If it still doesn’t work then please send me a message through our support form on our website and we can arrange a trouble shooting call.
No point, as I can’t use zoom anyway… I’ll just have Terry put the second PM sensor back in so I can get my data back, and I’ll wait until I get the new one I ordered this morning…
Thanks @Achim_AirGradient . I’ve put meter outside and requested calibration. It correctly shows values around 400 ppm.