/3738288

> On Oct 29, 2019, at 1:23 PM, Tyler Lemon <tlemon at jlab.org> wrote:
>
> Hello,
>
> Aaron and I have relocated the FC ambient temperature/humidity sensors to the appropriate level based on their PV names.
>
> The logbook entry below has the details on the new sensor locations.
>
> https://logbooks.jlab.org/entry/3737646
>
> Once some time has elapsed, we'll analyze the temperature data to get a better idea of the temperature at the top vs bottom of the FC.
>
> -Tyler

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