joshk
Contributor
I know this will shock some people but cells that have been moistened in the head for a 3-4 hour dive just don't respond as well as cells that are dry.
As a result, I'll calibrate on the first diving day after a break with dry cells because it's what's available. However, I'll also re-calibrate immediately post dive with normal moist cells. On the second day I find that all three cells will read very consistently with each other - far better than on day 1 with the dry calibration - and with much closer alignment with what is actually in the loop under real world conditions.
I've found this approach helpful as well. It gives me validation at depth, correct surface air outputs, surface O2 outputs, etc. Dry stable cells don't calibrate well since we're using them in a humid pressurized environment.