YSI ProDSS - Manual (Page 66)

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Maintenance and storage
Figure 75 ISE short-term storage
ISE sensor short-term storage (less than 4 weeks)
When in regular field use, the ISE sensors should remain installed on the
bulkhead in an environment of water-saturated air. Place approximately
0.5 in (1 cm) of any water (deionized, distilled or environmental) in the
calibration cup (
Figure 75 ).
Install the calibration cup onto the bulkhead and firmly tighten to prevent
evaporation.
Figure 76 ISE long-term storage
ISE sensor long-term storage
NOTICE: Do not let the ISE junctions dry out. Junctions that have
been allowed to dry out by improper storage may be
irreparably damaged by dehydration and will require
replacement.
1. Place a small amount of high-calibration solution or tap water in
the storage bottle originally included with the sensor.
2. Remove the sensor from the bulkhead and insert the sensing end
into the shipping bottle.
3. Install the bottle o-ring and tighten ( Figure 76 ).
NOTICE: The sensors should not be immersed in water.
NOTICE: Do not store the ISE sensors in conductivity standard, pH
buffer or salt water.
Rehydrating the reference junction
If an ISE sensor has been allowed to dry, soak the sensor for several
hours (preferably overnight) in the sensor’s high-calibration solution. If
the sensor is irreparably damaged, the sensor module must be replaced.