Maintenance And Troubleshooting; Sensor Maintenance - Dissolved Oxygen; Cleaning The Sensor Cap - YSI EcoSense ODO200 Mode D'emploi

for calibration, transport, and storage of the EcoSense ODO200
probe.
2. Make sure there are no water droplets on the sensor cap or
temperature sensor and then install the storage sleeve over the
guarded probe. Make sure the DO and temperature sensors are
not touching the sponge or immersed in water. Turn the instrument
on and wait approximately 5 to 10 minutes for the storage sleeve
to become completely saturated and to allow the temperature and
dissolved oxygen sensors to stabilize.
3. Press CAL.
4. The display prompts for the local, true barometric pressure in
mBar (millibars). Use the Up and Down Arrow keys to increase or
decrease the barometric pressure value, then press Enter.
5. The display will show the current dissolved oxygen measurement
on the main display and the calibration value in the lower right
corner. Wait for the DO measurement to stabilize, then press Enter.
6. The display prompts for the approximate salinity of the water
to be analyzed. Use the Up and Down Arrow keys to increase or
decrease the salinity compensation value to the salinity value of
your sample (between 0 to 40 parts per thousand [ppt]). When the
correct salinity displays, press Enter.
7. The unit holds calibration for several months, even when powered
off and on.
M A I N T E N A N C E A N D
T R O U B L E S H O O T I N G

SENSOR MAINTENANCE - DISSOLVED OXYGEN

CLEANING THE SENSOR CAP

The Sensor Cap should be kept clean since some types of fouling can
consume or produce oxygen or block the water sample from reaching
the sensor which could affect the dissolved oxygen measurements.
To clean the Sensor Cap, gently wipe away any fouling with a lens
cleaning tissue that has been moistened with water. Do not use organic
solvents to clean the Sensor Cap. Using an organic solvent to clean the
Sensor Cap may cause permanent damage to the cap. For example,
alcohol will dissolve the outer paint layer and other organic solvents
will likely dissolve the dye in the cap. Dissolving or scratching the paint
or dye layer will cause erratic dissolved oxygen measurements.
To disinfect the probe, soak the probe in 3% hydrogen peroxide for 15
to 30 minutes and then rinse it with clean water.
9