[Dsg-rich] humidity sensor calibration

[Tyler Lemon]

Hello Marco, 

We would be available to meet this morning at 10:00AM. 

So DSG can prepare for the meeting, what issue is there with the readings during the time interval in your logbook entry from 2017-11-25 from 14:00 to 18:00? 

Taking the data for that time interval, we wrote a Python script that parses the data every 10 seconds and calculates the maximum difference between humidity readings (1440 data points total). The resulting plot (2017-11-25_1400_to 1800.jpeg) is attached. From the data, the largest difference is 1.22% and the average difference is 0.75% +/- 0.22%. This is within the specs of the sensor. 

If the issue is the fluctuations in humidity readings in the middle of the plot, that seems to be a result of whatever programming the drybox uses to reach a specified humidity. It is not from the humidity sensors. 

Best regards, 
Tyler 


From: "Mirazita Marco" <Marco.Mirazita at lnf.infn.it> 
To: "dsg-rich" <dsg-rich at jlab.org> 
Sent: Tuesday, November 28, 2017 11:15:00 AM 
Subject: [Dsg-rich] humidity sensor calibration 

Hi all, 
I would have a meeting to discuss the calibration of the humidity 
sensors at values below 10%. 
The data I took few days ago can be found here: 
https://logbooks.jlab.org/entry/3496207 
When would you be available? 
Thank you, 
Marco 

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