YSI 6 series User Manual page 12

Sondes
DO MEMBRANE INSTALLATION WITH THE PROBE NOT INSTALLED IN THE
SONDE
Remove the protective cap and the dry membrane from the YSI 6562 Dissolved Oxygen probe.
Make sure that the protective cap is installed on the connector end of the probe. Do not allow the
electrolyte solution to wet the probe‟s connector and O-ring seal areas. This solution is extremely corrosive
to the connector and is difficult to remove.
Before using any electrolyte, wrap a clean, dry paper towel around the capped probe to catch any spilled
electrolyte. Hold the probe in a vertical position and apply a few drops of KCl solution to the tip. The fluid
should completely fill the small moat around the electrodes and form a meniscus on the tip of the sensor.
Be sure no air bubbles are stuck to the face of the sensor. If necessary, shake off the electrolyte and start
over.
Secure a membrane between your left thumb and the probe body.
Always handle the membrane with care, touching it only at the
ends.
With the thumb and forefinger of your right hand, grasp the free
end of the membrane. With one continuous motion, gently stretch
it up, over, and down the other side of the sensor. The membrane
should conform to the face of the sensor.
Secure the end of the membrane under the forefinger of your left
hand.
Roll the O-ring over the end of the probe, being careful not to
touch the membrane surface with your fingers. There should be no
wrinkles or trapped air bubbles. Small wrinkles may be removed
by lightly tugging on the edges of the membrane. If bubbles are
present, remove the membrane and repeat steps 3-8.
Trim off any excess membrane with a sharp knife or scissors.
Rinse off any excess KCl solution, but be careful not to get any
water in the connector.
If you are concerned that electrolyte may have dripped onto the O-
ring seal area, probe connector, or bulkhead connectors, rub the
area clean with paper towels wetted with Deionized water and then
dry the affected area with a final dry towel, compressed air blasts,
or rinse with fresh alcohol.
NOTE: You may find it more convenient to mount the probe vertically in a vise with rubber jaws while
applying the electrolyte and membrane to the sensor tip.
YSI Incorporated Environmental Monitoring Systems Operations Manual
Figure 7
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Section 2
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