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

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Install DO Membrane
A new membrane cap must be installed before the first
use .
• Unscrew and remove the probe sensor guard.
• Unscrew, remove, and discard the old membrane cap.
• Thoroughly rinse the sensor tip with distilled water.
• Prepare the electrolyte according to the directions on the
electrolyte solution bottle.
• Hold the new membrane cap and fill it at least 1/2 full with the
electrolyte solution.
• Screw the membrane cap onto the sensor moderately tight. A
small amount of electrolyte should overflow.