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Ref. No. [UMCES] CBL 2016-010
ACT VS16-01
41
Figure X
. Functional sensor response time for the JFE AroW-USB (sn 0181).
Top Panel
: Time series of 10s reads of
instruments during transfers between adjacent high and low DO water baths, maintained commonly at 15
o
C. Indicated DO
levels were maintained by air stone bubblers (high DO) or air+N2 (low DO) and verified by Winkler assays.
Bottom
Panels
: All high DO to low DO transitions were normalized to last reading before condition switch for the indicated post
transition time. Data was fit with a 3 parameter exponential decay function: DO
rel
= DO
relMin
+ a
e
-bt
and indicated
τ
calculated from fit. Data for low DO to high DO transitions (
lower right
) were treated similarly but normalized to
steady state value in subsequent high DO tank and subsequently fit with an analogous 3 parameter exponential rise
function:
DO
rel
= DO
relMin
+ a(1-
e
-bt
) with indicated
τ being directly calculated from fit.