YSI ProDSS - Manual (Page 62)

60
Maintenance and storage
Figure 67 ODO rehydration
ODO sensor rehydration
To prevent sensor drift, always store the ODO sensor in a wet or
water-saturated air environment. If the ODO sensor has accidentally
been left dry for longer than 8 hours, it must be rehydrated.
If rehydration is necessary, soak the ODO sensor cap in warm (room
temperature) tap water for approximately 24 hours. After the soak,
calibrate the sensor (
Figure 67 ).
Figure 68 ODO short-term storage
ODO sensor short-term storage (less than 4 weeks)
When in regular field use, the ODO sensor should remain installed on
the bulkhead. Place approximately 0.5 in (1 cm) of any water (tap or
environmental) in the calibration cup (
Figure 68 ).
Install the calibration cup onto the bulkhead and firmly tighten to prevent
evaporation.
Figure 69 ODO long-term storage
ODO sensor long-term storage
The ODO sensor can be left on the bulkhead or removed for long-term
storage (
Figure 69 ).
Installed on bulkhead
Fill the calibration cup with clean water (use distilled or deionized water if
a pH sensor is not installed). Submerge the sensor in the calibration cup
then firmly tighten to prevent evaporation.
Removed from bulkhead
Remove the sensor from the bulkhead ( Sensor removal on page 10 ).
Method 1 : Cover the sensor connector end with the plastic storage
cap. Submerge the sensing end of the sensor in a container
of clean water (use distilled or deionized water if a pH
sensor is not installed). Periodically check the level of the
water to make sure that it does not evaporate.
Method 2: Wet the sponge located in the cap originally included with
the ODO sensor, then install on sensing end of the ODO
sensor. Replace the sponge if it becomes dirty.