YSI 5239 Dissolved Oxygen Probe - Manual (Page 7)

3
5. Tap the bottom of the membrane cap with your finger a
few times (don’t touch the membrane) to shake loose
any trapped air bubbles.
6. Screw the membrane cap onto the probe moderately
tight. A small amount of electrolyte should overflow.
7. Rinse off the excess electrolyte with clean water.
8. Screw the probe guard onto the probe body.
9. Place the probe in the calibration bottle provided.
Verify that sponge in the bottle is wet.
Figure 1
C ALIBRATION
Dissolved oxygen calibration must be done in an environment
with a known oxygen content. Three such environments will
be discussed here: calibration in air (water-saturated),
calibration in air-saturated water and calibration by Winkler
Screw cap on
moderately tight
Fill membrane cap
with 6-7 drops of
KCl solution.
Tap cap with finger
to remove bubbles.
Unscrew cap
Screw guard on
moderately tight
Unscrew guard