Crossfire CO2 controller help

[Purely Natural]

hello, I’m looking for the instruction manual or if someone knows how to calibrate this controller.
Manufacturer website no longer exists
Crossfirecontrols.com
Thanks

 

[Renfro]

Just plug it in outside away from anything that emits CO2. If it reads 360 - 400 then it's pretty good to go.

 

[Purely Natural]

Just plug it in outside away from anything that emits CO2. If it reads 360 - 400 then it's pretty good to go.

That’s the issue it’s reading 770 on sensor 1 and 778 on sensor 2.
It’s a 2 sensor controller.

 

[Renfro]

Well the fact that both sensors are very close in reading makes me think its accurate, are you positive that reading isn't correct? Was it outdoors? Are you in a big city where CO2 levels are higher?

 

[Renfro]

You could always use one of those cheap co2 syringe test kits to see if it's reading the same or close.

 

[Purely Natural]

Well the fact that both sensors are very close in reading makes me think its accurate, are you positive that reading isn't correct? Was it outdoors? Are you in a big city where CO2 levels are higher?

I plugged it outside next to wooded park away from any traffic. I’m pretty sure it’s not 770.
Thanks

 

[Renfro]

I plugged it outside next to wooded park away from any traffic. I’m pretty sure it’s not 770.
Thanks

It could very well be that high outside. Seen it myself. Personally I think the unit is working well and if it was mine I would just use it as is.

 

[xtsho]

It has a menu button. It shouldn't be too difficult to cycle through the menu to get it into calibration mode.