Quote: (Originally Posted by
Scubydoo)
You don't seem to have measured the atmospheric pressure. The output of the cell will be higher on a high pressure day, compared to a low pressure day. The fact that your cells are dropping is most likely an indicator that the atmospheric pressure is dropping. Cells measure oxygen pressure. PO2 = O2% x pressure ( even at the surface)
I agree about the atmospheric pressure and the mv readings. The readings do not always drop, sometimes they raise.
It is about the amount of change in readings from one time to the next
AND compared to the amount of change in the readings from the others cells also.
cell 1 changed by 2mv
cell 2 changed by 1mv
cell 3 changed by 6mv
Now is the time to begin suspecting cell 3
MAY be on the verge of failing.