Rehydrating The Sensor Cap; Sensor Maintenance - Temperature; Sensor Storage; Short-Term Storage - VWR DO220 Manuel D'instructions

message, re-enter the coefficients and check them carefully for correct
transcription from the Calibration Coefficient Label.
The coefficient values are hexadecimal. Due to the VWR DO220's
display, 6 and b look very similar. Hexadecimal values on the DO220 will
be displayed as: A, b, C, d, E, F, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
If you continue to get an error message after several entry attempts,
contact Technical Support for assistance.

Rehydrating the Sensor Cap

The Sensor Cap must remain in a moist environment; see Sensor
Storage for storage recommendations. If the sensor cap is allowed to dry
out, it is likely to drift slightly at the beginning of your next study unless
it is rehydrated. If the cap dries out, you can rehydrate it by soaking the
probe tip with the sensor cap installed in room temperature tap water for
24 hours. After rehydration is complete, recalibrate and be sure to store
the probe in a moist environment.

Sensor Maintenance - Temperature

You must keep the temperature portion of the sensor free of build up.
Other than that, the sensor requires no maintenance. A soft bristle brush,
like a tooth brush can be used to scrub the temperature sensor if needed.

Sensor Storage

Short-term Storage

When the optical DO sensor is not in use, store it in a moist environment.
For short-term storage (less than 30 days), moisten the sponge in the
calibration/storage sleeve with a small amount of clean water and place
this over the probe with the sensor cap and sensor guard installed. This
will provide a 100% saturated air environment.

Long-term Storage

For long-term storage (>30 days), remove the battery from the instrument.
Moisten the sponge in the calibration/storage sleeve with a small amount
of clean water and place this over the probe with the sensor cap and
sensor guard installed. Inspect the sponge every 30 days to make sure
it is still moist.
Alternatively, you can place the probe with sensor cap directly in a
beaker or other container of water, making sure that the water does not
evaporate over time.
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