YSI YSI 556 MPS, Set-Up, Operation & Calibration

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Long Term Storage
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pH and Combination pH/ORP Sensor
– The key to sensor storage is to make certain that the reference electrode junction
does not dry out. Junctions which have been allowed to dry out due to improper
storage procedures can usually be rehydrated by soaking the sensor for several
hours (overnight is recommended) in a solution which is 2 molar in potassium
chloride. If potassium chloride solution is not available, soaking the sensor in tap
water or commercial pH buffers may restore sensor function. However in some
cases the sensor may have been irreparably damaged by the dehydration and
will require replacement.
–
CAUTION: Do not store the sensor in distilled or deionized water as the glass
sensor may be damaged by exposure to this medium.
•
Remove the pH or pH/ORP sensor from the probe module.
•
Seal the empty port with the provided port plug.
•
Place the sensor in the storage vessel (plastic boot or bottle) which was on the
sensor at delivery. The vessel should contain a solution which is 2 molar in
potassium chloride.