YSI 6000UPG - Manual (Page 160)

G-2
The key for interim storage is to use a minimal amount of water so that the air in chamber remains
at 100 percent humidity, but the water level is low enough so that none of the sensors are actually
immersed. Any type of water can be used in this protocol: Distilled, deionized, or tap. If storage
water is inadvertently lost during field sampling studies, environmental water can be used to
provide the humidity.
Thus, interim multiparameter storage is easy. Simply remember the following key points:
❏ Use enough water to provide humidity, but not enough to cover the probe surfaces.
❏ Make sure the storage vessel is sealed to minimize evaporation.
❏ Check the vessel periodically to make certain that water is still present.
GENERAL RECOMMENDATIONS FOR LONG TERM STORAGE
The following are long term storage recommendations listed by instrument type which will be
applicable for sondes with typical sensor configurations:
6000 UPG -- Remove all sensors except the combination DO/Conductivity/Temperature probe from
the sonde and store according to the instructions found in the following section on individual
sensors. Cover the empty ports with the provided plugs. Leave the DO sensor with electrolyte
and a membrane in place. Place approximately 400 mL of deionized, distilled, or tap water in the
calibration/storage vessel, insert the sonde into the vessel, and seal to minimize evaporation
600XL -- Remove the pH or pH ORP probe from the sonde and store according to the instructions
found in the following section on individual sensors. Cover the empty port with the provided
plug. Leave the conductivity/temperature and the dissolved oxygen probes in the sonde with a
membrane and electrolyte on the DO sensor. Place approximately 300 mL of deionized, distilled,
or tap water in the calibration/storage vessel, insert the sonde into the vessel, and seal with the
cap/O-ring to minimize evaporation.
6820 -- Leave the conductivity/temperature and the dissolved oxygen probes in the sonde with a
membrane and electrolyte on the DO sensor. Remove all other probes from the sonde and store
according to the instructions found in the following section on individual sensors. Cover the
empty ports with the provided plugs. Place approximately 300 mL of deionized, distilled, or tap
water in the calibration/storage vessel, insert the sonde into the vessel, and tighten the threaded
cup to attain a good seal and minimize evaporation.
600 (with Replaceable Reference Electrode Module) -- Instruments of this design were
generally sold after January, 1996 and can be identified by the presence of 4 probes (temperature,