I recently got a ppm-3 and immediately noticed that it was not always shutting off the solenoid valve on my co2 tank after the relay point (1600 ppm) had been reached. It just kept going up until about 4,500 ppm until i noticed and restarted it. It goes for about 3-5 hours of correctly shutting off the valve and then eventually it will glitch and keep the valve open.

now i have a seperate issue.

originally the co2 ppm in my room was 900 at base level. outside on my lawn between trees it reads 550. so everything is working properly aside from the shut off issue.

so today i wake up and turn it on to find it reading at 4,400 ppm. it took 3 hours with fans blasting to lower the ppm to 1600 and now its pretty much staying there.

so my question is, how can the co2 ppm of my room change so drastically in 1 day?

it went from 900 normally yesterday to 4,400 today. i re-checked, re-calibrated, same thing. ive even measured different points in the outer room.

someone give me a clue as to what is going on please

---i have checked all the valves with soapy water for leaks
and
--i have shut the co2 tank off completely at its main valve, but still the ppm remains at 1600
criom Reviewed by criom on . CAP PPM-3 problems I recently got a ppm-3 and immediately noticed that it was not always shutting off the solenoid valve on my co2 tank after the relay point (1600 ppm) had been reached. It just kept going up until about 4,500 ppm until i noticed and restarted it. It goes for about 3-5 hours of correctly shutting off the valve and then eventually it will glitch and keep the valve open. now i have a seperate issue. originally the co2 ppm in my room was 900 at base level. outside on my lawn between trees Rating: 5