First runtime/endurance tests first humidity test drive.google.com/drive/folder...

A pair of OpenCPC model 100.1 sampling before and after a MERV16 filter on a central air system. The nearly inaccessible back panel of this system (improperly installed ~20 years ago) is the main source of total inward leakage.

1/8” NPT barbs installed in the area immediately downstream and upstream of a filter. When not sampling, the barbs can be capped with silicone covers.

Tap/drill/probe packets for anyone wanting to try this with their CPC.

Fit Test the Furnaces - a pair of OpenCPC model 100.1’s monitor the submicron range of indoor air.

New respirator specimens! Specimen id is unique to each respirator in the box and can tie back to lot number, revision number and filtration info. Three specimens are sent per box. To further reduce bias - either none are tested or all 3 are tested. 50 complimentary probes and nuts. cpcCrashCrew!

June 3, 2024

Well, here it is on youtube youtube.com/shorts/tBa03...

Hmm. The gif doesn’t play 🤔

Thank you to @astrokatie.com for lending your condensing particle counter for @ericbkennedy.bsky.social ‘s community survey!

Notice that Tester_0029 takes it even further, opting to get additional 4cm motion controls despite being able to get more points per test by going to the next model. www.testtheplanet.org/interop-points

Amazingly methodical contributors.

What CPCcrashcrew welcome baskets look like right now

Sending out standard samples to CPCcrashCrew

Bird’s eye view. Wide IQR means either bimodal or needs more samples.

Is anybody good with R Shiny App?

Adversarial Mask Data Central docs.google.com/spreadsheets...

Fun things to do with a CPC

Idea: to mail volunteer testers samples with unique identifiers to streamline the crash testing process, and a sheet with all the results so far in a histogram.

Depends on the respirator, not the sip valve. I haven’t seen sip valves contribute to total inward leakage.