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avatar: FN123
FN123
5 posts
Replied to FN123's post on March 19th, 2018

CO2 level in the screen shows 5%, but when I read the CO2 levels with an external device it shows 9% (Temperature 37 C and 100 % Humidity), I recalibrate, however, the CO2 level is still above 5%. Should I change the CO2 sensor?  

avatar: floyd
floyd
70 posts
Replied to FN123's post on March 19th, 2018
It can also be the valve or the controls. The sensor is the easiest to change so start there
avatar: FN123
FN123
5 posts
Replied to FN123's post on March 20th, 2018

Thank you!!!!

avatar: medphysteo
medphysteo
287 posts
Replied to FN123's post on March 20th, 2018

Before you start replacing parts, make sure the chamber fan is turning freely. Any time you have discrepancies between internal and displayed temperature or CO2 readings in Forma incubators, 99.9% of the time the fan has stalled or is slowing down due to bearings seizing. The environment sensors are mounted in the chamber ceiling shroud in line with the fan blower outlet, and without proper airflow past them they will not read accurately. Unless someone went into Settings and started jacking around.

avatar: NormW
NormW
26 posts
Replied to FN123's post on March 20th, 2018

Yes I Agree. 95% of the time my issue is solved by replacing a bad fan motor.

avatar: FN123
FN123
5 posts
Replied to FN123's post on March 21st, 2018

Hello All,

Thank you for replying, actually I check the blower and it is working perfectly, so it seems that the sensor is the one because it is reading 3% even the incubators has not CO2 in it.

avatar: medphysteo
medphysteo
287 posts
Replied to FN123's post on March 21st, 2018

Did you calibrate the zero point before you tried calibrating at 5%.

avatar: FN123
FN123
5 posts
Replied to FN123's post on March 21st, 2018

Yes, but still going up to 9 %

avatar: benhadad
benhadad
3 posts
Replied to FN123's post on September 28th, 2018

Does the sensor have any residual built up on it?