The blue correlation line indicates a 1% change of calibration for every
~2.5mg of accumulated ice. This translates into ~500 volar forearm
TEWL measurements at 10g/(sq.m h).
In practice, you need to keep an eye on the Ice
Monitor of the AquaFlux software. You normally leave the instrument running all day and get rid of the
ice when the job is done. Before going home, you switch the instrument
to stand-by mode and allow the ice to melt and the water to evaporate
If you do a lot of high-flux measurements, then you may need to stop
for ~10 minutes to get rid of the ice. Switch to stand-by mode for
a few seconds while you dab off the melt-water on the condenser using
one of the fibre-free cleanroom swabs supplied with the instrument.
When done, switch back on, close the measurement orifice and wait for
the baseline to settle.