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Maintenance and Storage
Figure 79 ISE short-term storage
Figure 80 ISE long-term storage
70
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
79).
Install the calibration cup onto the bulkhead and firmly tighten to prevent
evaporation.
ISE Sensor Short-Term Storage (Less Than 4 Weeks)
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
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.
(Figure
80).
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