cootwo not holding oxygen calibration

[mikeny9]

Hello,

My cootwo just started losing its oxygen calibration every time it's powered off. When I turn it back on, it always reads "O2 Cal Expired" and I have to go through the calibration again.

The sensor seems to be reading ok. Is there any way to fix this? Should I replace the sensor?

 

[Ghost Diver #]

The COOTWO o2 sensor has to be calibrated before each use. You can set it to “hold” the calibration for any duration between 1 hour and 48 hours. If it doesn’t hold the cal for the time you set it to then yes, the sensor should be replaced.

 

[mikeny9]

Yeah it turns off after being on for about 2 minutes or so then when I turn it back on I have to recalibrate it. In the past it used to just tell me to replace the sensor, I haven’t seen this behavior before. Makes me wonder if it’s the sensor or something wrong with the unit itself.

 

[Ghost Diver #]

That is weird...I’ve never had that problem, hopefully someone else can give some info.

 

[vovanx]

maybe the battery is dead?

 

[mikeny9]

The battery was dead before this started happening. I charged it to full and then the next time I used it it started happening. The battery indicator shows a full charge.

 

[Ghost Diver #]

I have read of people having problems if the unit was allowed to completely lose its charge. I would contact them.

 

[guruboy]

See if there is an option to set the time.

 

[jgttrey]

I have read of people having problems if the unit was allowed to completely lose its charge. I would contact them.

Good luck contacting them. They are terrible about supporting their customers.

My buddy has one of those and, IIRC, he got a persistent warning like that (on top of many other problems), got nowhere trying to contact them. I believe he swapped out a perfectly good sensor and it went away. It's one headache after another. Utterly unreliable and totally unsupported.

I know some have had decent luck with the Cootwoo, and the CO sensor is a good thing, but the unit is a piece of crap both from a design and build standpoint.

 

[Ghost Diver #]

Well that’s a bummer, I have one, and I use it and havent had any trouble...something to thing about I guess..