YSI 6000UPG - Manual (Page 164)

G-6
ORP
Long Term Storage: ORP is not available on the Model 600. For the Model 6000 UPG , 600XL,
and 6820 systems, the recommended long term storage protocol is identical. Remove the probe
from the sonde and seal the vacant port with the provided plug. Place the probe in the storage
vessel (plastic boot or bottle) which was in place on delivery. The vessel should contain a solution
which is 2 molar in potassium chloride. Make certain that the vessel is sealed to prevent
evaporation of the storage solution.
AMMONIUM AND NITRATE
The active element in these ion selective electrode sensors is a polyvinyl chloride (PVC)
membrane which is impregnated with the reagent which provides specificity for either ammonium
or nitrate. The useful life of this sensor can be reduced if the membrane is stored immersed in
water. Thus, storage in dry air is recommended for long term storage. While dry air is slightly
preferable for general storage, the short term storage of these sensors in the sonde, with the entire
sensor array in moist air, will have no significant detrimental effect on the life of the membrane.
Remove the sensor module (6820) or the probe (6000
UPG ) from the sonde and cover the vacant
port with the provided plug. Place the sensor back in the storage boot which was provided, and
set aside in room air.
TURBIDITY
No special precautions are necessary for either the short or long term storage of the turbidity
sensors for the Models 6000
UPG and 6820. However, for long term storage, the user may wish to
remove the sensor from the sonde and store it dry in air to minimize any cosmetic degradation of
the probe body and to maximize the life of the wiper on the 6026.
DEPTH/LEVEL
No special precautions are required. Sensors can be stored dry or wet, as long as solutions in
contact with the strain gauge sensor port are not corrosive (for example, chlorine bleach).
Recommendations are identical for short-term and long-term storage.