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Ref. No. [UMCES] CBL 2016-011

ACT VS16-02

15

The precision of the PME miniDOT sensor was also characterized for each of the nine

temperatures and salinity trials (Table 3). Precision trials were conducted at the start of each new

tank test when conditions were most stable. Instruments were equilibrated in test tanks at indicated

temperature and salinities for 45 min then the subsequent 31 one-minute measurements were used

to estimate average tank DO (mg/L) and its variation over that interval. The absolute precision,

estimated as the standard deviation (s.d.) around the mean, ranged from 0.005 – 0.013 mg/L across

trials with an overall average of 0.008 mg/L. Relative precision, estimated as the coefficient of

variation (CV% = (s.d./mean)x100), ranged from 0.057 – 0.248 percent across trials with an

overall average of 0.098%.

Table 3.

Characterization of the precision of the PME miniDOT sensor over a range of temperatures and

salinities test conditions.

Trial ID

Temperature

Salinity

Dissolved Oxygen Reading

mg/L mean

mg/L s.d.

CV%

n

L_T15_S00

15.44

0.00

9.16

0.013

0.137

31

L_T15_S10

15.47

8.82

9.16

0.006

0.063

31

L_T15_S35

15.39

34.20

8.15

0.006

0.076

31

L_T04_S00

5.40

0.00

11.88

0.008

0.070

31

L_T04_S10

5.30

8.98

11.59

0.008

0.068

31

L_T04_S35

5.23

34.77

10.13

0.006

0.057

31

L_T30_S00

30.22

0.00

4.95

0.012

0.248

31

L_T30_S10

30.51

9.28

6.99

0.006

0.085

31

L_T30_S35

30.61

34.43

5.92

0.005

0.080

31