YSI 600DW-B Sonde - Manual (Page 14)

Sondes Section 2
Apply a few drops of KCl solution to the tip of the probe as shown in the picture above right. The fluid
should completely fill the small moat around the electrodes and form a meniscus on the tip of the sensor.
Remove a white membrane sheet from the package in the 6573 membrane kit as shown in the picture
below.
CAUTION: The blue sheets are simply protective spacers and CANNOT be used as
membranes for the free chlorine sensor.
Meniscus
O-Ring in Groove
White Membrane
As shown in the pictures below, lay the membrane on the probe tip that contains the electrolyte so that the
probe tip is approximately in the middle of the membrane.
YSI Incorporated Drinking Water Monitoring Systems Operations Manual 2-7