YSI 556 MPS - Manual (Page 30)

Probe Module Section 3
YSI 556 MPS YSI Incorporated Page 24
3.4.3 Membrane Cap Installation
NOTE: The YSI 5563 DO sensor (already installed in the probe module)
was shipped dry. A shipping membrane was installed to protect the
electrode. A new membrane cap must be installed before the first use.
1. Unscrew and remove the probe sensor guard.
2. Unscrew, remove, and discard the old membrane cap.
3. Thoroughly rinse the sensor tip with distilled water.
4. Prepare the electrolyte according to the directions on the
electrolyte solution bottle.
5. Hold the new membrane cap and fill it at least ½ full with the
electrolyte solution.
6. Screw the membrane cap onto the sensor moderately tight. A
small amount of electrolyte should overflow.
Caution: Do not touch the membrane surface.
7. Screw the probe sensor guard on moderately tight.
3.5 Transport/Calibration Cup
The YSI 5563 Probe module has been supplied with a convenient
transport/calibration cup. This cup is an ideal container for calibration of the
different sensors, minimizing the amount of solution needed. Refer to
Section 6 Calibrate.