Grove Multichannel gas sensor v2 calibration

Hello again.

So I eventually bought the sensor.

I have waited 3 days for the sensor to reach equilibrium, but I’m getting very strange readings still.

From the sensor software demo_terminal I obtain the following values:

GM102B: 675 eq 2.18V
GM302B: 163 eq 0.53V
GM502B: 173 eq 0.56V
GM702B: 63 eq 0.20V

What is this voltage number that the program outputs? I need to know how it correlates with the calibration plots from the wiki…the ppm numbers are too high!

Thanks.