Performance Verification Statement for the Hach Hydrolab DS5X and HL4 Dissolved Oxygen Sensors

20 / 59

Ref. No. [UMCES] CBL 2016-014
ACT VS16-05
20
Figure F. Response of the Hach HL4 LDO (sn 0431) to changing dissolved oxygen
concentrations at 5.2 oC and S=34.77. Top Panel: Time series of instrument readings and Winkler
reference samples drawn at level of sensor foil in well-mixed test tanks. Bottom Panel:
Corresponding offset between instrument reading and Winkler DO reference sample during
exposure trial. Dotted line represents zero offset from reference. Due to apparent internal power
failure, no data was recorded for this trial.