YSI YSI 556 MPS, Set-Up, Operation & Calibration

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Dissolved Oxygen
•
It is possible for the silver anode, which is the entire silver body of the sensor, to
become contaminated. This will prevent successful calibration.
•
For correct sensor operation, the gold cathode must always be bright. If it is
tarnished (which can result from contact with certain gases), or plated with silver
(which can result from extended use with a loose or wrinkled membrane), the gold
surface must be restored.
•
To keep the electrolyte from drying out, store the sensor in the transport/calibration
cup with at least 1/8

of water.