Xylem YSI ProDSS, Руководство пользователя

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66
Maintenance and Storage
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 71 ).
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 72 ).
Install the calibration cup onto the bulkhead and firmly tighten to prevent
evaporation.
ODO Sensor Long-Term Storage
For ProDSS 4 port cable assemblies, the ODO sensor can be left on the
bulkhead or removed for long-term storage (
Figure 73 ).
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.
Figure 71 ODO rehydration
Figure 72 ODO short-term storage
Figure 73 ODO long-term storage