12
4.
In the “Delete Each” mode, use
“Up”
and
“Down”
key to
select data to be deleted. Then press
“Enter”
key to delete.
Deletion is now complete. The next set of saved data will
automatically move up a slot in the storage site.
5.
Press
“Mode”
key to exit “Delete” mode.
SENSOR MAINTENANCE
Sensor caps last longer if stored in a moist environment and kept
clean and free of scratches in the paint layer. Erratic readings can
result from damaged or dirty caps. If unstable readings occur from
large scratches in the paint or dye layer, replace the sensor cap.
See the Maintenance and Troubleshooting section of this manual for
information on how to clean or replace the sensor cap. The average
sensor cap replacement interval is 12 to 18 months, although they
may last longer.
Avoid substances that may damage probe materials such as
concentrated acid, caustics and strong solvents. Probe materials
include urethane (cable), Xenoy (probe body), acrylic (sensor cap)
and acetal and stainless steel (probe guard).
To prevent the sensor cap from drying out, store the probe in the
gray calibration/storage sleeve with a moistened, clean sponge. In
the event the sensor cap dries out, rehydrate it following the
instructions in the Maintenance and Troubleshooting section of this
manual.
A. 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.
