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wsular / urbanova-aqnet-rpi-node-school

This repository contains code and notes related to the sensor packages developed for WSU Urbanova Air Quality Network (aqnet). This particular repository is for sensors that are used as part of the Ramboll project at schools in the Spokane School District.
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Which data variables from the PMS5003 do we want to store? #7

Closed vonw closed 5 years ago

vonw commented 5 years ago

Matthew, we need to figure out what the actual units of the EBAM data are. This will then allow us to figure out what data we need to save from the PMS5003 sensors for comparison.

matthewRoetcisoender commented 5 years ago

ok, I'll take a look

matthewRoetcisoender commented 5 years ago

The concentration units of the EBAM are ug/m3

vonw commented 5 years ago

1) And these are 1-hour averages, correct?

2) So what variables from the PMS5003 should we save?

matthewRoetcisoender commented 5 years ago

1) Yep, 1 hour

2) I think it is actually going to be the "pm10_standard","pm25_standard", and "pm100_standard" (for PM1 PM2.5 andPM10) as it looks like those are the mass concentration data ( I think right now the number of particles is what is being recorded). Although I think the EBAM only does PM2.5 and PM10? so should the PM1 be included for the PMS5003?

vonw commented 5 years ago

Yes. So I would continue to save everything that we already are storing ("particles..."), but then add the pm10_standard, pm25_standard and pm1000_standard data. Let's rename these: PM1_standard, PM2_5_standard, and PM10_standard.

Does that seem reasonable?

matthewRoetcisoender commented 5 years ago

ok, sounds good. Also, do you know what the "PM10_env" is referencing off the top of your head. According to the PMS5003 manual its "Data4 refers to PM1.0 concentration unit * μ g/m3(under atmospheric environment)". I'm just not sure if "under atmospheric environment is a typical term or something that is used. (ie should we use that instead of the "standard" PM data

vonw commented 5 years ago

Are there "env" variables for PM1, PM2.5 and PM10?

I'm not sure what these are. Can you compare them to the "standard values" using your data from the prototype instrument?

matthewRoetcisoender commented 5 years ago

yes, there are "env" variables for those three, but it has always been commented out...I'll leave the sensor running overnight and check tomorrow to see if there is any difference

vonw commented 5 years ago

Hmm... I'll bet we want the "env" variables. I'll bet you look at the manual (http://www.aqmd.gov/docs/default-source/aq-spec/resources-page/plantower-pms5003-manual_v2-3.pdf); see the phrase "Note: CF=1 should be used in the factory environment", which applies to the "standard" values. This seems like some sort of factory calibration value...

In any case, let's see how they differ overnight. Keep me posted.

vonw commented 5 years ago

This was completed back in early August 2019. Closing this issue now.