YSI 6000UPG - Manual (Page 16)

2-6
3. Follow the procedure described below to install a
new membrane on the dissolved oxygen sensor tip.
A. 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.
B. Secure a membrane between your left thumb and
the probe body. Always handle the membrane with
care, touching it at the ends only.
C. 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.
D. Secure the end of the membrane under the
forefinger of your left hand.
E. 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.
F. Trim off any excess membrane with a sharp knife or
scissors. Make sure the stainless steel temperature
sensor is not covered by excess membrane. Being
careful not to get water in the connector, rinse off the
excess KCl solution.
4. Using the hex driver supplied in the 6040
Maintenance Kit, remove the probe guard mounting
screws from the sonde. Set the probe guard aside.
NOTE: Do not remove the two allen screws above the
guard.
A B
C
D
E F
Hex Driver
Probe Guard
Mounting
Screws
Probe
Guard