YSI ADV6600 - Manual (Page 145)

Section 10. Care, Maintenance, and Storage
ADV6600
Y S I
Environmental
Page 135
The key to pH probe storage, short or long-term, is to make certain that the reference electrode
junction does not dry out. Junctions that have been allowed to dry out due to improper storage
procedures can usually be re-hydrated by soaking the sensor for several hours (overnight is
recommended) in a solution of two molar (2M) potassium chloride (KCl). If potassium chloride
solution is not available, soaking the sensor in tap water or commercial pH buffers may restore
probe function. However in some cases the sensor may have been irreparably damaged by the
dehydration and will require replacement. It is also important to remember not to store the pH
sensor in distilled or deionized water as the glass sensor may be damaged by exposure to this
medium.
10-5.7. ISE Probes
The active element in the ammonium and nitrate ion selective electrode (ISE) sensors is a polyvinyl
chloride (PVC) membrane that is impregnated with the reagent that provides specificity for either
ammonium or nitrate. The useful life of the sensor will be reduced if the probe is stored in water.
For long periods of time, storage in dry air is recommended. Remove the probe from the ADV6600
and cover the vacant port with the provided plug. Place the sensor back in the storage boot that was
provided, and set aside in room air.
The chloride ISE sensor utilizes a solid state membrane that provides specificity. For long-term
storage, the module should be removed from the ADV660, wiped clean with moist lens cleaning
tissue, and placed in its storage boot to prevent abrasion.
10-5.8. Optical Probes
No special precautions are necessary for long-term storage of the chlorophyll, rhodamine WT, and
turbidity probes. However, the user may wish to remove the probe from the ADV6600, replace it
with a port plug, and store the probe in dry air to minimize any cosmetic degradation of the probe
body and to maximize the life of the wiper.