YSI 600LS - User Manual - Manual (Page 127)

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-121
plug. Leave the conductivity/temperature and the dissolved oxygen probes in the sonde with a membrane
and electrolyte on the DO sensor. Place enough of deionized, distilled, or tap water in the calibration cup
to cover the sensors, insert the sonde into the vessel, and seal with the cap/O-ring to minimize evaporation.
6820V2-1, 6820V2-2, 6920V2-1, 6920V2-2, 6600V2-2, 6600EDS V2-2, and 6600V2-4 -- 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 enough of
deionized, distilled, or tap water in the calibration cup to cover the sensors, insert the sonde into the vessel,
and tighten the threaded cup to attain a good seal and minimize evaporation.
600R and 600QS (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,
dissolved oxygen, pH reference, and pH glass (600R) or pH glass/ORP (600QS) in the bulkhead. Remove
the reference module, store it as described below, and plug the open port with the insert that was provided.
Make certain that the dissolved oxygen sensor has an undamaged membrane and electrolyte in place.
Place approximately 300 mL of tap water in the storage vessel, insert the sonde, and seal the vessel with the
cap and O-ring. Do not use deionized or distilled water in this case, as it may damage the pH glass
sensor that must remain in the sonde.
600 (with Combination pH Sensor) -- Instruments of this design were generally sold prior to January,
1996 and can be identified by the presence of only 3 probes (temperature, dissolved oxygen, pH) in the
bulkhead. Be certain that the dissolved oxygen sensor has an undamaged membrane and electrolyte in
place. Fill the provided storage vessel with a solution that is 2 molar (2 M) in potassium chloride (KCl) to
a level that completely covers the dissolved oxygen and pH probes. See the following section for
instructions on preparation of the KCl storage solution. Seal the vessel with the cap and O-ring.
600 OMS V2-1 – Store sonde dry with optical probe left in port. Cover membrane on ROX sensor with
moist sponge.
All Sondes with Batteries – Because batteries can degrade over time and release battery fluid, it is
extremely important to remove the batteries from all 600XLM, 6920V2-1, 6920V2-2, 6600V2-2,
6600EDS V2-2, 6600V2-4, and 600 OMS V2-1(battery version) prior to long term storage. Failure to
remove batteries can result in corrosive damage to the battery terminals if the batteries happen to leak.
2.10.4
PROBE STORAGE
LONG-TERM STORAGE OF PROBES
The following sections provide additional details on the storage of individual sensors associated with
instruments in the 6-Series product line from YSI.
TEMPERATURE
No special precautions are required. Sensors can be stored dry or wet, as long as solutions in contact with
the thermistor probe are not corrosive (for example, chlorine bleach).
CONDUCTIVITY
No special precautions are required. Sensors can be stored dry or wet, as long as solutions in contact with
thermistor probe and conductivity electrodes are not corrosive (for example, chlorine bleach). However, it
is recommended that the sensor be cleaned with the provided brush prior to long term storage.